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 414 of 790

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

0018 00--1

REAR OF VEHICLE RAISES IN SPRUNG, BUT NOT UNSPRUNG MODE

0018 00

INITIAL SETUP:

Tools and Special Tools

General Mechanic’s Tool Kit (WP 0071 00, item 7)

Personnel Required

Two 62B10

References

TM 5--2350--262--20--2

WP 0033 00

Equipment Conditions

Vehicle MASTER power OFF (TM 5--2350--262--10)

Vehicle on jack stands (TM 5--2350--262--20--1)

The rear of the vehicle is raised by left and right actuators, interconnected by hydraulic circuit 8. The SPRUNG

and UNSPRUNG circuits operate left and right rear actuators through valves and mechanical controls. Circuit 9

operates SPRUNG mode; circuit 11 operates UNSPRUNG mode.

WARNING

S

High oil pressure is present in the M9 hydraulic system. Do not disconnect any

hydraulic system component unless hydraulic system pressure has been relieved.

After hydraulic system pressure has been relieved, wait at least 4 minutes before

disconnecting any hose or fitting. Ensure each of the hydraulic control levers is

moved several times through all positions and the hydraulic tank dipstick is slowly

loosened to relieve pressure. Failure to comply may result in severe injury or

death to personnel.

S

Transmission shifting lines are pressurized. Do not disconnect lines, fittings, or

accumulator unless transmission shift control valve pressure has been relieved.

Discharge transmission shift accumulator by moving shift control lever through all

forward and reverse ranges several times with engine off. Failure to comply may

result in severe injury to personnel.