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 314 of 644

APPARENT HYDRAULIC DIAGNOSTIC CENTER (HDC) SYSTEM PROBLEM - Continued

STEP

1.

Perform HDC system functional check-out (WP

0025).

CONDITION/INDICATION

Can HDC system functional check-out be performed successfully?

DECISION

YES - HDC system appears to be functioning properly and ready to aid in troubleshooting the M9 ACE hydraulic

system. If this functional checkout was performed as part of weekly HDC system PMCS (WP

0023), power off

HDC system, disconnect it from vehicle, and stow HDC control box and umbilical cable W4. If this functional

checkout was performed prior to troubleshooting a problem in vehicle hydraulic system using HDC system, refer

to applicable problem symptom work package as applicable and proceed as indicated (WP

0005).

NO - Go to Step (2).

STEP

2.

Check installation of HDC control box and umbilical cable W4. Check for clean and secure HDC system ground

connection in vehicle (Figures 1, 2, and 3).

W2J1

UMBILICAL CABLE

ASSEMBLY W4

W4P6

W3J1

T01901HDC

W1J1

UMBILICAL CABLE

DISCONNECT

PANEL

W4P4

W4P5

Figure 1.

Umbilical Cable Assembly W4 Connection to Umbilical Cable Disconnect Bracket.

TM 5-2350-378-23&P

0021

0021-2