EXIT

Injection system 07.1

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07.1 Injection system

Job No.
. . . . . . . . . . . . . . . . . . . . . . . 07.1-001
Survey engine - injection pump - injection nozzle - nozzle holder
Operation of injection system ................................................ 010
A. Lubrication of injection pump ............................................
B. Relief throttle in delivery valve holder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
C. Layout and operation of RSF governor ......................................
D. Pneumatic idle speed increase ............................................
E. Reference impulse verification ( RI V) ........................................
F.Fuelpump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
G. Function diagram low pressure circuit .......................................
Operation of injection nozzles ................................................ 011
A. Flat surface pintle nozzle (standard version) ...................................
B. Hole-type pintle nozzle (a) ............................................
Operation of fuel preheater .................................................. 012

Testing and adjusting jobs

Adjustment of idle speed ................................................. 100
Checking pneumatic idle speed increase ........................................ 102
Checking engine output and exhaust gas on chassis dynamometer ....................... 104
Checking injection timing (high-pressure method) ...................... r. ......... 109
Checking injection timing (position pickup-RIV-method) ............................ 111
Checking injection timing with digital tester (RIV-method) ........................... 112
Adjusting injection timing (high-pressure method) - following checkup. .................. 115
Adjusting injection timing (position pickup-RIV-method) - following checkup .............. 116
Adjusting injection timing with digital tester (RIV-method) - following checkup ............ 117
Checking injection nozzles ................................................ 135
A. Throttle pintle and flat surface pintle nozzle ................................
B. Hole-type pintle nozzle ..............................................
Disassembling, cleaning, assembling and adjusting injection nozzles
.....................................................
(following checkup) 137
Checking fuel pump..................................................... 145
Checking vacuum shutoff for leaks ........................................... 150

Assembly jobs
Removal and installation of injection pump ..................................... 200
Renewing delivery valve seal ............................................... 210
Renewing vacuum control unit ............................................. 220
Removal and installation of injection nozzle ..................................... 230
Removal and installation of fuel pump ........................................ 235
Removal and installation of injection timer. ..................................... 240
Renewing fuel filter ..... ...... ..... . .. . . .. . . . . . . . . . . . . .. .. . .. ... .. ..... . 245

07.1/l
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07.1-001 Survey engine-injection pump-injection nozzle-nozzle holder

Standard version and @

Engine 601.911 601.921

standard version @

Injection pump PES4M55C320RS152

Injection nozzle DN 0 SD 261/- DN 0 SD 24-/

Nozzle holder KCA 30 S 46

07.1.10-00111
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07.1-010 Operation of injection system

The injection system differs from that of engines

615, 616 and 617 as follows:

Lubrication of injection pump.

Relief throttle in delivery valve holder.
Pneumatic idle speed increase.
Reference impulse verification (RIV).
Injection timing by means of adjusting device and
injection pump flange.
Injection system, self-venting.
Fuel pump with higher delivery capacity, thereby
eliminating hand pump.
Overflow valve with throttle (orifice).
Injection nozzle as flat surface pintle nozzle for
standard version and as hole-type pintle nozzle
for @.
Injection timer mounted directly on injection pump
shaft. Fastened by means of central bolt with left-
hand threads.
Fuel heater.

A. Lubrication of injection pump

The injection pump is connected to engine oil circuit

by means of an oil bore (arrow).

Oil return flow is by way of ring gap (x) between

bearing and housing in cylinder crankcase.

An O-ring (10) is installed on flange (la) for sealing

the clutch space between injection pump flange and
crankcase.

07.1.10-010/l
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B. Relief throttle in delivery valve holder

Relief throttles are installed in delivery valve holders

of injection pump to reduce the hydro-carbon share in
exhaust gas. An annular groove is located on delivery
valve holder for identification (arrow). The relief
throttle (7b) is a reed valve (74 with an orifice of
0.6 mm dia., which opens in direction of injection
nozzle. The valve seat (7d) is riveted into delivery
valve holder.

7 Delivery valve holder connection

7a Spring
7b Relief throttle
7c Reed valve
7d Valve seat
7e Delivery valve holder
7f Seal
7g Delivery valve

C. Layout and operation of RSF-governor 4a 4

The governor is an idle speed-maximum speed govern0

with its regulating spring (2 m) measured and adjusted
in such a manner that the governor will not govern
in partial load range, apart from adaptation (refer
to ,,Regulation during start and full load).

In partial load and full load range the control rod

(2t) of injection pump is operated by accelerator
pedal only, which is connected to adjusting lever
(29) of governor via regulating linkage.

The vacuum control unit (4) preloads the idle speed

spring and adjusts the idle speed.

07.1 .lO-010/2
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2 4a 4
6

2 Governor
2a Guide lever
2b Stop screw for deltvery at idle 2a
2c Transfer lever
2d Regulating lever
2e Spring capsule (adaptation) 2r
2f Full load adjusting screw
2g Adjusting lever -2b
2h Sliding sleeve
2i Flyweights (pump-governor-group)
2j Idle speed auxiliary spring-shutoff
2k Adjusting screw for idle speed auxiliary spring (tickler)
21 Tensioning lever -29
2m Governor spring
2n Idle speed spring
20 idle speed auxiliary spring (tickler)
2p Linkage lever 2h
2r Stop lever
2s Emergency stop lever 2c
2t Controi rod
4 Vacuum control unit idle speed increase
4a Adjusting nut for idle speed 2e
6 Vacuum control unit (stop)
2i 2f

1073-887911

2d
I IL-I

Regulation during start and full load

If, with the engine stopped, the adjusting lever (29)

is placed against full load stop (fixed stop on governor
housing), the transfer lever (2~) will swing around
pivot ,,B and will take the regulating lever (2d)
along in direction of start.

In full load position of adjusting lever (29 ,,full

throttle) the idle speed auxiliary spring (20, tickler)
is forced away from guide lever under influence of idle
speed auxiliary spring-shutoff (2j) A faster break away
from starting position of governor will result.

a Start c Idle speed stage

b Stop d Adaptat ion

1073 - 8880/2
07.1 .lO-010/3
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After running through idle speed stage (c), the

sliding sleeve (2h) rests against spring capsule (2e)
As a result, the control rod of the injection pump
will be moved into full load position via transfer
lever (2~) and regulating lever (2d).

When a given speed has been attained, excess pressure

is applied to spring capsule (2e) for a given distance
(d) (adaptation).

If the engine speed is still increasing, the force of the

flyweights is sufficient to apply excess pressure to
regulating spring (2m) (maximum speed breakaway).

Start of breakaway depends on preload of regualting

spring {2m).

Regulation at idle speed

Linkage lever (2~) rests against idle speed stop

screw (2b). With increasing speed, the sliding sleeve
(2h) runs through idle speed stage. Guide lever (2a)
swivels around pivot ,,A and is thereby acting
against idle speed spring (2n).

At a given speed the guide lever (2a) rests against 4a 4

adjusting nut of idle speed auxiliary spring (20). I I
The movement of the sliding sleeve (2h) is trans-
mitted to control rod of injection pump via transfer
lever (2~) and regulating lever (2d) in the same sense
of direction. After running through idle speed stage,
the sliding sleeve (2h) will rest against spring
capsule (2e).

If the engine speed continues to increase (e.g. under

influence of deceleration), excess pressure will first
be applied to spring capsule (2e) and then to regula-
ting spring (2m) as from a given speed. This will move
the control rod into ,,stop position.

a Start
b Stop 1073-888111

07.1 .lO-010/4
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Stop position of governor 4a 4

The vacuum control unit (6) is provided with a

vacuum by means of vacuum pump via steering lock
of vehicle. As a result, the diaphragm of the vacuum
control unit is attracted against the pressure of the
diaphragm spring.

The vacuum control unit (6) is connected to a stop

lever (2r). This lever will swivel around pivot ,,D
and will thereby pull the control rod of the injection
pump into ,,stop position.

This will bridge the shunt spring of the regulating

lever. Likewise, the control rod can be pulled from
outer side of governor into ,,stop position via
emergency stop lever (2s).

1073-008212

D. Pneumatic idle speed increase

Idle speed increase for rpm stabilization is effected

up to approx. 17 OC coolant temperature, as well as
on vehicles with automatic transmission when the
refrigerant compressor is additionally connected
also above approx. 17 OC coolant temperature.

The vacuum control unit (4) attached to governor

housing is activated via thermovalves (128 and 130)
and switchover valve (127). If the vacuum control
unit (4) is energized by a vacuum (approx. 500 mbar),
the idle speed spring is attracted via plunger (4b)
of vacuum control unit. The idle speed control
characteristic is displaced and the idle speed is
increased by approx. lOO/min.

07.1.10-010/5
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Coolant temperature < approx. 17 OC

Thermovalve (128) is opened, thermovalve (130) is

closed. On vehicles with automatic transmission
the vacuum flows via switchover valve (1271, and on
vehicles with manual transmission directly to vacuum
control unit (4).

Coolant temperature > approx. 17 OC

Thermovalve (128) is closed, thermovalve (130) is

opened. The vacuum control unit is connected to
atmosphere and the rpm increase is cancelled.

When the refrigerant compressor is additionally

connected (vehicles with automatic transmission
only) the switchover valve is energized and will
switch. The vacuum flows through upper connection
of switchover valve to vacuum control unit (4).

07.1 .lO-010/6
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-----e

Function diagram Idle speed increase with manual transmission, standard version and @ Federal

1 Injection pump a Vent line to vehicle interior bk = black

Governor b Key shutoff bl = blue
: Vacuum control unit idle speed increase c Remaining consumers br = brown
ADA-capsule (altitude pressure compensator@ e Brake unit gr = green
: Vacuum control unit (stop) Pu = purple
62 Vent filter re = red
67 Vacuum pump wh = white
128 Thermovalve closes at approx. 17 C
130 Thermovalve opens at approx. 17 OC
140 Check valve brake unit

07.1 .lO-010/7
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Function diagram idle speed increase with automatic transmission, standard version

1 Injection pump a Vent line to vehicle interior bk = black

2 Governor b Key shutoff bl = blue
4 Vacuum control unit idle speed increase c Remaining consumers br = brown
ADA-capsule (altitude pressure compensator@ d Vacuum control unit automatic transmission gr = green
: Vacuum control unit (stop) e Brake unit Pu = purple
a Orifice (blue) re = red
:: Vent filter wh = white
Vacuum control valve
:75 Vacuum pump
72 Damper
128 Thermovalve closes at approx. 17 C
130 Thermovalve opens at approx. 17 C
140 Check valve brake unit

07.1.10-010/8
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Function diagram idle speed increase with automatic transmission,@ Federal

1 Injection pump a Vent +ine to vehicle interior bk = black

2 Governor b Key shutoff bl = blue
4 Vacuum control unit idle speed increase Remaining consumers br = brown
5 ADA-capsule (altitude pressure compensator) : Vacuum control unit automatic transmission gr = green
6 Vacuum control unit (stop) e Brake unit Pu = purple
61a Orifice (blue) g To refrigerant compressor re = red
61 b Orifice 0.5 mm dia. oranae wh- white
Vent filter
Vacuum control valve
67 Vacuum pump
72 Damper
127 Switchover valve, electric
128 Thermovalve closes at approx. 17 OC
130 Thermovalve opens at approx. 17 C
140 Check valve brake unit

07.1 .lO-010/g
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Function diagram idle speed increase with manual transmission, @ California

1 Injection pump a Vent line to vehicle interior bk = black

2 Governor b Key shutoff bl = blue
4 Vacuum control unit idle speed increase c Remaining consumers br = brown
5 ADA-capsule (altitude pressure compensator) d Vacuum control unit automatic transmission gr = green
6 Vacuum control unit (stop) e Brake unit pu = purple
60 EGR-valve f To refrigerant compressor-control unit re = red
61 b Orif ice 0.5 mm dia. (orange) ,- = vellow
ve I- ;-
Vent filter
Vacuum control valve
Vacuum pump
ii Pressure control flap
100 Vacuum control unit for (99)
105 Intake manifold
110 Exhaust manifold
120 EGR-line
123 Pressure converter
124 Adjusting screw for (123)
125 Switchover valve electric for EGR-valve
126 Switchover valve electric for pressure control flap
128 Thermovalve closes at approx. 17 C
130 Thermovalve opens at approx. 17 C
140 Check valve brake unit

07.1.10--010/10
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Function diagram idle speed increase with automatic transmission, @ California

1 Injection pump a Vent line to vehicle interior bk = black

2 Governor b Key shutoff bl = blue
4 Vacuum control unit idle speed increase c Remaining consumers br = brown
5 ADA-capsule (altitude pressure compensator) d Vacuum control unit automatic transmission gr = green
6 Vacuum control unit (stop) e Brake unit pu = purple
60 EGR-valve f To refrigerant compressor-control unit re = red
61 a Orifice ye = yellow
61 b Orifice 0.5 mm dia. (orancte)
Vent filter
8 Vacuum control valve
67 Vacuum pump
Damper
;: Pressure control flap
100 Vacuum control unit for (99)
105 Intake manifold
110 Exhaust manifold
120 EGA-line
123 Pressure converter
124 Adjusting screw for (123)
125 Switchover valve electric for EGR-valve
126 Switchover valve electric for pressure control flap
127 Switchover valve electric for rpm increase
128 Thermovalve closes at approx. 17 C
130 Thermovalve opens at approx. 17 C
140 Check valve brake unit

07.1.10-010/11
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E. Reference impulse verification (RI V)

Measuring the association of injection pump in

relation to engine requires two signals:

l TDC-impulse from crankshaft.

l Regulating impulse from injection pump.

Both impulses are supplied by impulse transmitters.

To obtain a measuring signal, the sensor pins must
be moved past the impulse transmitters at a minimum
speed (idle speed). A measuring instrument measures
the chronological distance between the two impulses
and converts the result into an angle value, which
is then indicated.

001 Digital tester 016 Socket

2 Governor 017 Reference impulse transmitter
2i Flyweight with sensor pin 021 TDC-impulse transmitter
015 Test cable 059 Sensor pin

07.1 .lO-010/12
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F. Fuel pump

An increased delivery capacity of fuel pump makes

the fuel system self-venting. The manual delivery
pump is no longer installed.

E Delivery end
D Suction end

Venting of injection pump requires an orifice in

overflow valve.

Overflow valve with 1.5 mm dia. orifice

The overflow valve prevents unfiltered fuel from

entering injection pump.

a Housing
b Ball
c Spring
d Slide
e Inlet

07.1.10-010/13
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G. Function diagram low pressure circuit

148

Injection pump
Fuel pump
Overflow valve with orifice 1.5 mm dia.
Injection nozzles
Fuel prefilter
Leak oil hose
Injection line cylinder 1
Fuel tank
Fuel filter top
a Orifice in fuel filter top 0.8 mm dia.
Fuel thermostat open, position up to +8 C, fuel is preheated
Supply line - cold fuel
a Return line - preheated fuel
Heater feed line with fuel heat exchanger

07.1.10--010/14
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Injection pump 80 Return line

3 Fuel pump 81 Expanding screw
Overflow valve with orifice 1.5 mm dia. 82 Inlet fuel filter
:; Hollow screw 83 Inlet injection pump
42 Fuel filter 84 Hose clamp
43 Fuel prefilter 86 Fuel thermostat
50 Leak oil hose 87 Supply line fuel-heat exchanger
73 Fuel filter top 87a Return line fuel-heat exchanger
Hollow screw fuel filter 88 Supply line fuel thermostat
:: O-ring 89 Suction line fuel pump
77 Sealing ring fuel filter 148 Heater feed pipe with
78 Sealing ring fuel heat exchanger
79 Rung-type fitting

07.1.10-010/15
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70
xf@
F
69
\
%64b

55----1 - 5 6

25 1

.J ..-
7 >J 11
ai 71
-I /I 23

3 Fuel pump 26 Adjusting lever

4 Vacuum control unit idle speed increase ,,PLA 30 Injection nozzle, complete
5 ADA-capsule (altitude pressure compensator) 50 Leak oil hose
6 Vacuum control unit (stop) 51 Hose clamp
8 Injection timing-adjusting device 52 Closing plug
10 O-ring (seal) 53 Nozzle reed
11 Closing plug - RIV 54 Injection line 1
13 Fastening screw front 55 Injection line 2
13a Fastening screw rear 56 Injection line 3
13b Screw for assembly basket 57 Injection line 4
14 Cage nut 64 Holder, cylinder 4, nozzle end
15 Overflow orifice 1.5 mm dia. injection pump 64a Holder, cylinder 4, pump end
16 Damper 64b Screw
18 Injection timer 66 Holder, lines
18a Injection timer-assembly basket 68 Plastic clip
19 Center fastening screw ,,lefthand threads 68a Plastic clip
20 Washer 69 Rubber base
23 Pressure connection-delivery pump 70 Plastic holder for 3 lines
24 Holder, injection pump rear 71 Plastic holder for 2 lines
25 Spring

07.1 .lO-010/16
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07.1-011 Operation of injection nozzles

A. Fiat surface pintle nozzle (standard version)

Bosch designation DN 0 SD 261/-

Differs from pintle nozzle fy a flat surface (arrow)

on throttle pintle (41). This will improve throttle
effect.

30 Injection nozzle, complete

32 Nozzle body
37 Nozzle holder top
41 Throttle pintle
44 Injection pintle

B. Hole-type pintle nozzle USA

Bosch designation DN 0 SD 240/

Differs from pintle nozzle by a transverse and

lengthwise bore (46 and 47) in throttle pintle. A
service-free bar filter (filter cartridge) (45) is
inserted in nozzle holder top (37).

30-

45--

30 Injection nozzle, complete

37 Nozzle holder top
45 Bar filter (filter cartridge)
46 Transverse bore
47 Lengthwise bore

07.1.10-01 l/l
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07.1-012 Operation of fuel preheater

A fuel heat exchanger (148) is installed in feed line

of heater to preheat the fuel.

Full preheating up to +8 OC. The required fuel is

guided through fuel heat exchanger.

Fuel heat exchanger

c SUPPlY
D Return flow
E Heater feed

Mixed operation from +8 OC to +25 OC. The required

fuel flows partially via fuel heat exchanger.

Above +25 OC the fuel heat exchanger is shorted by a

thermostat. No more fuel will flow through fuel heat
exchanger.

A Supply from fuel tank

B Suction line to fuel pump
C Supply to heat exchanger
D Return flow to fuel heat exchanger

07.1.10-012/l
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Function diagram fuel preheating up to +8 C

lniection cumc 50 Leak oil hose

3 F;el pumb 54 Injection line cylinder1
15 Overflow valve with orifice 1.5 mm dia. 63 Fuel tank
30 Injection nozzle 86 Fuel thermostat
42 Fuel filter 87 Supply line (cold fuel)
42a Orifice in fuel filter top 0.8 mm dia. 87a Return line (preheated fuel)
43 Fuel prefilter 148 Fuel heat exchanger

07.1.10-012/2
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148

Function diagram fuel preheating above +25 C

1 Injection pump 50 Leak oil hose

3 Fuel pump 54 Injection line cylinder 1
15 Overflow valve with orifice 1.5 mm dia. 63 Fuel tank
30 Injection nozzles 86 Fuel thermostat closed
42 Fuel filter 87 Supply line (cold fuel)
42a Orifice in fuel filter top 0.8 mm dia. 87a Return line (preheated fuel)
43 Fuel prefilter 148 Fuel heat exchanger

07.1 .lO-012/3
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07.1-100 Adjustment of idle speed

Job no. of work units or standard texts and flat rates data 07-2053

Test value

Idle speed 750 + 50/min

Special tool

TDC-impulse transmitter 601 589 04 21 00

Conventional tool

e.g. Bosch, MOT 001.03

Digital tester
e.g. Sun, DIT 9000

1 Connect digital tester (001) and impulse trans-

mitter (021).

2 Check regulation for easy operation and condition.

3 Run engine to 60-80 OC coolant temperature.

07.1.10-100/l
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4 Disengage connecting rod (204) on transfer lever (214)

5 Check idle speed 750 4 5O/min, adjust by turning

vat:uum control unit (41, if required, loosen counter-
nult (4a) for this purpose.

6 Engage connecting rod (204) free of tension.

7 Switch on all auxiliary units and check engine for

smooth running.

07.1.10-100/2
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07.1-102 Checking pneumatic idle speed increase

Job no. of work units or standard texts and flat rates data 07-2009.

Test values

Idle speed increase min lOO/min

at approx. 500 mbar

Permissible pressure drop of system from 500 to 400 mbar

approx. 1 min

Special tool

Test unit O-1000 mbar for vacuum 116589252100

\ 1 g
s
i
\J

Note

Prior to performing this job, check idle speed

adjustment.

Renewing of vacuum control unit on injection pump

can be made at a Bosch service station only, since
renewal of vacuum control unit requires disassembly
of governor and subsequent adjustment on a Bosch
injection pump test bench.

Engine at idle.

Connect vacuum tester to straight connection

of thermovalve (130) and energize with
500 mbar. Engine speed increases by approx.
1 OO/min.

Check thermovalves (128 and 130).

Make sure that thermovalve (128) has no
passage. Thermovalve (130) must have
passage. Renew thermovalve, if
required.

Check vacuum lines according to function

diagram.

07.1.10--102/l
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Engine stopped.

Check vacuum control unit (4) for leaks.

Energize vacuum tester, connection as above,

with approx. 500 mbar. Vacuum value may drop
approx. 100 mbar in 1 minute.

Check vacuum lines and connections

for damage, renew vacuum control
unit, if required.

Check vent line for passage. Engine stops. Pull

vacuum line from straight connection of thermo-
valve (130) and connect with vacuum tester.
Operate hand pump, but do not build up a
vacuum.

Vent line
in order

vacuum line.

End of test

07.1.10-102/2
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07.1-104 Checking engine output and exhaust gas on chassis dynamometer

Job no. of work units or standard texts and flat rates data 07-1200.

Scope
Fill in data sheet.
Check fluid levels in engine, radiator and automatic transmission.
Remove and install air cleaner cover.
Connect digital tester according to connection diagram.
Check regulating system for easy operation and for condition and lubricate.
Check full throttle stop of accelerator pedal and adjust.
Run engine oil temperature under partial load to 75-85 OC.
Check idle speed, adjust.
Check pneumatic idle speed increase.
Check max. speed under no load condition.
Check tire pressure of rear wheels.
Cool engine with blower.
Check performance - perform tachometer checkup.
Exhaust gas (emission) test under load.

Test values

Performance reference values and exhaust gas (emission) value

transmission

Note: During performance measurements be sure to include the different influencing factors.

1 The test values are minimum performances; the permissible losses for power steering of approx. 1.5 kW (2 HP) are already
deducted.

Injection timing at 750 2 50/min 15O f lo after TDC*)

Idle speed 750 f 50/min

Idle speed increase min. lOO/min at approx. 500 mbar

* 1 RI-value - indirect injection timing.

07.1.10-104/l
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Special tools

Oil telethermometer 116589272100

TDC-impulse transmitter 601 589 04 21 00

_--
d
-\

Exhaust gas probe, flexible 126 589 11 63 00

R l-transmitter 617 589 1021 00

Adapter (for available digital testers) 617 5890921 00

Conventional testers

CO-measuring instrument

e.g. Bosch, ETD 019.00

Digital testers e.g. Sun, DIT 900

e.g. AVL, Diesel-Tester 875

07.1.10-104/2
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Connection diagram for test instruments without adapter,

e.g. Bosch ETD 019.00, Sun DIT 9000, AVL Diesel-Tester 875

001 Digital tester 016 Diagnosis socket

2 Governor 017 R l-transmitter
2i RI-transmitter pin 021 TDC-impulse transmitter
015 Test cable with plug 59 TDC-transmitter pin

07.1.10-104/3
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Connection diagram for available testers with adapter,

e.g. Bosch 001.03, Hartmann & Braun EOMT 3

001 Digital tester 015 Test cable with plug

2 Governor 016 Diagnosis socket
2i R l-transmitter pin 017 RI-transmitter
010 Adapter 021 TDC-impulse transmitter
011 Trigger clamp 59 TDC-transmitter pin

07.1 .lO-104/4
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Checking

1 Fill in data sheet.

2 Check fluid levels: in engine, radiator and auto-

matic transmission and correct, if required.

3 Remove and install air cleaner cover.

4 Connect digital tester according to connection

diagram.

5 Check ragulating system for easy operation and

condition and lubricate.

6 Check full throttle stop from direction of

accelerator pedal, adjust by means of adjusting screw
(2291, if required.

7 Run engine oil temperature under partial load to

75-85 OC.

8 Disengage connecting rod (204) on transfer lever

(214).

9 Check idle speed 750 + 50/min, adjust by turning

vacuum control unit (41, if required, loosen counter-
nut (4a) for this purpose.

Engage connecting rod (204) free of tension.

Switch on all auxiliary units and check engine speed.

10 Check pneumatic idle speed increase:

Attention!
Prior to performing this job, check idle speed ad-
justment.

The vacuum control unit for idle speed increase on

injection pump can be renewed only with injection
pump removed.

07.1.10-104/5
 EXIT

Engine at idle.

Connect vacuum tester to straight connection of

thermovalve (130) and energize with 500 mbar. En-
gine speed increases by approx. lOO/min, check
pneumatic idle speed increase, if required (07.1-102).

Note: The vacuum control unit idle speed increase

on injection pump can be renewed only with injection
pump removed.

11 Secure front wheels. For this purpose, place

chocks at a distance of approx. 100 mm in front of
front wheels.

12 Check tire pressure of rear wheels and correct,

if required.

13 Check trunk contents, remove heat-sensitive

items.

14 Cool engine with blower.

15 Check full load performance.

Attention!
Run at full load only as long as required for reading
the instruments.

16 Check exhaust gas (emission) value under load.

If the specified exhaust gas values under load cannot

be attained in spite of fully including idle speed
emission value tolerance, set injection pump on pump
test bench to upper tolerance limit.

07.1.10-104/6
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07.1-109 Checking injection timing (high-pressure method)

Job no. of work units or standard texts and flat rates data 07-8234.

Test value

In compression stroke
Injection timing
24O before TDC

Attention!
While measuring, move regulating lever of injection
pump to full load and pull off vacuum hose at
vacuum control unit ,,Stop.

Tightening torque (reference value) Nm

Injection line 1 O-20

Special tools

Pump unit, complete 617589007100

Connecting parts with storage case 617589009100

Quick lock 617589029100

e 3 &ao+U)102

Torque wrench with plug-in ratchet, 001589662100

l/2 square, 25-l 30 Nm

Box wrench element, open, 14 mm, 000589770300

l/4 square for injection lines

Socket wrench element 27 mm, 001589650900

l/2 square

07.1 .lO-109/l
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Testing

1 Clean injection lines in range of coupling nuts

on injection pump as well as on fuel filter.

2 Set control rod of injection pump to full load.

Adjusting lever on full load stop

3 Completely remove air cleaner.

4 Pull off vacuum line on stop capsule.

5 Unscrew injection line from cylinder 1.

Screw test line with sight glass to injection pump

and install return flow line to fuel tank of pump unit.

6 Close fuel return line from injection pump to

fuel filter. Insert O-ring into ring fitting (79) of return
flow line and firmly press in quick lock (arrow).

07.1 .lO-109/2
 EXIT

7 Connect supply line from pump unit to injection

pump supply (arrow).

8 Connect connecting cable of pump unit to vehicle

battery (red terminal positive, black terminal nagative).

9 Rotate crankshaft in direction of rotation of

engine up to approx. 35O before TDC in compression
stroke of first cylinder. Engage pump unit.

Attention!
Engage pump unit for measuring only. If an injection
nozzle is leaking, fuel may enter combustion chamber.

10 Rotate crankshaft slowly in direction of rotation

of engine while watching fuel jet in sight glass.

If fuel jet changes to chain-like drops, start of

delivery (injection timing) has been attained.

In this position, read begin of delivery (injection

timing) on graduated scale on belt tension.

Nominal value: 24O before TDC.

A Fuel jet, full

B Fuel jet, restricted
twior to besin of delivery
C bhain-like &ops begin oi delivery

07.1 .lO-109/3
 EXIT

11 Disconnect pump unit. Assemble injection system.

Mount air cleaner.

Note: When engine is started, the injection system

will vent itself automatically.

12 Run engine and check all connections for leaks.

63

107%1028711

Connection diagram high-pressure overflow method

w Return flow line 1 Injection pump A Hollow screw, fuel supply from pump unit
ZZZ High-pressure approx. 34 bar 03 Sight glass B Fuel return flow line closed with quick
04 Pump unit lock or clamp
06 Pressure limiting
valves (not required)
42 Fuel filter
63 Fuel tank

07.1 .lO-109/4
 EXIT

07.1-111 Checking injection timing (position pickup-RIV-method)

Job no. of work units or standard texts and flat rates data 07-8240.

Test values

Test value Adjusting value

RI-value (indirect injection timing) 15 + lo after TDC 15O after TDC

Tightening torques (reference values) Nm

Closing plug on governor (measuring point) 30-35

Injection lines 1 O-20

Injection pump flange 20-25

Special tools

Torque wrench with plug-in ratchet, 001 5896621 00

l/2 square, 25-130 Nm

Position indicator 617 589 08 21 00

Socket wrench element 27 mm, 001 589 65 09 00

l/2 square

Checking

1 Remove air cleaner top (arrows).

07.1.10-111/l
 EXIT

2 Remove closing plug (11).

Attention!
Attach emerging oil.

3 Screw position indicator into governor housing.

Make sure that the guide pin of positioning indicator
(arrow) is extending in upward direction. Tighten
coupling nut manually.

4 Connect position indicator according to connection

diagram.

07 Position indicator
0 8 Indicator
09 Battery terminal (battery positive)
7073-no08

07.1.10-l 1 l/2
 EXIT

5 Rotate crankshaft with tool manually (in direction

of rotation only), until lamp ,,A lights up. Carefully
continue rotating crankshaft until both lamps are
lighting up ,,A + B. In this position, read RI-value
(indirect injection timing) on graduated disk.

Nominal value: 15O after TDC

If only lamp ,,B ist lighting up, repeat test.

6 Remove position indicator.

7 Screw in closing plug.

8 Mount air cleaner top.

9 Perform leak test with engine running.

10 Check engine oil level and correct, if required.

07.1.10-111/3
 EXIT

07.1-l 12 Checking injection timing with digital tester ( RIV-method)

Job no. of work units or standard texts and flat rates data 07-8244.

Test values

Mm 750 f 50/min

RI-adjusting value ) 15O after TDC

R l-test value 15O + lo after TDC

1 Indirect injection timing.

Tightening torques (reference values) Nm

Closing plug on governor (measuring point) 30-35

Injection pump flange 20-25

Special tools

TDC-impulse transmitter 601 589042100

/
I
di

R l-transmitter 617589102100

Adapter (for available digital testers) 617689092100

Torque wrench with plug-in ratchet, 001 589 66 21 00

l/2 square, 25-l 30 Nm

Conventional tools

Application with adapter

e.g. Bosch, MOT 001.03

Digital testers
e.g. Hartmann & Braun, EOMT 3

07.1.10-l 12/l
 EXIT

Application without adapter

e.g. Bosch, ETD 019.00

Digital testers e.g. Sun, DIT 900

e.g. AVL, Diesel-Tester 875

Connection diagram for available testers with adapter,

e.g. Bosch MOT 001.03, Hartmann & Braun EOMT 3

001 Digital tester 017 RI-transmitter

010 Adapter 021 TDC-impulse transmitter
011 Trigger clamp Reaulator
015 Test cable with plug 5i RI-transmitter pin
016 Diagnosis socket 59 TDC-transmitter pin

07.1.10-112/2
 EXIT

Connection diagram for testers without adapter,

e.g. Bosch ETC 019.00, Sun DIT 9000, AVL Diesel-Tester 875

2 Regulator 016 Diagnosis socket

2i RI-transmitter pin 017 R l-transmitter
001 Digital tester 021 TDC-impulse transmitter
015 Test cable with plug 59 TDC-transmitter pin

Checking

Remove air cleaner cover (arrows),

07.1.10-l 12/3
 EXIT

2 Remove closing plug from regulator.

Attention!
Catch emerging oil.

3 Connect digital tester accord ing to connection

diagram.

017 RI-transmitter on regulator (injection pump)

021 TDC-impulse transmitter on holder (engine)

4 Engine at idle. Read TI-value (indirect injection

timing) at idle speed 750 k 50/min on digital tester.

RI-nominal value: 15O after TDC at 750 + 50/min.

07.1.10-l 12/4
 EXIT

Stop engine.

Disconnect digital tester.

Screw in closing plug on regulator.

Mount air cleaner top.

Perform leak test with engine running.

10 Check engine oil level, and correct, if required.

07.1.10-112/5
 EXIT

07.1-l 15 Adjusting injection timing (high-pressure method) - following checkup

Job no. of work units or standard texts and f tat rates data 07-8300.

Note

Prior to adjustment, check injection timing on

cylinder 1 (07.1-109).

Adjusting
-

1 Set crankshaft in direction of roation to 24O be-

fore TDC in compression stroke of 1st cylinder.

2 Loosen fastening screws (arrows) on injection

pump flange and on supporting holder (arrow).

Fastening of supporting holde

07.1.10-l 15/l
 EXIT

3 Engage pump unit.

4 Swivel injection pump by turning adjusting screw

on adjusting device, while watching fuel jet. If the
fuel jet changes to chain-like drops, begin of delivery
(injection timing) has been attained.

Nominal value: 24O before TDC.

Direction of rotation of adjusting screw

Clockwise = injection timing retarded

Counterclockwise= injection timing advanced

Note: If adjustment cannot be made any further,

displace injection pump. Removal and installation
of injection pump (07.1-200).

A Fuel jet full

B Fuel jet restricted
shortly before begin of delivery (injection timing)
C Chain-like drops begin of delivery (injection timing)

5 Disconnect pump unit.

6 Assemble injection system and check regulating

linkage, adjust, if required (30-300).

Note: When the engine is started, the injection system

will automatically vent itself.

7 Run engine and check all connections for leaks.

07.1.10-l 15/2
 EXIT

07.1-l 16 Adjusting injection timing (position pickup-RIV-method) - following checkup

Job no. of work units or standard texts and flat rates data 07-8300.

Note

Prior to making adjustments, check begin of delivery

(injection timing) (07.1-l 11).

Adjustment
-

1 Set crankshaft in directi on of rotation to 15O

after TDC of first CY !linder.

2 L o o s e n fasteni w screws (arrows) on injection

pump flange and ( 3n suppro lting holder (arrow).

Screw on supporting hol der

07.1.10-l 16/l
 EXIT

3 Swivel injection pump by turning adjusting screw

on injection timing-adjusting device until both lamps
are lighting up.

Direction of rotation of adjusting screw

Clockwise = injection timing retarded

Counterclockwise = injection timing advanced

RI-nominal value 15O after TDC.

Note: If adjustment cannot be made any further, dis-

place injection pump. Removal and installation of
injection pump (07.1-200).

4 Tighten fastening screws on injection pump flange

and on supporting holder.

5 Remove position indicator (position pickup).

6 Screw in closing plug.

7 Mount air cleaner top.

8 Check control linkage and adjust, if required

(30400).

9 Perform leak test with engine running.

10 Check engine oil level and correct, if required.

07.1.10-116/2
 EXIT

07.1-l 17 Adjusting injection timing with digital tester(R IV-method) - following checkup

Job no. of work units or standard texts and flat rates data 07-8300.

Note

Prior to making adjustments, check begin of delivery

(injection timing) (07.1-l 12).

Adjusting

1 Loosen fastening screws (arrows) on injection

pump flange as well as on supporting holder (arrow).

Screw on supporting holder

2 Run engine at 750 f 50/min at idle.

3 Adjust RI-value (indirect injection timing) by

turning adjusting screw on injection timing-adjusting
device.

RI-nominal value: 15O after TDC at 750 2 50/min.

Direction of rotation of adjusting screw

Clockwise = injection timing retarded

Counterclockwise = injection timing advanced

07.1.10-l 17/l
 EXIT

Note: If adjustments cannot be made any further,

displace injection pump. Removal and installation of
injection pump (07.1-200).

4 Stop engine.

5 Disconnect tester.

6 Screw in closing plug on regulator.

7 Mount air cleaner.

8 Check control linkage and adjust, if required

(30-300).

9 Perform leak test with engine running.

10 Check engine oil level and correct, if required.

07.1.10-117/2
 EXIT

07.1-135 Checking injection nozzles

Job no. of work units or standard texts and flat rates data 07-6712.

Injection nozzles removed (07.1-230).

Test values

Injection nozzle new used

Opening pressure in bar 115-125 min. 100

Special tool

Cleaning unit

Conventional tools

Tester EFEP 80 H e.g. Bosch, D-7000 Stuttgart

order no. 0 881 200 502

Cleaning needle 0.18 mm dia. e.g. Bosch, D-7000 Stuttgart

order no. KDEP 2900/4

Note

For testing, use clean test oil or filtered diesel oil

only. When checking a nozzle, never place hand in
jet of a nozzle. The jet will enter deeply and destroy
the tissue. Fuel entering the blood may cause blood
poisoning.

A. Throttle pintle and flat surface pintle nozzle

1 Energetically pump 5 times through injection

nozzle on tester. Then test buzzing of nozzle, slowly
actuating hand lever for this purpose (approx. 1
stroke per second).

07.1.10-135/l
 EXIT
2 Test jet: During short, fast partial strokes (at
least 2 strokes per second) the jet should be rather
closed and tear off well.

A Jet pattern closed and well atomized

B Jet pattern torn up, too wide and spreading

3 Check opening pressure: Nominal value 115-125

bar with new nozzle, min. 100 bar with used nozzles.

Move hand lever slowly downward (at least 1 stroke

per second) and read opening pressure on pressure
gauge.

For this test, shutoff valve mut be open.

B. tiole-type pintle nozzle

1 Prior to testing: Check longitudinal bore (151

with cleaning needle of 0.18 mm dia. for passage.

2 Energetically pump 5 times through injection

nozzle on tester. Then test buzzing of nozzle, slowly
actuating hand lever for this purpose (approx. 1 stroke
per second).

07.1 .lO-135/2
 EXIT

3 Test jet During short, fast partial strokes (at

least 2 strokes per second) the jet should be rather
closed and tear off well.

_ Jet pattern closed and well atomized

A
B Jet pattern torn up, too wide and spreading I
I,I#;I;

4 Generate initial jet by moving hand lever slowly

in downward direction (4-6 s/stroke).

A vertical cord-like jet should come out of center

bore (15).

Note: On new nozzles it is rather difficult to generate

the initial jet, for this reason check longitudinal bore
with cleaning needle of 0.18 mm dia. for passage.

5 Check opening pressure.

Nominal value: 115-l 25 bar with new nozzle, at

least 100 bar with used nozzle.

Move hand lever slowly in downward direction (approx.

1 stroke per second) and read opening pressure on
pressure gauge.

Shutoff valve must be open during test.

07.1.10-135/3
 EXIT
07.1-137 Disassembling, cleaning, assembling and adjusting injection nozzles
(following checkup)

Job no. of work units or standard texts and flat rates data 07-6750.

31 Nozzleneedle.. . . . . . . . . . . . . . . . . . . . . . . . Visual and slide test; on hole-type pintle nozzle clean

center and longitudinal bore
32 Nozzle body . . . . . . . . . . . . . . . . . . . . . . . . . . Remove combustion residue
33 Nozzle holder element ................... Touch up on surface plate
34 Thrustpin . . . . . . . . . . . . . . . . . . . . . . . . . . . Tip should point toward upper part
35 Nozzle holder lower part .................. 70-80 Nm
36 Compression spring
37 Nozzle holder upper part. ................. Clamp in protective jaws
40 Steel disk ............................ Adjust for opening pressure.
Nominal value 115-125 bar with new nozzle or nozzle
to be newly adjusted, min. 100 bar with used nozzle.
Opening pressure will be higher or lower depending
on thickness of disk, 0.05 mm provide approx. 3 bar
difference in pressure

07.1.10-137/l
 EXIT

Special tools

Torque wrench with plug-in ratchet, 001 589 66 21 00

l/2 square, 25-130 Nm

Socket wrench element 27 mm, l/2 square 001 589 65 09 00

Cleaning unit

Conventional tool

Cleaning needles 0.18 mm dia. e.g. Bosch, D-7000 Stuttgart

order no. KDEP 2900/4

Note

During disassembly, make sure that the nozzle body,

the nozzle needle and the individual parts are not
mixed up among each other.

Disassembly

1 Clamp injection nozzle holder upper part (37) with

protective jaws into vice in such a manner that the
leak oil line connections are not damaged.

07.1.10-137/2
 EXIT

2 Disassemble injection nozzle.

36
34
+!?
E933

Nozzle needle
Nozzle body 32
Nozzle holder element
Pressure pin
Injection nozzle holder lower part
Compression spring
injection nozzle holder upper part 35
Steel disk for making adjustments

Cleaning and testing

3 Remove combustion residue on nozzle needle seat

with cleaning cutter.

4 Clean nozzle needle and nozzle body with brass

brush.

07.1 .lO-137/3
 EXIT

5 Visual and slide check.

Immerse nozzle into filtered diesel fuel. With nozzle

body held vertically, the nozzle needle should slide
under its own weight in direction of nozzle seat.

6 Touch up nozzle holder element (33) on surface

plate.

7 With hole-type pintle nozzle, additionally clean

longitudinal and transverse bore with cleaning needle
0.18 mm dia.
2*
.,

_ --

:
I,

Longitudinal bore

Transverse bore

07.1 .lO-137/4
. . . 2..
A.. . . .

EXIT

Assembly

8 Assemble injection nozzle. Tightening torque for

iniection nozzle holder 70-80 Nm.

9 Check injection nozzle for function (07.1-135)

and adjust, if required (07.1-137).

Nozzle needle
Nozzle body
Nozzle holder element
Pressure pin
Injection nozzle holder lower part
Compression spring
Injection nozzle holder upper part
Steel disk for making adjustment

Adjusting

10 Add thicker or thinner disks depending on opening

pressure.

Thicker disk = increases opening pressure

Thinner disk = reduces opening pressure

Disks are available from 1 .O to 1.8 mm thick, in steps

of 0.05 to 0.05 mm. An increase of preload by 0.05
mm increases opening pressure by approx. 3.0 bar.

07.1 .lO-137/5
 EXIT

07.1-145 Checking fuel pump

Job no. of work units or standard texts and flat rates data 07-5700.

Test value

Delivery at min. 200 rpm (stop lever pushed) min. 200 ml/30 s

Special tools

TDC-impulse transmitter 601 589 04 21 00

Contact handle (for starting) 001 58946 21 08

Conventional tools

Digital tester e.g. Bosch, MOT 001.03

Measuring glass or measuring cup (min. 1 liter)

Stop watch

Testing

1 Connect digital tester (001) according to connection

diagram.

001 Digital tester

021 TDC-impulse transmitter

07.1.10-145/l
 EXIT

2 Di isconnect return 1flow Iline (E) and hold into

measrJring cup.

3 Move ignition lock into position ,,O, injection

pump will then be at ,,zero delivery.

4 Start motor for 30 seconds with separate starting

cable, with battery intact (10.0 V when starting)
a delivery quantity of min. 200 ml must be attained.
Renew delivery pump, if required.

07.1.10-14512
 EXIT

07.1-150 Checking vacuum shutoff for leaks

Job no. of work units or standard texts and flat rates data 07-8222.

Special tool

Vacuum tester 116 589 25 21 00

Function diagram

-61~

-6ld

1 Injection pump A Intermediate wall bl = blue

Vacuum control unit (stop) c Remaining consumers br = brown
6:b Orif ice 0.5 mm dia. e To brake unit
61 c Valve ignition starter switch
61d Cam disk ignition starter switch
67 Vacuum pump

07.1.10-150/l
 EXIT

Testing

1 Set ignition key on steering lock to position ,,2.

2 Pull suction line (brown) out of connection

(arrow).

3 Connect tester and activate with vacuum.

If readout on pressure gauge is not changing, the

valve for key starting system is tightly sealed.

If pressure gauge shows a vacuum drop, valve (61~)

on steering lock is leaking.

Attention!
Prior to exchanging valve for key-starting system
and the vacuum control unit of injection pump,
check hose lines and their connections.

4 Renew valve for key-starting system on steering

lock.

5 Turn ignition key on steering lock back to

PCbsition ,,O.

If pressure gauge shows a vacuum drop, the vacuum

control unit or the valve may be leaking.

6 In such a case, disconnect tester on suction line.

07.1.10-150/2
 EXIT

7 Pull control line (brown/blue) from connection

(arrow).

Layout standard version and @

@California version

8 Connect tester to connection and activate with

vacuum.

If pressure gauge shows a vacuum drop, the vacuum

control unit of injection pump is leaking.

Attention!
Prior to exchanging vacuum control unit, check hose
lines and their connections.

9 Renew vacuum control unit (07.1-220).

07.1 .lO-1!50/3
 EXIT

07.1-200 Removal and installation of injection pump

Job no. of work units or standard texts and flat rates data 07-8410.

Test value

injection timing (indirect), position of engine 15O after TDC cylinder 1

Tightening torques (reference values) Nm

Closing plug on regulator (measuring point) 30-35

Injection line 1 O-20

Injection pump flange 20-25

Central fastening bolt on injection timer 40-50

(lefthand threads)

Special tools

Torque wrench with plug-in ratchet, 001 589 66 21 00

1/2square, 25-l 30 Nm

Locking screw d&Z.-W73 601 589 05 21 00

Socket wrench element 27 mm, l/2 square 001 589 65 09 00

Box wrench element open, 14 mm, 000 589 77 03 00

l/2 square for injection lines

Serration wrench for rotating 601 589 09 08 00

injection pump

Removal and installation

1 Remove radiator shell and fan (20-335).

2 Completely remove air cleaner (09-400).

07.1 .lO-200/l
 EXIT

3 Rotate crankshaft in direction of rotation to 15O

after TDC of 1st cylinder.

4 Disengage belt tensioner (13-340).

5 Remove chain tensioner (05-310).

6 Connect injection and fuel lines to injection pump.

7 Pull vacuum lines from vacuum control unit for

idle speed increase, stop unit and vacuum control
valve, if required.

8 Disengage regulating linkage on adjusting lever.

9 Remove vacuum pump (43-610).

10 Loosen central fastening scr ew (19) (lefthand

thread), apply counterhold to CI rankshaft for this
purpose.

Attention!
LEFTHAND T H R E A D S

07.1.10-200/2
 EXIT

11 Unscrew fastening screws (arr*ows) and screw on

supporting holder.

12 Pull out injection pump toward the rear.

Installation notes

13 Check whether engine is at 15O after TDC of

first cylinder.

14 Remove closing plug (11).

07.1.10-200/3
 EXIT
15 Rotate injection pump with serration wrench (027)
on injection pump camshaft until lug of regulator
shows up on bore, slip in locking gauge (023) in this
position until gauge is noticeably engaging.

Attention!
Risk of damaging injection pump!
As soon as the injection pump is installed and tightened,
remove locking gauge.

16 Assemble engine.

Note: When the engine is started, the injection system

will automatically vent itself.

07.1 JO-200/4
 EXIT

07.1-210 Renewing delivery valve seal

Job no. of work units or standard texts and flat rates data 07-8627

Removal and installation of air cleaner (09-400).

7h

7i

7k

7f

79 1074-500612

7 Delivery valve holder . . . . . . . . . . . . . . . . . . . . . 35 Nm

7f Copper seal , . . . . . . . . . . . . . . . . . . . . . . . . . . . Renew
79 Delivery valve carrier . . . . . . . . . . . . . . . . . . . . . Note installation position
7h O-ring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Lubricate prior to installation.
7i Compression spring
7k Delivery valve

Special tool

Socket wrench element notched tooth 17 x 20, 617 589 01 09 00

l/2 square VOW-8541

07.1 .lO-210/l
 EXIT

07.1-220 Renewing vacuum control unit

Job no. of work units or standard texts and flat rates data 07-8618

Removal and installation of air cleaner (09-400).

t ~ 6b
W6a
6c

1 Injection pump
6 Vacuum control unit (stop). . . . . . . . . . . . . . . . Slightly lift during removal, tilt rearward toward engine
end and pull out
6a O-ring
6b Screw
6c Holder
25 Emergency stop lever. . . . . . . . . . . . . . . . . . . . During installation, push and let connecting rod of
vacuum control unit engage in rocker of emergency
stop lever

07.1.10-220/l
 EXIT

07.1-230 Removal and installation of injection nozzle

Job no. of work units or standard texts and flat rates data 07-6810.

30 Injection nozzle ...,. . . . . . . . . . . . . . . . . . . . 70-80 Nm, use special tool 001 589 65 09 00
50 Leak oil hose
51 Hose clamp (aonly)
52 Closing plug
53 Nozzle reed. . . . . . . . . . . . . . . . . . . . . . . . . . . Renew
54 Injection lines cylinder 1 . . . . . . . . . . . . . . . . . . lo-20 Nm (reference value)

07.1.10-230/l
 EXIT

07.1-235 Removal and installation of fuel pump

Job no. of work units or standard texts and flat rates data 07-5710.

Remove air cleaner cover (09-400).

1 Injection pump
3 Fuel pump. . . . . . . . . . . . . . . . . . . . . . . . . . . During removal, catch emerging engine oil
3a Gasket
3b Circlip, 2 each
3c Nut, 2 each
23 Pressure connection
82 Fuel filter inlet
84 Clamp
89 Suction line

07.1.10-235/l
 EXIT

07.1-240 Removal and installation of injection timer

Job no. of work units or standard texts and flat rates data 07-8014.

Tightening torque Nm

Central fastening screw on injection timer 40-50

(lefthand threads)

Special tools

Socket wrench element 27 mm, l/2 square 001 589 65 09 00

Torque wrench with plug-in ratchet, 001 589 66 21 00

l/2 square, 25-l 30 Nm

Impact puller 116589203300

Threaded bolt M 6 Sii$Q 11658901 3400

moL-6368

Note

Injection pump removed, remove and install injection

pump (07.1-200).

Removal and installation

1 Remove assembly basket.

2 Remove camshaft timing gear for slackening chain.

3 Pull out locking pin (arrow).

07.1.10-24011
 EXIT

4 Push timing chain in outward direction, slip in

sheet metal strip of approx. 0.2 mm for this purpose,
and pull out injection timer.

5 Install injection pump.

6 Check injection timing with digital tester

(07.1-l 12). adjust, if required (07.1-l 17).

07.1 .lO-240/2
. . . . . . ._ ._ ...............
EXIT

07.1-245 Renewing fuel filter

Job no. of work units or standard texts and flat rates data 07-5513.

Note

Fuel system will vent itself automatically when

starting, owing to higher delivery capacity of fuel
pump and throttles (orifices) in filter top, as well as
on injection pump.

Function diagram, refer to 07.1-010 section ,,G.

Removal and installation

tit 74
t.3
1 Disengage vacuum line on holder.

2 Loosen fastening screw (74) and remove filter (42)

in downward direction.

42 Filter 42
73 Fuel filter top
74 Screw
76 O-ring
77 Sealing ring (aluminum)

07.1.10-245/l