BOOM EXTEND CYLINDER SLOW OR DOES NOT EXTEND OR RETRACT - continued

TM 10-3930-673-20-1

6. BOOM EXTEND CYLINDER SLOW OR DOES NOT EXTEND OR RETRACT (CONT).

KNOWN INFO

TEST OPTIONS

Hydraulic oil OK.

Pressure test.

Does hydraulic joystick

Extend cylinder hydraulic hoses

STE/ICE-R #51.

OK.

control valve operate

REASON FOR QUESTION

Extend cylinder hose connections

properly?

If hydraulic joystick control valve

OK.

does not operate properly,

Tandem gear pump OK.

control valve is faulty.

Main control valve OK.

POSSIBLE PROBLEMS

Hydraulic joystick control valve

faulty.

Extend cylinder faulty.

Replace faulty

hydraulic control

valve (Para 18-11).

YES

Notify Direct

Support about this

fault.

2-820

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