SPOOL AND POPPET VALVE CHECKS
The track adjuster cylinders must be retracted to raise or lower
front corner(s). To test spool valve, extend and retract track
adjuster cylinders. To retract track adjuster cylinders, the poppet
valves must be overriden. To override poppet valves (X1 or X2),
depress manual override, rotate 180o counter clockwise and
release (it will be up).
Have assistant start engine.
To extend left cylinder, depress manual override spool valve Z4 (1).
To extend right cylinder, depress manual override spool valve Z1 (2).
To retract left cylinder, override poppet valve X2 (3) and lift manual override spool valve
To retract right cylinder, override popet valve X1 (4) and lift manual override spool valve
Stop engine; relieve hydraulic pressure.
OIL FLOW TEST
Have suitable container ready to catch oil.
Disconnect HYDR-MAN-IN-9 hose (5) from elbow (6) at port P on track adjuster manifold
(7). Cap elbow (6).
While holding open end of hose (5) in container, have assistant start engine. Check for
free flow of hydraulic oil from hose (5).
Stop engine; relieve hydraulic pressure. Connect hose (5) to elbow (6).
Refer to TM 5-2350-262-20-2.
Perform Semi-automatic track adjuster electrical troubleshooting, refer to TM 5-2350-262-20-1.