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 150 of 790

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

0009 00--17

APRON WILL NOT RAISE -- Continued

0009 00

Figure 13. Apron Cylinders Oil Flow Test

APRON CYLINDERS OIL FLOW TEST

NOTE

Have suitable container ready to catch oil.

Extend apron cylinders (Figure 13, item 1) fully. Stop engine. Relieve hydraulic

pressure by moving APRON CONTROL lever UP and DOWN several times, and

disconnect left and right APRON CYL--#19 hoses (Figure 13, item 2) from apron

cylinders (Figure 13, item 1). Hold open end of each hose (Figure 13, item 2) in a

bucket.

NOTE

If there is no flow from one of the APRON CYL--#19 hoses, the blockage is

between the cylinder end of that hose and circuit 19 tee on the hull floor.

If no flow from either hose is observed, the blockage is in CONT VLV--#19

hose between circuit 19 control valve and tee on hull floor.

Have assistant start engine and slowly move APRON CONTROL lever to UP position.

Observe oil flow from both APRON CYL--#19 hoses. Stop engine; relieve hydraulic

pressure. Reconnect left and right APRON CYL--#19 hoses (Figure 13, item 2) to

cylinders (Figure 13, item 1).