TM 10-3930-675-24-2
HYDRAULIC SYSTEM TEST POINT PROCEDURES - CONTINUED
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TEST POINT NO. 9: SERVO SYSTEM
NOTE
Test point no. 9 provides a means to check the servo system operating pressure.
1.
Connect hydraulic test gage to test point no. 9.
2.
Start engine. Pressure will be 435 psi (30 bar).
3.
Shut engine off. Turn ignition on. Exercise joystick. Turn ignition off.
4.
Disconnect hydraulic test gage from test point no. 9.
TEST POINT NO. 10: CAB LIFT MAIN VALVE
NOTE
Test point no. 10 provides a means to check the cab lift operating pressure.
1.
Remove handrail from mounted position.
2.
Connect hydraulic test gage to test point no. 10.
3.
Turn ignition on, but DO NOT start engine. Turn on auxiliary pump.
4.
Raise cab transport lift and hold.
5.
Pressure will build to 1,595 psi (110 bar).
6.
Lower cab transport lift.
7.
Turn auxiliary pump off. Turn ignition off.
8.
Reinstall handrail.
9.
Disconnect hydraulic test gage from test point no. 10.
TEST POINT NO. 11: TOPHANDLER/BOOM FOLDING SYSTEMS
NOTE
Test point no. 11 provides a means to check tophandler and boom folding system operating pressure.
1.
Connect hydraulic test gage to test point no. 11.
2.
Start engine. Pressure will be 260 psi (18 bar). After 5 seconds, pressure will jump to 3,045 psi (210 bar).
3.
Shut engine off. Disconnect hydraulic test gage from test point no. 11.
TEST POINT NO. 12: ENGINE DRIVEN PUMP/FAN HYDRAULIC SYSTEM
WARNING
The engine will be operated at full throttle during the test: DO NOT stand or sit around the front of
the engine while performing this test. Keep hands and objects away from the engine drive belts. Fail-
ure to follow this warning may result in serious injury to personnel.
CAUTION
The engine should be at operating temperature before performing this test. Operating a cold engine at
full throttle may result in premature wear or damage to the engine.
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