CATEGORY 3

TELEDYNE CONTINENTAL AIRCRAFT ENGINE

SB96-7C

SERVICE BULLETIN
Compliance Will Enhance Safety, Maintenance or Economy of
Operation

Technical Portions
FAA APPROVED

SUBJECT: TORQUE LIMITS

PURPOSE: This bulletin provides torque values for fasteners utilized on all TCM engines.
COMPLIANCE: During all maintenance, repair or overhaul events.
WARNING
Proper torqueing practices cannot be over emphasized. Torque values are
provided as a convenient method of achieving correct pre-loading of highly
stressed fasteners. If the fasteners are not properly plated, the fastener
threads are not clean and free of deformation or are not properly
lubricated, the correct fastener pre-load will not be achieved even though
the given torque value is reached. For this reason, it is critical that all
fasteners be inspected for proper plating, thread form and correctly
lubricated prior to torquing. Failure to verify a fastener's serviceability or
to correctly lubricate the fastener prior to assembly and torquing will result
in the fastener not being properly pre-loaded and subsequent failure of the
fastener may occur.
MODELS
AFFECTED: All
GENERAL INFORMATION
The torque values provided must be used for
the specific application. If an application is not
listed, then the general torque value must be used.
TORQUE VALUES LISTED ARE FOR USE
WITH CLEAN 50 WEIGHT AVIATION
ENGINE OIL APPLIED TO THE THREADS,
UNLESS OTHERWISE SPECIFIED. Refer to
appropriate manufacturers accessory overhaul
manuals for specified torque on accessories.
If cotter pin holes must be aligned, set torque
wrench at low limit and tighten nut to first hole
beyond this torque, but do not exceed the
maximum torque limit specified. This torquing
procedure must be followed for all applications
requiring cotter pin hole alignment, except for
ISSUED

connecting rod nuts. Special instructions are

provided in Notes at rear of bulletin.
NOTE: When you see the text notation (AR) it
refers to As Required.
WARNING
THE USE OF SEALANTS OR LUBRICANTS OTHER
THAN THOSE SPECIFIED BY TCM ON MATING
THREADS AND BETWEEN MATING SURFACES
CAN CAUSE INCORRECT TORQUE APPLICATION
AND SUBSEQUENT ENGINE DAMAGE OR
FAILURE.

REVISED

PAGE NO REVISION
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2005

PO BOX 90 MOBILE ALABAMA 36601 251-438-3411

SB96-7

2005 Teledyne Continental Motors, Inc.

A Teledyne Tec hnologies Company

CYLINDER TORQUE PROCEDURES:

Proper cylinder installation requires a multiple
step torquing process. Cylinder base stud threads,
through bolt threads and nuts must be lubricated
with clean 50 weight aviation oil. Through bolt
nuts at cadmium plated washers require a lower
torque value to achieve the same pre-load on the
through bolt since the lubricity of the cadmium
plating reduces the friction in the fastener joint.
1. Torque cylinder base nuts to 1/2 of the
specified torque value for the fastener.
2. Torque the cylinder through bolt nuts and
cylinder base stud nuts to the specified torque
value for the cylinder base stud nuts.
Through bolt nuts must be torqued on both
sides of the engine, even if only one cylinder
is being installed.
WARNING

3. Torque through bolt nuts, on both sides of the

engine, to the specified value for the fastener
4. Engines which incorporate the 7 th cylinder
deck stud, install the 7 th stud cylinder bracket
and conical stud nut. Torque the stud nut to
the value specified for the fastener.
NOTE: Through bolt nuts P/Ns 634505 and
649496 have been superseded by nut P/N 652541.
Nut P/N 634505 is a flanged 6 point (hex) nut
requiring a torque value of 690-710 inch pounds.
Nut P/N 649496 is a flanged 6 point (hex) nut
requiring a torque value of 790-810. Nut P/N
652541 is a flanged 12-point nut requiring a
torque value of 790-810 inch lbs. At engine
overhaul all P/N 634505 and 649496 flanged
through bolt nuts must be replaced with P/N
652541 flanged 12 point nuts. If replacing P/N
634505 or 649496 nuts in less that a complete set
prior to engine overhaul torque nut P/N 652541 to
the required valve of the original fastener (P/N
634505 or 649496).

Failure to torque through bolt nuts on

both sides of the engine can result in a
loss of main bearing crush with main
bearing shift and subsequent engine
failure.

ISSUED

REVISED

PAGE NO REVISION
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Teledyne Continental Motors, Inc.

2 of 13

02

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2005

PO BOX 90 MOBILE ALABAMA 36601 251-438-3411

SB96-7

A Teledyne Tec hnologies Company

CRANKCASE
CAUTION: The correct torque sequence from the latest version of the appropriate Overhaul
Manual must be followed for correct crankcase and cylinder assembly.
SIZE

FASTENER

TORQUE VALUE
IN/LB.
FT/LB.

MODELS AFFECTED

.25 - 28

Nut-Crankcase Flange

100-125

8.3-10.4

.25 - 28
.25 - 28

Nut-Tie bolt prop shaft cages

Nut-Engine leg bushing

90-110
90-100

7.5-9.2
7.5-8.3

.31 - 18

Bolt- Oil sump flange

155-175

12.9-14.6

.31 - 24

Nut- Crankcase Flange

180-220

15.0-18.3

.31 - 24

Nut-Crankcase flange
(Stainless Steel Only)
Nut-Crankcase through bolts
Nut-Magneto Flange
Nut-Shaft, magneto gear
support to case
Bolt-Engine mount to
crankcase.
Nut-Cylinder to crankcase
stud
Nut-Cylinder to Crankcase
studs

240-280

20.0-23.3

180-220
100-120
190-210

15.0-18.3
8.3-10.0
15.8-17.5

A, C, & E Series, O-200, O-300,

O-470(AR) IO-240, IOF-240
GO-300
C-125, C-145-, O-300
IO-346, O-470, IO-470,
GIO-470, TSIO-470, IO-520,
L&TSIO-520, GTSIO-520,
IOF-550, IO-550, TSIO-550,
TSIOL-550, TSIOF-550
IO-346, O-470(AR), IO-470,
GIO-470, TSIO-470, IO-520,
L&TSIO-520, GTSIO-520, IO550, IOF-550, TSIO-550,
TSIOF-550, TSIOL-550
(AR)
Stainless Steel Hardware Only
O-470 (AR), E-Series
All Engine Models
IO-360, L&TSIO-360

220-260

18.3-21.7

IO-550-G, IO-550-N

410-430

34.2-35.8

440-460

36.7-38.3

A, C, & E Series, O-200, O-300

GO-300, O-470
IO-240, IOF-240, IO-360,
L&TSIO-360,

.38 - 24

Nut-Crankcase tie bolts

370-390

30.8-32.5

.38 - 24
.38 - 24

Nut-Crankcase tie bolts

Nut-Crankcase through
bolts-front.
Nut-Crankcase though studs.

275-325
370-390

22.9-27.1
30.8-32.5

275-325

22.9-27.1

Nut-Mounting brackets to
crankcase
Bolt-Crankcase thru front
main only.
Nut-Through bolt, upper rear
Nut-Cyl. to crankcase
studs.(includes 7th stud)
Nut-Cyl. to crankcase studs.
Nut-Through bolts at
cadmium plated washer

275-325

22.9-27.1

A-Series, C-75, C-85, C-90 and

O-200.
All models(AR)

275-325.

22.9-27.1

GO-300

275-325
490-510

22.9-27.1
40.8-42.5

All 470's, All 520's, All 550's

All models (except TSIOL-550)

590-610
440-460

49.2-50.8
36.6-38.3

TSIOL-550
All models (AR)

.31 - 24
.31 - 24
.31 - 24
.38 - 16
.38 - 24
.38 - 24

.38 - 24
.38-24
.38-24
.38-24
.44-20
.44-20
.44-20

ISSUED

All models (AR) EXCEPT 360's

& IO-240 and IOF240
All 360's, IO-240, IOF240
O-470 (AR) & E-Series

REVISED

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02

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2005

PO BOX 90 MOBILE ALABAMA 36601 251-438-3411

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CRANKCASE (continued)
SIZE

FASTENER

.44-20

Nut-Crankcase tie bolts-nose

& below camshaft
Nut-Cyl. to crankcase
through studs
Nut- Front and Rear
Crankcase bearing thru studs
Nut-thru stud at Cyl. Flange
Nut-Tie bolts at nose and
prop shaft cages.
Nut-Through bolt at cylinder
flange

440-460

36.6-38.3

All models(AR)

400-450

33.3-37.5

A-Series, C-75, C-85 & C-90

490-510

40.8-42.5

O-200

490-510
340-360

40.8-42.5
28.3-30.0

O-200
GO-300.

490-510

40.8-42.5

.44-20

Nut-Through bolt at cylinder

flange

590-610

49.2-50.8

All models (AR) EXCEPT

360's,
IO-240, IOF-240
All 360's, IO-240, IOF-240

.50-20

Nut-Through bolt at cad

plated washer

615-635

51.2-52.9

.50-20

Nut-6 Point-Through bolt at

cylinder flange
(P/N 634505 .33 in. high)
Nut-Through bolt at plated
washers
Nut-12 Point-Thru bolt at
cylinder flange
(P/N 652541)
Nut-Tall 6 point-thru bolt at
cylinder flange.
(P/N 649496 .43 inch high)
Nut-Crankcase tie bolts-nose
Plug-(using crush washer)

690-710

57.5-59.2

690-710

57.5-59.2

TSIOL-550

790-810

65.8-67.5

IO-346, All 470, 520 & 550.

790-810

65.8-67.5

TSIOL-550.

640-660
190-210

53.3-55.0
15.8-17.5

All models(AR)
All models(AR)

.44-20
.44-20
.44-20
.44-20
.44-20

.50-20
.50-20
.50-20
.50-20
.62-18

TORQUE VALUE
IN/LB.
FT/LB.

MODELS AFFECTED

IO-346, O-470, IO-470

TSIO-470, IO-520, L/TSIO-520
GTSIO-520, IO-550, IOF-550,
TSIO-550, TSIOF-550, GIO470
IO-346, All 470, 520, 550,
(Except TSIOL-550)

GEARS
SIZE

FASTENER

TORQUE VALUE
IN/LB.
FT/LB.

.25-28

Bolt-Gear to camshaft

140-160

11.7-13.3

.25-28

Bolt-Gear to crankshaft (P/N

22532) (SEE NOTE 6)
Bolt-Gear to crankshaft. (P/N
534904) (SEE NOTE 6)
Bolt-Quill Shaft Retaining
Plate (P/N 646920)

140-160

11.7-13.3

170-175

14.2-14.6

90-110

7.5-9.2

.25-28
.25-28

.31-24

Bolt-Gear to camshaft

ISSUED

240-260

20.0-21.7

MODELS AFFECTED
A,C, & E-Series, O-200,O-300
O-470, IO-240, IOF-240
A & C-Series, O-200, O-300,
GO-300 , IO-240, IOF-240
E-Series, O-470 Numerical
O-470-A, E.
GTSIO-520
E-Series, IO-360, L/TSIO 360,
IO-346, O-470, IO-470, IOF-550
TSIO-470, IO-520, L/TSIO- 520
GTSIO-520, IO-550, TSIO-550,
TSIOL-550, TSIOF-550

REVISED

PAGE NO REVISION
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Teledyne Continental Motors, Inc.

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02

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2005

PO BOX 90 MOBILE ALABAMA 36601 251-438-3411

SB96-7

A Teledyne Tec hnologies Company

GEARS (continued)
SIZE

FASTENER

TORQUE VALUE
IN/LB.
FT/LB.

Bolt-Gear to crankshaft
(Lower hardness bolts
identified with green dykem)
(SEE NOTE 6)
Bolt-Gear to crankshaft.
(Bolt hardness RC 38-42)
(SEE NOTE 6).

.31-24

240-260

20.0-21.7

380-420

31.7-35.0

MODELS AFFECTED

E-Series, IO-360
L/TSIO-360, IO-346

.31-24

Bolt-Face gear to crankshaft.

140-150

11.7-12.5

.31-24

Nut-Generator or alternator
gear
Nut-Generator gear-(531231)
With washer-(401507)
Bolt-Vac & fuel pump gear
to camshaft

175-200

14.6-16.7

175-195

14.6-16.3

O-470, IO-470, TSIO-470,

IO-520, L/TSIO 520, IOF-550
GTSIO-520, IO-550, TSIO-550,
TSIOL-550, TSIOF-550
IO-346, GIO-470, IO-520(AR)
L/TSIO-520(AR), GTSIO-520,
IO-550, IOF-550, TSIO-550,
TSIOL- 550.
A, C & E Series, O-200,O-300
GO-300, IO-360, L&TSIO-360.
E-Series

275-325

22.9-27.1

IO-240, IOF-240

.31-24

.31-24
.31-24

CONNECTING RODS
SIZE

FASTENER

.38-24

Nut-Connecting rod (Nuts:

24804, 626140 with bolt P/N
530213) (SEE NOTES 1&8)

3/8-24
.38-24

TORQUE VALUE
IN/LB.
FT/LB.

Nut-Connecting rod (Nuts:

P/N 626140 with bolt P/N
35972)
(SEE NOTES 1 & 8)
Nut -Connecting rod
Spiralock (Nut P/N 654487
with bolt P/N 654693)
Nut -Connecting rod
Spiralock (Nut P/N 654487
with bolt P/N 654811)
Nut-Connecting rodSpiralock
(Nut hex P/N 643215 with
bolt P/N 643112)
Nut-Connecting rod
Spiralock (12 Point Nut P/N
654490)

3/8-24
.38-24
3/8 -24
.38-24
3/8 -24
.44-20
7/16-20
.44-20

400-475

33.3-39.6

400-475

33.3-39.6

490-510

40.8-42.5

490-510

40.8-42.5

550-600

45.8-50.0

690-710

57.5-59.2

7/16-20

ISSUED

MODELS AFFECTED
A & C-Series, O-200, O-240,
O-300, GO-300, IO-360,
L & TSIO-360, IO-240, IOF240
E-185, E-205, E-225, IO-346,
O-470 Numbered and Lettered
engines IO-470, TSIO-470 with
628751 Connecting Rod
O-200, 240, O-300, GO-300,
IO-240, IOF-240, IO-360, L &
TSIO-360
E-185, E-205, E-225, IO-346,
O-470 Numbered and Lettered
engines IO-470, TSIO-470
L & IO-520-P, L & TSIO-520
AE & CE, IO-550, IOF-550,
TSIO-550, TSIOF-550,
TSIOL-550
FOR SPECIFIC
APPLICATION
SEE NOTE 9 ON PAGE 13

REVISED

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Teledyne Continental Motors, Inc.

5 of 13

02

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2005

PO BOX 90 MOBILE ALABAMA 36601 251-438-3411

SB96-7

A Teledyne Tec hnologies Company

CONNECTING RODS (continued)

SIZE

FASTENER

.44-28

TORQUE VALUE
IN/LB.
FT/LB.

Nut-Connecting Rod (rod

P/N 646474, bolt P/N
631794 nut 631554) (SEE
NOTE 1)
Nut-Connecting Rod (rod
P/N 646476, bolt P/N
629340 nut-P/N 628109
(SEE NOTE 1)

7/16-28
.44-28
7/16-28

MODELS AFFECTED
GIO-470, GTSIO-520.

550-575

45.8-47.9

475-525

39.6-43.8

IO-346, O-470, IO-470,

TSIO-470, IO-520, TSIO-520
(except L/TSIO-520 AE & CE),

MISCELLANEOUS FUEL INJECTION

SIZE

FASTENER

#8-32

Screw-Manifold Cover hold

down (AN503-8-12)

#8-32
.125-27
.125-27
.19-24
.25-28
.25-48
.31-24
.31-24
.31-32
.50-24

TORQUE VALUE
IN/LB.
FT/LB.

MODELS AFFECTED

22-26

1.8-2.2

All fuel injected models, as

required

Screw-Aneroid body hold

down (AN500-8-14)
Fitting-Cover vapor
separator fuel pump
Nozzle-Fuel injector(with
anti-seize compound)
Through-bolt, fuel pump

17.5-22.5

1.5-1.9

60-80

5.0-6.7

55-65

4.6-5.4

29-31

2.4 -2.6

Ejector - Fuel Pump Vapor

Separator Cover
Nut-Aneroid stem jam

90-100

7.5-8.3

All fuel injected models, as

required
All fuel injected models, as
required
All fuel injected models, as
required
All fuel injected models, as
required
All fuel injected models (AR)

25-30

2.1-2.5

Nozzle-Fuel injector(with
anti-seize compound)
Nut- Throttle and mixture
control levers to shaft
Nut-Fuel injection line

55-65

4.6-5.4

100-120

8.3-10.0

40-45

3.3-3.7

Nut; Air reference sleeve

B nut to air reference line

.38-24

Nut-Fuel injection line

.62-18

Plug & Screen assy.

Metering Unit new gasket

ISSUED

Snug nut finger tight to

set seal between nut and
male connector, then
tighten additionl to 1
turn
55-60
4.5-5.0
120-130

10.0-10.8

All fuel injected models, as

required
All fuel injected models, as
required
All fuel injected models, as
required
All fuel injected models, as
required
All Turbocharged models
All fuel injected models, as
required
All fuel injected models, as
required

REVISED

PAGE NO REVISION
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Teledyne Continental Motors, Inc.

6 of 13

02

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2005

PO BOX 90 MOBILE ALABAMA 36601 251-438-3411

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MISCELLANEOUS LUBRICATION
SIZE

FASTENER

.25-20

Bolt-Oil cooler to adapter

.25-20

Bolt-Oil pump cover

crankcase
Nut-Collar assembly
governor oil transfer.

TORQUE VALUE
IN/LB.
FT/LB.

MODELS AFFECTED
IO-360, L/TSIO-360, O-470,
IO-470, TSIO-470, IO-520,
TSIO-520(AR), I0-550, IOF-550
TSIO-550 TSIOL-550, TSIOF550
All models as required

100-110

8.3-9.2

75-85

6.3-7.1

75-85

6.3-7.1

280-300

23.3-25.0

280-300

23.3-25.0

LTSIO-360 (Left Hand Thread)

190-210

15.8-17.5

All models, as required.

190-210

15.8-17.5

All models, as required.

.62-18
.62-18
.75-16
.75-16
.88-16

Tach-Shaft to oil pump drive

gear.
Tach-Shaft to oil pump drive
gear.
Plug-Oil cooler (using crush
washer)
Plug-Oil suction tube (using
crush washer)
Plug-Oil sump drain
Oil filter-Cartridge
Oil filter-Disposable type.
Plug-Oil sump drain.
Cap-Oil pressure relief valve

O-470, IO-470, TSIO-470,

IO- 520, TSIO-520, IO-550,
IOF-550, TSIO-550, TSIOL550, TSIOF-550
IO-360-D, TSIO-360

190-210
180-216
192-216
190-210
190-210

15.8-17.5
15.0-18.0
16.0-18.0
15.8-17.5
15.8-17.5

.88-16

Plug-Oil bypass.

240-260

20.0-21.7

1.00-14

Vernatherm-(Oil temperature
control valve)
Screen Assy-Scavenge oil

440-460

36.7-38.3

All models as required

All models as required
All models as required
IO-470-M, IO-520-E
O-200, IO-240, O-300,
TSIO-360, LTSIO-360.
O-470, IO-470, TSIO-470,
IO-520, TSIO-520, GTSIO-520
IO-550,, IOF-550, TSIO-550,
TSIOL-550, TSIOF-550
All models, as required.

200-210

16.7-17.5

Housing-Oil pressure relief

valve

240-260

20.0-21.7

Housing tach drive

250-350

20.8-29.2

Plug Special (Vernatherm)

Vernatherm.
Oil filter adapter lock nut

310-320
410-420
500-520

25.8-26.7
34.2-35.0
41.6-43.3

Oil filter screen using new

crush gasket ( install gasket
with parting line up against
screen face)

500-520

41.6-43.3

.25-28
.38-24
.38-24
LH Thread
.62-18
.62-18

1.00-18
1.12-18

1.375-16
LH Thread
1.25-18
1.25-18
1.75-16
1.75-16

ISSUED

O-300(AR), IO-360(AR),
L & TSIO-360(AR)
IO-346, O-470, IO-470, TSIO470, IO-520, TSIO-52O,GTSIO520, IO-550, IOF-550, TSIO550 TSIOL550, TSIOF-550
All models as required
All models as required
All models as required
O-300(AR), IO-360(AR),
L & TSIO-360(AR).
All models as required

REVISED

PAGE NO REVISION
TM

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DAY

06

11

YEAR
96

MO

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YEAR

Teledyne Continental Motors, Inc.

7 of 13

02

08

2005

PO BOX 90 MOBILE ALABAMA 36601 251-438-3411

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A Teledyne Tec hnologies Company

MISCELLANEOUS CYLINDER HARDWARE

SIZE

FASTENER

.125-27
.25-20

.25-20
.25-20
.25-20

Connector Cylinder Drain

Set Screw; Rocker shaft
locking
Screw- rocker box cover
(tighten 2 lower screws first)
Screw-Rocker box cover..
Screw-Intake flange.
Bolt-Rocker shaft hold down

.25-20
.25-28
.25-28

.25-20

.25-28
.31-18
.31-24

TORQUE VALUE
IN/LB.
FT/LB.
60-80
45-55

5.0-6.7
3.8-4.6

All Models (AR)

O-200, O-300

55-65

4.6-5.4

55-65
85-110
85-110

4.6-5.4
7.1-9.2
7.1-9.2

Bolt-Thru bolted rocker shaft

90-100

7.5-8.3

Nut-Rocker shaft hold down.

Nut-Exhaust coupling, V
band clamp (SEE NOTE 2).
Nut-Exhaust manifold
flange. (Spirotallic gasket)
Bolt-Rocker shaft.
(SEE NOTE 3).
Nut-Induction tube flange.

110-120
42

9.2-10.0

IO-240, IOF-240, IO-360, L & TSIO360

All models, as required
All models, as required.
O-470-2,4,13, 13A O-470B(AR)
O-470, IO-470, TSIO-470, IO-520,
IO-550 and IOF-550 (except G, N, P,
R), TSIO-520 (except BE), TSIOL550
All 360s, IO-240, IOF-240
TSIO-520-L, LB, TSIO-520-WB

100-110

8.3-9.2

190-210
50-70

15.8-17.5
4.2-5.8

.31-24

Bolt-Rocker shaft hold down

(SEE NOTE 4)

85-110

7.1-9.2

.31-24

Nut-Exhaust manifold flange

(Spirotallic gasket)
Plug Cylinder Drain (With
O-Ring)
Spark plug (SEE NOTE 7)

200-210

16.7-17.5

50-70

4.2-5.8

300-360

25.0-30.0

.44-20
18 MM

MODELS AFFECTED

All models, as required.

IO-550 and IOF-550 (G, N, P and R)
TSIO-520-BE, TSIO-550, GTSIO-520
All 360s, IO-240, IOF-240
O-470, IO-470 TSIO-470, IO-520, IO550, IOF-550 (except G, N, P, R),
TSIO-520 (except BE), TSIOL-550,
TSIOF-550
All models as required
TSIOL-550 Series
All models

MISCELLANEOUS FASTENERS
SIZE

FASTENERS

.25-.62
.25-.62

12-16
10-14

.3-1.3
.8-1.17

.38-16
.31-18
.31-18

Clamp, Hose, Oil Gage Rod

Clamp, Hose, Magneto
Pressurization
Bolt-Turbocharger to bracket
Bracket-Turbocharger
Bolt-Alternator mounting

310-350
220-250
150-180

25.8-29.2
18.3-20.8
12.5-15.0

.31-24

Nut, Generator Gear

175-200

14.6-16.7

.31-24

Nut, Generator Gear

(531231), washer (401507)
Nut; Starter Pinion Pivot &
Magneto Gear Support

175-195

14.6-16.3

TSIO-520-L1.
GTSIO-520-F & K
IO-346, GIO-470,
All 520's(AR), All 550's(AR).
A,C & E-Series, O-200, 0-300
GO-300, IO-360, TSIO-360
E-Series

180-220

15.0-18.3

PE & E-Series

.31-24

ISSUED

TORQUE VALUE
IN/LB.
FT/LB.

MODELS AFFECTED
IO-360, TSIO-360 (AR)
As Required

REVISED

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MISCELLANEOUS FASTENERS (continued)

SIZE

FASTENERS

TORQUE VALUE
IN/LB.
FT/LB.

.38-24

Nut-Starter to adapter

200-220

16.7-18.3

.44-20

600-720

50-60

.56-18

Nut-Alt. sheave to starter

shaft
Nut-Starter shaft gear.
(SEE NOTE 5)

450-500

37.5-41.6

.56-18

Nut-Starter jaw, crankshaft.

575-625

47.9-52.1

.56-18

Nut-Generator pulley drive

450-500

37.5-41.7

.62-32

Nut-Alternator hub
assembly.

300-450

25.0-37.5

450-500

37.5-41.7

Nut-Alternator or generator
pulley

.66-20
.75-16

Nut-Starter shaft gear

viscous dampener
Adapter-Tach reduction gear

.88-18

120-180

MODELS AFFECTED
O-300 (AR), GO-300 (AR),
IO-346, All 470s, All 520s All
550s
TSIO-520-B as required

180-220

IO-520-BA, BB,
TSIO-520-BB, N, NB, L, LB,
WB, BE UB, IO-550-B, C, IOF550 B,C TSIO-550-A, B, C, E
O-470 Numeral
IO-346, All 470s , IO-520,
TSIO-520, IO-550, IOF-550,
TSIOL-550 TSIO-550, TSIOF550
IO-346, GIO-470, IO-520(AR)
TSIO-520(AR), IO-550, IOF550, GTSIO-520 (AR), TSIOL550, TSIO-550, TSIOF-550
O-470, IO-470, IO-520 (AR),
TSIO-520 (AR), TIARA (AR)
IO-550, IOF-550, TSIOL-550,
TSIO-550.
GTSIO-520

10.0-15.0

All 360 series, IO-240, IOF-240

Pipe Plugs
Dec.
.062 - 27

SIZE
In.
1/16-27

TORQUE
IN/LB.
FT/LB.
30 - 40
2.5 - 3.3

.125 - 27

1/8-27

60 - 80

5.0 - 6.7

.250 - 18

1/4-18

130 - 150

10.8 - 12.5

.375 - 18

3/8-18

185 - 215

15.4 - 18.0

.500 - 14

1/2-14

255 - 285

21.3 - 23.8

.750 - 14

3/4-14

310 - 350

25.8 - 29.2

ISSUED

REVISED

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General Torque Specifications

Bolts, Nuts and Screws

Dec.
#2-56

SIZE
In.
-56

TORQUE
IN/LB.
FT/LB.
1.4-2.6
N/A

#4-40

-40

2.9-5.5

N/A

#6-32

-32

5.3-10.1

N/A

#8-32

-32

17.5 - 22.5

1.5 - 1.9

#10-32

-32

36 - 50

3.0 - 4.2

#10-24

-24

21 - 25

1.7 - 2.0

.25 - 20

1/4

75 - 85

6.3 - 7.1

.25 - 28

1/4-28

90 - 100

7.5 8.3

.3125 - 18

5/16-18

155 - 175

12.9 - 14.6

.3125 - 24

5/16-24

180 - 220

15.0 - 18.3

.375 - 16

3/8-16

220 - 260

18.3 - 21.7

.375 - 24

3/8-24

275 - 325

22.9 - 27.1

.44 - 20

7/16-20

400 - 450

33.3 - 37.5

.50 - 20

1/2-20

550 - 600

45.8 - 50.0

Driving Studs
SIZE

TORQUE
IN/LB.
FT/LB.
50 - 70
4.2 - 5.8

Dec.
.25 - 20

In.
1/4

.3125 - 18

5/16-18

100 - 150

8.3 - 12.5

.375 - 16

3/8-16

200 - 275

16.7 - 22.9

.44 - 14

7/16-14

300 - 425

25.0 - 35.4

ISSUED

REVISED

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HYDRAULIC LINE TORQUE SPECIFICATIONS

SIZE
.44-20
.56-18
.75-16

HOSE ASSEMBLY
Nut-Self locking #4 hose
Nut-Self locking #6 hose
Nut-Self locking #8 hose

TORQUE IN / LB.
115-165
185-335
360-570

MODELS
TSIO-520-L, LB, WB.
TSIO-520-L, LB, WB.
TSIO-520-L, LB, WB.

ASSEMBLY TORQUE SPECIFICATIONS FOR FITTING

SIZE
.31-24
.31-24
.38-24
.38-24
.44-20
.44-20
.44-24
.56-18
.56-18
.75-16
.75-16
.88-14
.88-14

FITTING & MATERIAL

#2 Brass / Aluminum
#2 Steel
#3 Brass / Aluminum
#3 Steel
#4 Brass / Aluminum
#4 Steel
Steel
#6 Brass / Aluminum
#6 Steel
#8 Brass / Aluminum
#8 Steel
#10 Brass / Aluminum
#10 Steel

TUBE O.D.
.125
.125
.188
.188
.250
.250
.190
.375
.375
.500
.500
.625
.625

TORQUE IN / LB.
15-30
15-30
40-65
50-90
60-80
70-120
60-80
75-125
90-150
150-250
135-250
200-350
300-400

MODELS
All Models (AR)
All Models (AR)
All Models (AR)
All Models (AR)
All Models (AR)
All Models (AR)
All Models (AR)
All Models (AR)
All Models (AR)
All Models (AR)
All Models (AR)
All Models (AR)
All Models (AR)

TORQUE SPECIFICATIONS FOR HOSE FITTINGS

(B NUTS)
HOSE SIZE
#2
(.31-24)
#2
(.31-24)
#3
(.38-24)
#3
(.38-24)
#4 (.4375-20)
#4 (.4375-20)
#5
(.500-20)
#5
(.500-20)
#6 (.5625-18)
#6 (.5625-18)
#8
(.750-16)
#8
(.750-16)
#10 (.875-14)
#10
(.875-14)
#12 (1.063-12)
#12 (1.063-12)

HOSE END FITTING MATERIAL

BRASS / ALUMINUM FITTING
STEEL FITTING
BRASS / ALUMINUM FITTING
STEEL FITTING
BRASS / ALUMINUM FITTING
STEEL FITTING
BRASS / ALUMINUM FITTING
STEEL FITTING
BRASS / ALUMINUM FITTING
STEEL FITTING
BRASS / ALUMINUM FITTING
STEEL FITTING
BRASS / ALUMINUM FITTING
STEEL FITTING
BRASS / ALUMINUM FITTING
STEEL FITTING

ISSUED

TORQUE IN / LB.
50-80
75-120
70-105
95-140
100-140
135-190
130-180
170-240
150-195
215-280
270-350
470-550
360-430
620-745
460-550
855-1055

REVISED

MODELS
All Models (AR)
All Models (AR)
All Models (AR)
All Models (AR)
All Models (AR)
All Models (AR)
All Models (AR)
All Models (AR)
All Models (AR)
All Models (AR)
All Models (AR)
All Models (AR)
All Models (AR)
All Models (AR)
All Models (AR)
All Models (AR)

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TORQUE VALUES FOR FADEC COMPONENTS

ALL FADEC ENGINES
Hardware
ECU 50-Pin Connector Securing Screws
SSA 25-Pin Connector Securing Screws
Fuel Pressure Sensors
Manifold Pressure Sensors
Cylinder Head Temp Sensor
Manifold Air Temp Adapter (Sensor Nut)
Manifold Air Temp Compression Fitting (Ferrule Nut)
Exhaust Gas Temperature Sensor Band Clamp
Lead To ECU Spark Tower B Nut

Torque (inch-lbs)
10-15
10-15
130-150
130-150
55-65
70-120
145-155
30-35
110-120

NOTES
NOTE (1) -

Torque to low limit. If cotter pin will not enter, increase torque gradually up to high limit
only. If cotter pin will not enter in this range, replace nut and repeat. IN NO CASE
SHALL NUTS BE TIGHTENED BELOW THE MINIMUM TORQUE LIMIT OR
OVER THE MAXIMUM TORQUE LIMIT. Reference the most current revision of
TCM Service Bulletin SIL 93-15 as applicable for special instructions for cotter pinning
the 360 model engine connecting rods.

NOTE (2) -

Strike outer periphery of coupling band lightly to distribute load. Then tighten to 50-60
in/lb. for P/N 641284 Clamp and 60-70 in/lb. for P/N 653832 Clamp.
Do not realign hex cap screw to suit tab washer.

NOTE (3) NOTE (4) -

Must be reworked to through bolt rocker shaft configuration in accordance with TCM
Service Bulletin M92-6 or current revision as applicable.

NOTE (5) -

Align and tension belt in accordance with TCM Service Bulletin M89-6 or current
revision as applicable.

NOTE (6) -

Crankgear must be heated to 300 Fahrenheit, then installed on crankshaft. Assure that
the gear seats tightly against the end of the crankshaft by tapping lightly with a brass
hammer.
CAUTION
Improper heating of the crankshaft gear will result in damage to the gear and may
lead to subsequent engine failure. The instructions contained in the latest revision of
the appropriate overhaul manual must be used for crankshaft gear installation.
Lubricate threads with Champion thread lubricant P/N 2612 or equivalent only.

NOTE (7) NOTE (8)-

(A) P/N 530184 connecting rod (Identified by forging number 530186), P/N A35159
(identified by forging number 5561) and P/N A35160 (also identified by forging number
5561) must be serviced as follows: P/N 530213 bolt, P/N 24804 or P/N 626140 Nut and
P/N 639292 cotter pin.

(B) P/N A36121 connecting rod assemblies utilizing the P/N 632041 forging must
be serviced in accordance with the part numbers indicated in the current technical
data. P/N A36121 connecting rod assemblies utilizing the P/N 40742 forging
ISSUED

REVISED

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must be serviced as follows: P/N 35972 connecting rod bolt, P/N 24804 nut and
P/N MS24665-132 cotter pin.
NOTE (9)

Connecting Rod Application:

ROD P/N 655000

Superseded by 655910
(Nut 654490 & Bolt 643112)
IO-520-P
LIO-520-P
TSIO-520-AE
LTSIO-520-AE
ROD P/N 655004
Superseded By 655910
(Nut 654490 & Bolt 654068)
Bolt 654068 Superseded To
Bolt 655961
O-470-J, R, S, U
IO-470-C, D, E, F, K, L, M,
N, S, U, V,
IO-520-A, BA, C, D, E, F, J,
K, L, M,
TSIO-520-A, B, C, D, E, G,
H, J, L, M, N, P, R, T
GTSIO-520-C, D, F, H, K, L,
M, N, R
ROD P/N 655910
(Nut 654490 & Bolt 655958)
O-470 J,R,S,U
IO-470 C,D,E,F,K,L,M,
N,S,U,V

IO-550-A, B, C, D, E, F, G,
L, N, P, R
TSIOL-550-A, B, C
TSIO-520-CE
TSIO-550A, B, C, E
ROD P/N 655005
Superseded By 655911
(Nut 654490 & Bolt 654068)
Bolt 654068 Superseded to
Bolt 655967
IO-520-BB, CB, MB,
TSIO-520-BB, BE, DB, EB,
JB, KB, LB, NB, UB, VB,
WB

ROD P/N 655911

(Nut 654490 & Bolt 655958)
IO-520-BB, CB, MB
TSIO520CE
TSIO-520-BB, BE, DB, EB,
JB, KB, LB, NB,UB, VB,WB

IO-520-A,BA,C,D,E,F,J,
K,L,M,P
L&TSIO-520-A,AE,B,C,D,
E,G,J,M,N,P,R,T
GTSIO-520-C,D,F,H,K,L,
M,N,R

ISSUED

ROD P/N 655001

Superseded by 655911
(Nut 654490 & Bolt 643112)

IOF-550-ALL
TSIO-550-A,B,C,E
TSIOL-550-A,B,C
TSIOF-550-ALL

ROD P/N 655003

SETOF 6 BALANCED P/N
655004 Con-Rods
Superseded by 655913
(Nut 654490 & Bolt 643112
IO-550-B, C
Special Edition Only
ROD P/N 655007
(SETOF 6 BALANCED P/N
655005 Con-Rods)
Superseded By 655913 (Nut
654490 & Bolt 654068)
Bolt 654068 Superseded By
Bolt 655961
TSIO-520-UB Special Edition

ROD P/N 655913

(SETOF 6 BALANCED P/N
655911 Con-Rods)
(Nut 654490 & Bolt 655958)
IO-550-B,C,D,F,G,N Special
Edition, Platinum
TSIO-520-UB Special Edition,
Platinum
IOF-550-B,C,N Platinum

REVISED

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2005

PO BOX 90 MOBILE ALABAMA 36601 251-438-3411

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