1090 Series II, 1190 Series II, 1190T Series II and 1290T Series II Track Feller Bunchers Machine Systems Caterpillar

Show/hide table

Personal injury can result from contact with hot hydraulic oil and from contact with hydraulic oil that is under high pressure. Hydraulic oil pressure can remain in the hydraulic system after the engine has been stopped. The hydraulic oil pressure must be released before any service on the hydraulic system is performed or serious personal injury could occur. Verify that all of the work tools have been completely lowered to the ground. Release the hydraulic oil pressure at the hydraulic tank through the breaker relief valve when the breaker relief valve is cool enough to touch with your bare hand. Verify that the hydraulic oil is cool before you begin to remove any hydraulic components or hydraulic lines.

Note: Use the information in the reference to prepare the machine for this test. Also, use the information in the reference to relieve any system pressure that may be present in the hydraulic system.

ReferenceFor the correct procedure to prepare the machine for this test, refer to Testing and Adjusting, "Machine Preparation for Troubleshooting" for the machine that is being serviced.

ReferenceFor the correct procedure to relieve any hydraulic oil pressure that may be present in the hydraulic system, refer to Testing and Adjusting, "System Pressure - Release" for the machine that is being serviced.

Preparation for Test

1. Place the machine on level ground.

Show/hide table



Illustration 1	g01162235
Location of the switch for the hood

Show/hide table



Illustration 2	g01074453

2. Open the hood for the engine compartment.

   Note: The switch for the hood is located on the right hand console.

3. Shut off the engine.

4. Release all the system hydraulic pressure. For information on the correct procedure to release pressure, refer to the reference at the beginning of this test.

Show/hide table



Illustration 3	g01078274
Location of the pilot manifold

Show/hide table



Illustration 4	g01229089
The solenoid for the swing parking brake is located on the pilot manifold. (S/N: BZJ1-2109BZK1-2159BZL1-2209BZM1-2259)

Show/hide table



Illustration 5	g01376148
The solenoid for the swing parking brake is located on the pilot manifold. (S/N: BZJ2110-UpBZK2160-UpBZL2210-UpBZM2260-Up)

5. Disconnect the wire from the solenoid for the swing parking brake. Refer to Illustration 4 or Illustration 5.

Show/hide table



Illustration 6	g01078276
Location of the implement control valve

Show/hide table



Illustration 7	g01078280
The main relief valve on the implement control valve

6. A temporary setting of the main relief valve on the travel control valve is required before you perform the test procedure.

Show/hide table



Illustration 8	g01078284
Main hydraulic pumps (1) Pressure tap for implement pump (2) Implement pump

7. Attach the 198-4240 Digital Pressure Indicator to pressure tap (1) .

8. Start the engine.

9. Move the hydraulic lockout to the UNLOCKED position.

   Move the engine speed dial to high idle. Raise the boom to the STALLED position.

10. Loosen the locknut on the main relief valve of the implement control valve. Turn the adjustment screw clockwise until the pressure gauge reads 35500 ± 690 kPa (5150 ± 100 psi). This will allow the line relief valves of the swing motor to actuate before the main relief valve.

11. Tighten the locknut on the main relief valve.

12. Shut off the engine

Show/hide table



Illustration 9	g01078290
Flow limiters for the swing control valve on the implement control valve (A) Signal limiter valve CLOCKWISE (B) Signal limiter valve COUNTERCLOCKWISE

13. Turn signal limiter valves (A) and (B) until the flow limiters bottom out on the swing control valve.

Test

1. Start the engine.

2. Increase the hydraulic oil temperature to 55° ± 5°C (130° ± 10°F).

3. Move the engine speed dial to high idle.

Show/hide table



Illustration 10	g01162811
Hydraulic lockout control

4. Move the hydraulic lockout control to the UNLOCKED position.

5. Slowly move the left joystick control for a full RIGHT swing operation. Read the pressure gauge. Slowly move the left joystick control for a full LEFT swing operation. Read the pressure gauge. The pressure should be 32000 ± 205 kPa (4640 ± 30 psi) in both directions.

6. Move the left joystick control to the HOLD position.

7. If the pressure is correct proceed to Step 18. If the pressure for the RIGHT swing is incorrect proceed to Step 8 in order to adjust the relief valve. If the pressure for the LEFT swing is incorrect proceed to Step 12 in order to adjust the relief valve.

Show/hide table



Illustration 11	g00934868
Swing motor (3) Swing motor (4) Relief valve (swing left) (5) Relief valve (swing right)

Show/hide table



Illustration 12	g01078314
(6) Adjustment screw (7) Locknut

8. Loosen locknut (7) on relief valve (5). Slowly move the left joystick control for a full RIGHT swing operation.

9. Turn adjustment screw (6) clockwise in order to increase the pressure. Turn adjustment screw (6) counterclockwise in order to decrease the pressure.

10. Adjust the pressure to 31025 ± 205 kPa (4500 ± 30 psi). Move the left joystick control to the HOLD position.

    Note: Always make final pressure adjustment on the pressure rise.

11. Tighten locknut (7) .

Show/hide table



Illustration 13	g00934868
Swing motor (3) Swing motor (4) Relief valve (swing left) (5) Relief valve (swing right)

Show/hide table



Illustration 14	g01078314
(6) Adjustment screw (7) Locknut

12. Loosen locknut (7) on relief valve (4). Slowly move the left joystick control for a full LEFT swing operation.

13. Turn adjustment screw (6) clockwise in order to increase the pressure. Turn adjustment screw (6) counterclockwise in order to decrease the pressure.

14. Adjust the pressure to 32000 ± 205 kPa (4640 ± 30 psi). Move the left joystick control to the HOLD position.

    Note: Always make final pressure adjustment on the pressure rise.

15. Tighten locknut (7) .

16. Readjust flow limiters (A) and (B) on the swing control valve to 30300 ± 480 kPa (4395 ± 70 psi).

17. Readjust the main relief valve to 35500 ± 690 kPa (5150 ± 100 psi).

18. Move the engine speed dial to low idle. Shut off the engine.

19. Release all the system hydraulic pressure.

20. Remove the test equipment.

21. Reconnect the wire to the solenoid for the swing parking brake.