BOOM DOES NOT TELESCOPE OR TELESCOPES SLOWLY. (Cont) -726250662

TM 9-2320-364-34-1

13. BOOM DOES NOT TELESCOPE OR TELESCOPES SLOWLY (CONT).

TEST OPTIONS

KNOWN INFO

Operation test.

Unit Troubleshooting

Does boom telescope when

tasks completed.

BOOM control lever is held in

REASON FOR QUESTION

Crane swings.

the UP position?

If load sense check valve in four

POSSIBLE PROBLEMS

valve bank is faulty, pump

control will not receive load

Four valve bank faulty.

sense pressure. If BOOM

Boom chain or cable faulty.

control lever is held in the UP

Telescope cylinder

position while attempting to

faulty.

telescope, pump control will

sense load sense pressure from

BOOM circuit.

Go to Step 3 of this

Fault.

YES

Repair four valve

bank (Para 16-26).

Verify repair, go to

Step 7 of this Fault.

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