TM-5-2350-262-20-3

ARMORED COMBAT EARTHMOVER (ACE), M9

TECHNICAL MANUAL; UNIT MAINTENANCE MANUAL; VOLUME 3 OF 3; HYDRAULIC TROUBLESHOOTING TEST PROCEDURES

TM-5-2350-262-20-3 - Page 212 of 319

TM 5-2350-262-20-3

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NO. 3 LEFT ACTUATOR INTERNAL LEAKAGE TEST

NOTE

Have suitable container ready to catch oil.

•

Disconnect CORNER SPNSN UNIT-2 hose (1) from elbow (2) at port 2 on NO. 4 left

actuator (3).

Cap elbow (2).

•

Remove drain hose from REAR SPNSN UNIT-9 hose (4) and connect tee (5) and

pressure measuring device (6) between REAR SPNSN UNIT-9 hose (4) and CORNER

SPNSN UNIT-2 hose (1).

•

Start engine and observe that hydraulic pressure is greater than 2,500 psi (17,238 kPa).

Less than 2,500 psi (17,238 kPa) indicates leakage from No. 3 left actuator.

Stop engine;

relieve hydraulic pressure.

Remove all test equipment and connect hoses.

NO. 3 LEFT ACTUATOR BINDING CHECK

NOTE

Have suitable container ready to catch oil.

•

Disconnect INTMD SPNSN UNIT-2 hose (1) from adapter (2) at port 2, and disconnect LH

3 SPNSN UNIT-7 TEE tube (3) and NO 3 SPNSN UNIT-7 TEE hose (4) from elbow (5)

and tee (6) at port 7 on No. 3 left actuator (7).

Plug all lines.

•

Check for binding in No. 3 left actuator (7) by using a prybar to determine if No. 3 lift road-

wheel arm can be moved up or down.

Reconnect lines.

Notify Direct Support maintenance.