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 517 of 790

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

APPARENT HDC SYSTEM PROBLEM -- Continued

0022 00

YES

YES

from block 61 or

block 58

NO

NO

63

If here, “CIRCUIT FAULT” message is associated

with a solenoid valve (lower LCD screen display).

Power off HDC system.

Tag the W2 or W3 cable assembly electrical lead to

the HDC system solenoid valve (on the HDC

system primary manifold, right forward manifold,

left forward manifold, or aft manifold, as applicable)

identified in the “CIRCUIT FAULT” message and

switch electrical leads with another (identical type)

solenoid valve on the same manifold assembly.

Power up HDC system again.

Does lower LCD screen display the same

“CIRCUIT FAULT” message (identifying the same

solenoid valve as the previous “CIRCUIT FAULT”

message)?

65

Power off HDC system.

Replace the applicable HDC system solenoid

valve identified in the first “CIRCUIT FAULT”

message (WP 0031 00, WP 0032 00,

WP 0033 00, WP 0035 00).

If a “good” solenoid valve was switched with

another valve to check out the first valve, make

sure the good valve is returned to its original

location.

Reconnect proper electrical leads and ensure all

W2 or W3 electrical leads are mated with the

proper solenoid valves.

Continue performing HDC system functional

check--out.

64

Power off HDC system.

If a “good” solenoid valve was switched with

another valve to check out the first valve, make

sure the good valve is returned to the original

location.

Reconnect proper electrical leads and ensure all

W2 or W3 electrical leads are mated with the

proper solenoid valves.

YES

To block 66

0022 00--34/35 blank