TM-5-2350-378-23-P

ARMORED COMBAT EARTHMOVER (ACE), M9; HYDRAULIC DIAGNOSTIC CENTER

TECHNICAL MANUAL; FIELD MAINTENANCE MANUAL INCLUDING REPAIR PARTS AND SPECIAL TOOLS LIST

JUNE 2012

TM-5-2350-378-23-P - Page 108 of 644

APRON WILL NOT RAISE - Continued

STEP

8.

Perform apron cylinder leakage test.

NOTE

Have suitable container ready to catch oil.

a.

Have assistant start engine, and retract cylinders (Figure 10, Item 4) approximately halfway.

b.

Stop engine; relieve hydraulic pressure.

c.

Disconnect CLT-20 (REAR) TEE hose (Figure 10, Item 2) and CKT-20 (REAR) TEE tube

(Figure 10, Item 1) from tee (Figure 10, Item 3) on hull floor.

d.

Plug hose (Figure 10, Item 2) and tube (Figure 10, Item 1), and cap tee (Figure 10, Item 3).

e.

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

f.

Measure cylinder rod extension of both apron cylinders (Figure 10, Item 4).

g.

Continue to hold APRON CONTROL lever UP for one minute.

h.

Have assistant return APRON CONTROL lever to NEUTRAL position.

i.

Measure cylinder rod extension of both apron cylinders (Figure 10, Item 4) again.

T00614HDC

4

1

2

3

Figure 10.

Apron Cylinders Leakage Test.

j.

If extension rate is greater than 0.5 in. (13 mm) per minute, cylinder is leaking excessively.

TM 5-2350-378-23&P

0008

0008-12