330D Forest Machine Hydraulic System Caterpillar

Test

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".

Show/hide table



Illustration 1	g01266656
Pump compartment (1) Pressure tap (delivery pressure for drive pump) (2) Pressure tap (delivery pressure for idler pump) (3) Pressure tap (power shift pressure)

4. Connect a 60000 kPa (8700 psi) pressure gauge to pressure tap (1) .

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

6. Connect a 6000 kPa (870 psi) pressure gauge to pressure tap (3) . This is used to monitor power shift pressure.

7. Start the engine.

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

Show/hide table



Illustration 2	g01186552
Monitor (A) Display (B) Keypad (C) Up key (D) Left key (E) Down key (F) Right key (G) Back key (H) Home key (I) OK key (J) Menu key

9. Start Service Mode and input a fixed power shift pressure. Refer to Table 2 for the correct pressure setting of each hydraulic circuit.

   1. Press menu key (J) .

      Note: Make sure that the engine speed dial is set correctly. Refer to Table 2 for the correct setting.

      Note: If more than thirty seconds pass between pushing the keys on the keypad, the menu mode will be cancelled and the previous display will be restored to message display (A) .

   2. Press right key (F) in order to highlight "SERVICE" menu option.

   3. After the "SERVICE" option is highlighted, press OK key (I) .
   Show/hide table
   
   

   Illustration 3	g01148206

   4. After OK key (I) is pressed, the screen in Illustration 3 will be displayed. The password for the service menu is "FFF2". The keys for direction are used to input the password. Press left key (D) or right key (F) in order to change the position of the flashing character. Press OK key (I) in order to enter the highlighted character.

   5. After entering the last letter of the password, the monitor will continue with the "SERVICE" screen.

   6. Repeatedly press down key (E) in order to highlight the "DEVICE TEST" line on the display.

   7. After the "DEVICE TEST" line is highlighted, press OK key (I) .

   8. Once the "DEVICE TEST" screen is displayed, press down key (E) until "POWER SHIFT PRES" appears on the display.

   9. When "POWER SHIFT PRES" is highlighted, press OK key (I) .

   10. Set the engine speed dial to the correct setting. Refer to Table 2.

       Note: Press OK key (I) within 5 seconds after completion of Step 9.j.

   11. The "POWER SHIFT PRES" will now be displayed. Line 4 of the display will now change to a numeric value. These characters represent the power shift pressure (kPa).

   12. Press left key (D) or right key (F) in order to increase or decrease the numeric value that is displayed on line 4 of the display. Pressing left key (D) decreases the power shift pressure. Pressing right key (F) increases the power shift pressure.

       Note: The value for power shift pressure on the monitor may not always match the pressure reading on the pressure gauge. Adjust the value on the monitor until the desired power shift pressure is attained on the pressure gauge that is connected to the pressure tap for power shift pressure. Make sure that the actual power shift pressure on the pressure gauge is correct for each hydraulic circuit. Refer to Table 2 for the correct power shift pressure.

       Note: To prevent a change in power shift pressure during the relief valve adjustment, do not exit the "DEVICE TEST" screen and do not turn the engine start switch to the OFF position.

       Note: Refer to Systems Operation, "Monitoring System" for additional information on Service Mode.

10. The pressure settings for all cylinders and the rotator motor are shown in Table 2.

Illustration 4	g01653133
Main control valves (front view) (4) Line relief valve (boom cylinder rod end) (5) Line relief valve (heel cylinder head end) (6) Line relief valve (grapple cylinder head end) (7) Line relief valve (stick cylinder rod end) (8) Line relief valve (heel cylinder rod end) (9) Line relief valve (grapple cylinder rod end) (10) Boom drift reduction valve (11) Line relief valve (boom cylinder head end) (12) Line relief valve (stick cylinder head end) (13) Stick drift reduction valve

The following line relief valves are located on top of the main control valve: boom cylinder rod end, heel cylinder head end, stick cylinder rod end and grapple cylinder head end. The following line relief valves are located on the bottom of the main control valve: boom cylinder head end, heel cylinder rod end, stick cylinder head end and grapple cylinder rod end.

Illustration 5	g00671871
Main control valve (bottom view) (10) Boom drift reduction valve (11) Line relief valve (boom cylinder head end)

Line relief valve (11) (boom cylinder head end) is located on boom drift reduction valve (10) .

Illustration 6	g00671874
Main control valve (bottom view) (12) Line relief valve (stick cylinder head end) (13) Stick drift reduction valve

Line relief valve (12) (stick cylinder head end) is located on stick drift reduction valve (13) .

Illustration 7	g01201790
Line relief valve (typical example) (14) Locknut (15) Adjustment screw

Note: Turn adjustment screw (15) clockwise in order to increase the pressure. Turn adjustment screw (15) counterclockwise in order to decrease the pressure.

Note: After relief valve adjustments, cancel Service Mode.

Note: Return the main relief valve pressure to the specified setting after testing and adjusting any line relief valve. Refer to Testing and Adjusting, "Relief Valve (Main) - Test and Adjust" for the main relief valve pressure setting.

Adjustment (Boom Cylinders)

Note: Make sure that the engine speed dial and the power shift pressure for the BOOM RAISE hydraulic circuit is set correctly. Refer to Table 2 for the correct setting.

1. To adjust the line relief valve pressure setting of the boom cylinder head end, move the joystick for the boom until the boom is at the full BOOM RAISE position (full extension of boom cylinders). Hold the joystick for the boom in this position.

2. Check the pressure in the boom cylinder head end on the pressure gauge at pressure tap (1) .

3. Return the joystick for the boom to the NEUTRAL position.

4. Refer to Table 2. If the pressure gauge reading at pressure tap (1) is not within the specification, adjust line relief valve (11) .

5. In order to adjust line relief valve (11) , loosen locknut (14) on the boom line relief valve. Turn adjustment screw (15) until the pressure gauge reading at pressure tap (1) is within the specification. Refer to Table 2.

   Note: Always make final pressure adjustment on pressure rise.

6. Tighten locknut (14) to 20 ± 2 N·m (15 ± 1 lb ft) on line relief valve (11) .

Note: In order to adjust the line relief valve pressure setting for the boom cylinder rod end, a temporary adjustment of the line relief valve for the rod end of heel cylinder must be performed.

Note: Make sure that the engine speed dial and the power shift pressure for the BOOM DOWN hydraulic circuit is set correctly. Refer to Table 2 for the correct setting.

7. Loosen locknut (14) on the line relief valve for the HEEL CLOSE function. Turn adjustment screw (15) by one quarter turn in a clockwise direction. Tighten locknut (14) on the line relief valve for the heel cylinder.

8. Move the joystick for the heel until the heel is at the full HEEL CLOSE position (full retraction of the heel cylinder). Hold the joystick for the heel in this position. At the same time, move the joystick for the boom until the boom is at the full BOOM DOWN position (full retraction of boom cylinders). Hold the joystick for the boom in this position.

9. Check the pressure in the boom cylinder rod end on the pressure gauge at pressure tap (1) .

10. Return the joystick for the boom to the NEUTRAL position.

11. If the pressure gauge reading at pressure tap (1) is not within the specification, adjust line relief valve (7) . Refer to Table 2.

12. In order to adjust line relief valve (7) , loosen locknut (14) on the boom line relief valve. Turn adjustment screw (15) until the pressure gauge reading at pressure tap (1) is within the specification. Refer to Table 2.

    Note: Always make final pressure adjustment on pressure rise.

13. Tighten locknut (14) to 20 ± 2 N·m (15 ± 1 lb ft) on line relief valve (7) .

14. After completion of line relief valve adjustment for the boom cylinders, return the line relief valve pressure setting of the heel to the specified pressure setting.

Note: If an appropriate location is not available to fully extend the boom cylinders, exchange the functions of the boom line relief valves. Remove the line relief valve for the boom cylinder head end and the line relief valve for the boom cylinder rod end from the main control valve. Exchange the location of the line relief valves. Adjust the pressure of the boom line relief valve that is now attached in the head end. After completion of line relief valve adjustment, return the respective line relief valves to the original locations.

Adjustment (Stick Cylinder)

Note: Make sure that the engine speed dial and the power shift pressure for the STICK OUT hydraulic circuit is set correctly. Refer to Table 2 for the correct setting.

1. To adjust the line relief valve pressure setting of the stick cylinder rod end, move the joystick for the stick until the stick is at the full STICK OUT position (full retraction of stick cylinder). Hold the joystick for the stick in this position.

2. Check the pressure in the stick cylinder rod end on the pressure gauge at pressure tap (2) .

3. Return the joystick for the stick to the NEUTRAL position.

4. If the pressure gauge reading at pressure tap (2) is not within the specification, adjust line relief valve (12) . Refer to Table 2.

5. In order to adjust line relief valve (12) , loosen locknut (14) on the stick line relief valve. Turn adjustment screw (15) until the pressure gauge reading at pressure tap (2) is within the specification. Refer to Table 2.

   Note: Always make final pressure adjustment on pressure rise.

6. Tighten locknut (14) to 20 ± 2 N·m (15 ± 1 lb ft) on line relief valve (12) .

Note: Make sure that the engine speed dial and the power shift pressure for the STICK IN hydraulic circuit is set correctly. Refer to Table 2 for the correct setting.

7. To adjust the line relief valve pressure setting of the stick cylinder head end, move the joystick for the stick until the stick is at the full STICK IN position (full extension of stick cylinder). Hold the joystick for the stick in this position.

8. Check the pressure in the stick cylinder head end on the pressure gauge at pressure tap (2) .

9. Return the joystick for the stick to the NEUTRAL position.

10. If the pressure gauge reading at pressure tap (2) is not within the specification, adjust line relief valve (9) . Refer to Table 2.

11. In order to adjust line relief valve (9) , loosen locknut (14) on the stick line relief valve. Turn adjustment screw (15) until the pressure gauge reading at pressure tap (2) is within the specification. Refer to Table 2.

    Note: Always make final pressure adjustment on pressure rise.

12. Tighten locknut (14) to 20 ± 2 N·m (15 ± 1 lb ft) on line relief valve (9) .

Adjustment (Heel Cylinder)

1. To adjust the line relief valve pressure setting of the head end of the heel cylinder, move the joystick for the heel until the heel is at the full HEEL OPEN position (full extension of heel cylinder). Hold the joystick for the heel in this position.

2. Check the pressure in the head end of the heel cylinder on the pressure gauge at pressure tap (1) .

3. Return the joystick for the heel to the NEUTRAL position.

4. Loosen locknut (14) on the line relief valve for the heel. Turn adjustment screw (15) until the pressure gauge reading at pressure tap (1) is within the specification. Refer to Table 2.

5. To adjust the line relief valve pressure setting of the rod end of the heel cylinder, move the joystick for the heel until the heel is at the full HEEL CLOSE position (full retraction of heel cylinder). Hold the joystick for the heel in this position.

6. Check the pressure in the rod end of the heel cylinder on the pressure gauge at pressure tap (1) .

7. Return the joystick for the heel to the NEUTRAL position.

8. Loosen locknut (14) on the line relief valve for the heel. Turn adjustment screw (15) until the pressure gauge reading at pressure tap (1) is within the specification. Refer to Table 2.

9. After completion of line relief valve adjustment, tighten locknut (14) .

Note: Turning adjustment screw (15) clockwise increases the pressure. Turning adjustment screw (15) counterclockwise decreases the pressure.

Note: Always make final pressure adjustment on pressure rise.

Adjustment (Grapple Cylinders)

1. To adjust the line relief valve pressure setting of the grapple cylinder rod end, move the switch on the right joystick backward until the grapple is at the full GRAPPLE OPEN position (full retraction of the grapple cylinders). Hold the switch in this position.

2. Check the pressure in the grapple cylinder rod end on the pressure gauge at pressure tap (1) .

3. Release the switch on the right joystick.

4. Loosen locknut (14) on the line relief valve for the grapple. Turn adjustment screw (15) until the pressure gauge reading at pressure tap (1) is within the specification. Refer to Table 2.

5. After completion of line relief valve adjustment, tighten locknut (14) .

6. To adjust the line relief valve pressure setting of the head end of the grapple cylinder, move the switch on the right joystick forward until the grapple is at the full GRAPPLE CLOSE position (full extension of the grapple cylinders). Hold the switch in this position.

7. Check the pressure in the head end of the grapple cylinder on the pressure gauge at pressure tap (1) .

8. Release the switch on the right joystick.

9. Loosen locknut (14) on the line relief valve for the grapple. Turn adjustment screw (15) until the pressure gauge reading at pressure tap (1) is within the specification. Refer to Table 2.

10. After completion of line relief valve adjustment, tighten locknut (14) .

    Note: Turning adjustment screw (15) clockwise increases the pressure. Turning adjustment screw (15) counterclockwise decreases the pressure.

    Note: Always make final pressure adjustment on pressure rise.

Adjustment (Grapple Rotate Motor)

Illustration 8	g01663014
Grapple (16) Line (17) Line (18) Grapple

1. Disconnect line (16) and line (17) from the connectors on grapple (18) .

2. Install 6V-8398 O-Ring Seal and 6V-9509 Face Seal Plug in the open end of lines (16) and (17) .

3. Install 6V-8398 O-Ring Seal and 6V-9830 Cap on the open connectors.

Show/hide table



Illustration 9	g01663015
Swing motor compartment (top view) (19) Rotator valve (20) Pressure tap (medium pressure) (21) Relief valve adjustment screw

4. Press the right side of the rocker switch in order to rotate the grapple in a clockwise direction. Hold the switch in this position.

5. Check the line relief valve pressure setting for the grapple rotate motor on the pressure gauge at pressure tap (20) .

6. Release the rocker switch.

7. Turn adjustment screw (21) until the pressure gauge reading at pressure tap (20) is between 9990 kPa (1449 psi) and 10680 kPa (1549 psi).

8. Press the left side of the rocker switch in order to rotate the grapple in a counterclockwise direction. Hold the switch in this position.

9. Check the line relief valve pressure setting for the grapple rotate motor on the pressure gauge at pressure tap (20) .

10. Release the rocker switch.

11. Turn adjustment screw (21) until the pressure gauge reading at pressure tap (20) is between 9990 kPa (1449 psi) and 10680 kPa (1549 psi).

    Note: Turning adjustment screw (21) clockwise increases the pressure. Turning adjustment screw (21) counterclockwise decreases the pressure.

    Note: Always make final pressure adjustment on pressure rise.