TM 5-2410-241-23-1
0034
PILOT PRESSURE TESTS AND ADJUSTMENTS
00034
1. Open door (Figure 1, Item 4) on machine (TM 5-2410-241-10).
2. Remove protective cap (Figure 1, Item 8) from pilot pressure port (Figure 1, Item 9).
3. Install coupler (Figure 1, Item 5) on pilot pressure gauge (Figure 1, Item 3).
4. Connect hose (Figure 1, Item 1) on coupler (Figure 1, Item 5) and pilot pressure port (Figure 1, Item 9).
5. Ensure parking brake is engaged and implement lockout switch is in OFF position (TM 5-2410-241-10).
6. Start machine and allow it to run for 15 minutes to reach normal operating temperature (TM 5-2410-241-10).
7. Set machine to HIGH IDLE (RABBIT MODE) on the throttle switch (TM 5-2410-241-10).
8. Pilot pressure gauge (Figure 1, Item 3) should read 450500 psi (3,1003,450 kPa). Record pressure readings
on gauge.
9. Set machine to LOW IDLE (TURTLE MODE) on the throttle switch (TM 5-2410-241-10).
a. If pressure is not within specified range, proceed to step 10.
b. If pressure is within specified range, proceed to step 16.
10. Hold adjustment screw (Figure 1, Item 6) and loosen nut (Figure 1, Item 7) on control manifold (Figure 1,
Item 2).
11. If pilot pressure is too high, turn adjustment screw (Figure 1, Item 6) counterclockwise to decrease pilot pres-
sure.
12. If pilot pressure is too low, turn adjustment screw (Figure 1, Item 6) clockwise to increase pilot pressure.
13. Hold adjustment screw (Figure 1, Item 6) and tighten nut (Figure 1, Item 7) on control manifold (Figure 1,
Item 2). Tighten nut to 144 in-lb (16 Nm)
14. Set machine to HIGH IDLE (RABBIT MODE) on the throttle switch (TM 5-2410-241-10).
15. Pilot pressure gauge should read 450500 psi (3,1003,450 kPa). Record pressure readings on gauge. If pilot
pressure will not adjust to specified range, perform the following:
a. If pilot pressure is ABOVE 450500 psi (3,1003,450 kPa) and cannot be adjusted down, replace control
manifold (WP 0216).
b. If pilot pressure is BELOW 450500 psi (3,1003,450 kPa) and cannot be adjusted up, perform implement
pump discharge pressure tests (WP 0033).
(1) If implement pump discharge pressures are within specified range, replace control manifold
(WP 0216).
(2) If implement pump discharge pressures are NOT with in specified range, replace implement pump
(WP 0112).
16. Set machine to LOW IDLE (TURTLE MODE) on the throttle switch (TM 5-2410-241-10).
17. Turn ignition switch and battery disconnect switch to OFF position. (TM 5-2410-241-10).
18. Remove test equipment from machine.
19. Install protective cap (Figure 1, Item 8) on pilot pressure port (Figure 1, Item 9).
20. Close door (Figure 1, Item 4) on machine (TM 5-2410-241-10).
0034-2