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Page Title:
FOUR VALVE BANK FUNCTIONS (SWING, LIFT, TELESCOPE AND HOIST) DO NOT OPERATE OR OPERATE SLOWLY. (Cont) |
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 TM 9-2320-364-34-1
4. FOUR VALVE BANK FUNCTIONS DO NOT OPERATE OR OPERATE SLOWLY (CONT).
3.
TEST OPTIONS
KNOWN INFO
Operation test.
Unit Troubleshooting
Do functions operate with
tasks completed.
assistant holding LH or RH
REASON FOR QUESTION
Outriggers operate.
O/R JACK control lever in
If check valve in four valve bank
POSSIBLE PROBLEMS
DOWN position?
center manifold is faulty, pump
compensator will not receive
Four valve bank faulty.
load sense pressure from four
Solenoid valve assembly.
valve bank circuit and will
receive load sense pressure
from outrigger circuit.
Repair solenoid valve
assembly
NO
(Para 16-34). Verify
repair, go to Step 4 of
this Fault.
YES
Repair four valve
bank (Para 16-26).
Verify repair, go to
Step 4 of this Fault.
2-478
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