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 204 of 790

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

0012 00--17

EJECTOR DOES NOT EXTEND OR RETRACT -- Continued

0012 00

Figure 11. HDC Control Box

Figure 12. Main Relief Valve 13L and 13R

MAIN RELIEF VALVE ADJUSTMENT -- CONTINUED

MAIN RELIEF VALVE 13L

With the SPRUNG/UNSPRUNG lever still in SPRUNG, have assistant start engine and

move left--hand SUSPENSION CONTROL lever to RAISE, while at the same time,

holding EJECTOR CONTROL lever in BACK. Read transducer T--4 hydraullic pressure

on the HDC display (Figure 11, item 1). Adjust the main relief valve 13L by loosening

jam nut (Figure 12, item 2) and rotating adjustment screw (Figure 12, item 1) clockwise

to increase pressure; counterclockwise to decrease pressure. When hydraulic pressure

is within limits, tighten jam nut (Figure 12, item 2).

Stop engine; relieve hydraulic pressure.

MAIN RELIEF VALVE 13R

Repeat the previous steps using the right--hand SUSPENSION CONTROL lever, main

relief valve 13R, and read T--3 pressure. Adjustment for main relief valve 13R is on

underside of main relief valve 13R.

Stop engine; relieve hydraulic pressure.