TM 10-5410-228-24
2.14.5 Hydraulic Manifold Valve Replacement Continued.
b. Installation (Refer to Figure 2-60)
(1) Screw valve LS3 into hydraulic manifold (1). Ensure that O-rings are seated properly and not
pinched. Tighten valve LS3 finger tight. Torque valve to 20 ft. lbs.
(2) Install valve FP6 in hydraulic manifold (1). Ensure that O-rings are seated properly and not
pinched. Tighten nut (4) finger tight. Torque nut (4) to 30 to 35 ft. lbs.
(3) Install valves FP1, FP2, and FP5 in hydraulic manifold (1). Ensure that O-rings are seated
properly and not pinched. Tighten nut (3) finger tight. Torque each nut (3) to 45 to 50 ft. lbs.
(4) Screw valve FP3 into hydraulic manifold (1). Ensure that O-rings are seated properly and not
pinched. Tighten valve FP3 finger tight. Torque valve to 15 to 20 ft. lbs.
(5) Install valves RD1 and RD2 in hydraulic manifold (1). Ensure that O-rings are seated properly
and not pinched. Tighten nut (2) finger tight. Torque each nut (2) to 20 to 25 ft. lbs.
(6) Screw valve PD1 into hydraulic manifold (1). Ensure that O-rings are seated properly and not
pinched. Torque valve to 30 to 35 ft. lbs.
(7) Screw valve SL1 into hydraulic manifold (1). Ensure that O-rings are seated properly and not
pinched. Torque valve to 20 to 25 ft. lbs.
(8) Screw valves CV1 through CV3 into hydraulic manifold (1). Ensure that O-rings are seated
properly and not pinched. Torque each valve to 20 to 25 ft. lbs.
c. Primary Hydraulic Pump Output Pressure and Relief Valve Adjustment (Refer to Figure 2-60)
NOTE
Steps 1 through 19 are for adjusting the primary hydraulic pump output pressure and relief
valve.
(1) Set POWER MODE selector switch to INT. On rear control panel, set MISSION PROFILE
switch to STATIC. Set ESS MODE selector switch to OFF.
(2) Disconnect hydraulic coupling (5) from large diameter hydraulic pump pressure hose (6), located
on the driver side of ECV, below the window frame. Install test pressure gage in hydraulic pump
pressure hose (6).
(3) Remove gage from test pressure gage. Connect flexible drain hose to gage port on tee. Position
container at end of hose to catch hydraulic fluid.
(4) Disconnect fuel solenoid from ECV engine per TM 9-2320-387-24-1.
(5) Crank ECV engine to force air out of primary hydraulic pump and lines.
(6) Reconnect fuel solenoid to ECV engine per TM 9-2320-387-24-1.
(7) Remove flexible drain hose from gage port on tee. Reconnect gage to test pressure gage.
NOTE
Alternate method: Connect hose to tee and install gage on other end of hose. This will allow
the maintainer to view the gage while adjusting pressure.
(8) Start ECV engine.
NOTE
When loosening nut, ensure sealing washer is not lost.
(9)
Check gage indication on test pressure gage. Indication should be 300 to 350 psi. If indication is
not correct, remove the outermost acorn nut and seal ring (7) from hydraulic pump control
valve. Loosen nut and rotate screw clockwise to increase pressure and counterclockwise to
decrease pressure. After pressure is correctly adjusted, tighten locknut and install acorn nut.
(10) Shut off ECV.
2-298
Change 1
