330B L Excavator 6DR00001-UP (MACHINE) POWERED BY 3306 Engine(SEBP2437...

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Producto: EXCAVATOR
Modelo: 330B L EXCAVATOR 6DR
Configuración: 330B L Excavator 6DR00001-UP (MACHINE) POWERED BY 3306 Engine

Pruebas y Ajustes
330B Excavator Hydraulic System
Número de medio -RENR3201-04 Fecha de publicación -01/03/2011 Fecha de actualización -25/03/2011

i00784800

Pressure Specifications
SMCS - 5050

Specifications
Note: A New specification is the performance that can be expected for a new machine. A Rebuild
specification is the performance that can be expected after rebuilding the components of a system.
Performance beyond Service Limit specifications is an indication of these problems: improper
adjustment, wear, damage of relief valves and damage of pumps.

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Illustration 1 g00340532

Relief valve locations

(A) Main

(B) Boom cylinder line (head end)

(C) Boom cylinder line (rod end)

(D) Stick cylinder line (head end)

(E) Stick cylinder line (rod end)

(F) Bucket cylinder line (head end)

(G) Bucket cylinder line (rod end)

(H) Swing (right)

(I) Swing (left)

(J) Left travel crossover relief valve for forward travel (upper valve)

(K) Left travel crossover relief valve for reverse travel (lower valve)

(L) Right travel crossover relief valve for forward travel (upper valve)

(M) Right travel crossover relief valve for reverse travel (lower valve)

(N) Pilot relief valve

(O) Main control valve

(P) Pilot manifold

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(Q) Travel motor (right)

(R) Travel motor (left)

(S) Swing motor

Table 1
Specifications Torque for
Relief Valve
New Rebuild Service Limit Locknut

(A) Main relief valve 34300 ± 490 34300 ± 490 kPa 32340 to 34790
50 ± 10 N·m
kPa (4950 ± 72 (4950 ± 72 psi) kPa (4700 to 5050
(37 ± 7 lb ft)
psi) psi)
(B) Boom cylinder
line (head end)
(C) Boom cylinder
line (rod end)
(D) Stick cylinder line
(head end) 36800 ± 1470 36800 ± 1470 33850 to 38270
20 ± 2 N·m (14
(E) Stick cylinder line kPa (5350 ± kPa (5350 ± 215 kPa (4920 to 5565
± 4 lb ft)
(rod end) 215 psi) psi) psi)

(F) Bucket cylinder

line (head end)
(G) Bucket cylinder
line (rod end)
(H) Swing relief
pressure (right) 29900 ± 980 29900 ± 980 kPa 27940 to 30880 160 ± 30 N·m
(I) Swing relief kPa (4350 ± (4350 ± 140 psi) kPa (4050 to 4475 (120 ± 22 lb ft)
pressure (left) 140 psi) psi)

(J) Left travel

crossover relief valve 36800 ± 1470 36800 ± 1470 33850 to 38270 130 ± 13 N·m
(forward) kPa (5350 ± kPa (5350 ± 215 kPa (4920 to 5565 (95 ± 10 lb ft)
215 psi) psi) psi)
(K) Left travel
crossover relief valve
(reverse)
(L) Right travel
crossover relief valve
(forward)

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(M) Right travel

crossover relief valve
(reverse)

(N) Pilot relief valve 4100 ± 200 kPa

4100 ± 200 kPa 4100 ± 200 kPa 16 ± 1 N·m (12
(595 ± 29 psi)
(595 ± 29 psi) (595 ± 29 psi) ± 1 lb ft)

Table 2
Required Tools
Part Number Description Qty
6V-2100 Multitach group 1
6V-4161 Hydraulic testing group 1
8T-0470 Thermometer group 1

Table 3
Relief Valves Pressure change With One Turn Of Adjustment Screw

Main valves
14400 kPa (2100 psi)

Line relief valve

11000 kPa (1600 psi)

Swing relief valve

11200 kPa (1625 psi)

Travel crossover relief valve

3050 kPa (440 psi)

Pilot relief valve

690 kPa (100 psi)

Preparation For Relief Valve Adjustment

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Illustration 2 g00363032

Pump Compartment

(1) Pressure tap (power shift pressure)

(2) Pressure tap (upper pump delivery pressure)

(3) Pressure tap (lower pump delivery pressure)

1. Position the machine on level ground.

2. Stop the engine.

3. Release the pressure in the hydraulic system. Refer to Testing And Adjusting, "Hydraulic
System Pressure - Release".

4. Connect a 60000 kPa (8700 psi) pressure gauge to pressure tap (2). Connect a 60000 kPa (8700
psi) pressure gauge to pressure tap (3) .

5. Connect a 4000 kPa (580 psi) pressure gauge to pressure tap (1) .

6. Start the engine.

7. Increase the hydraulic oil temperature to 55° ± 5°C (131° ± 9°F).

8. Place the machine controls at the following settings: Power Mode, engine speed dial "10" and
AEC switch OFF.

Reference: Make reference to Testing And Adjusting, "Operational Checks" for engine rpm settings.

Note: Normal operations of the engine and pumps are necessary for the pressure adjustments. If the
results of the pressure adjustment are not correct, then the engine and the pump characteristic curve
needs to be checked. Slow output flow from the pump is an indication of air in the hydraulic system.
Make sure that no air is present in the hydraulic system. Refer to Testing And Adjusting, "Hydraulic
System Pressure - Release".

Temporary Setting Of The Main Relief Valve

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Note: A temporary setting of the main relief valve is required before any line relief valve can be
adjusted.

Illustration 3 g00341013

Top of main control valve

(4) Adjustment screw

(5) Locknut

(6) Main relief valve

1. Open the bucket until the bucket cylinder rod is at the full retraction.

2. Be sure that the main relief valve pressure is set at 34300 ± 490 kPa (4950 ± 72 psi).

Note: Always make final pressure adjustments on pressure rise.

3. Loosen locknut (5). Turn the adjustment screw (4) clockwise for one half turn. Tighten locknut
(5) .

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