TM-5-2350-378-24-P

HYDRAULIC DIAGNOSTIC CENTER (HDC) SUPPORTING ARMORED COMBAT EARTHMOVER (ACE), M9

TECHNICAL MANUAL; UNIT, DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE MANUAL INCLUDING REPAIR PARTS AND SPECIAL TOOLS LIST

TM-5-2350-378-24-P - Page 152 of 790

TM 5--2350--378--24&P

APRON WILL NOT RAISE -- Continued

0009 00

Figure 14. Apron Cylinders Leakage Test

APRON CYLINDER LEAKAGE TEST

NOTE

Have suitable container ready to catch oil.

Have assistant start engine, and retract cylinders (Figure 14, item 4) approximately half-

way. Stop engine; relieve hydraulic pressure.

Disconnect CKT--20 (REAR) TEE hose (Figure 14, item 2) and CKT--20 (REAR) TEE

tube (Figure 14, item 1) from tee (Figure 14, item 3) on hull floor. Plug hose (Figure 14,

item 2) and tube (Figure 14, item 1), and cap tee (Figure 14, item 3).

Start engine and have assistant hold APRON CONTROL lever in UP position. Measure

cylinder rod extension of both apron cylinders (Figure 14, item 4). Continue to hold

APRON CONTROL lever UP for one minute. Have assistant return APRON CONTROL

lever to NEUTRAL position. Measure the cylinder rod extension of both apron cylinders

(Figure 14, item 4) again. If extension rate is greater than 0.5 in. (13 mm) per minute,

cylinder is leaking excessively.

Stop engine; relieve hydraulic pressure.

END OF WORK PACKAGE

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