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 117 of 790

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

ALL HYDRAULIC FUNCTIONS INOPERATIVE -- Continued

0007 00

17

Check operation of vehicle engine.

Does engine appear to be operating normally?

NO

from block 1

16

Does vehicle “rise” (within two minutes) when engine

is started with sprung/unsprung lever in sprung?

20

Charge main accumulator

(TM 5--2350--262--20--2).

22

Charge main accumulator. If charge can

not be maintained, repair or replace main

accumulator (TM 5--2350--262--20--2).

18

Check main accumulator charge with engine off.

Does hydraulic pressure gauge indicate a pressure

between 1,500--2,000 psi (10,343--13,790 kPa)?

YES

to block 23

NO

to block 24

NO

YES

NO

YES

19

Start engine and check main accumulator charge

with engine speed at 1,500 rpm.

Is hydraulic pressure at least 2,800 psi (19,306 kPa)

with engine speed at 1,500 rpm?

YES

21

Repair/replace compensating pump.

Are hydraulic oil levels at proper fill levels?

Add hydraulic oil, but do not overfill.

NO

NO

YES

YES

0007 00--24/25 blank