BOOM EXTEND CYLINDER SLOW OR DOES NOT EXTEND OR RETRACT

TM 10-3930-673-20-1

6. BOOM EXTEND CYLINDER SLOW OR DOES NOT EXTEND OR RETRACT.

INITIAL SETUP

Personnel Required

Tools and Special Tools

Two

Tool Kit, General Mechanics: Automotive

References

STE/ICE-R (Item 17, Appendix F)

TM 10-3930-673-10

Equipment Condition

TM 9-4910-571-12&P

Engine running (TM 10-3930-673-10)

Parking brake on (TM 10-3930-673-10)

Wheels chocked (TM 10-3930-673-10)

START

WARNING

KNOWN INFO

TEST OPTIONS

Read WARNING on

None.

Visual inspection.

following page.

STE/ICE-R #51.

POSSIBLE PROBLEMS

REASON FOR QUESTION

Is hydraulic oil tank filled to

Low hydraulic oil level.

Extend cylinder hydraulic hoses

This question eliminates possible

proper level?

faulty.

problems and determines where

Extend cylinder hose connections

troubleshooting continues.

faulty.

Tandem gear pump faulty.

Main control valve faulty.

Hydraulic joystick control valve

faulty.

Extend cylinder faulty.

Fill hydraulic oil

tank to proper level

(Para 18-2).

YES

2-814