SPOOL AND POPPET VALVE CHECKS
To test spool valve, extend and retract track adjuster cylinders. To
retract track adjuster cylinders, the poppet valves must be
overridden. To override the poppet valves (X1 or X2), depress
manual override, rotate 180o counter clockwise and release (it will
Have assistant start engine
To extend left cylinder, depress manual override spool valve Z3 (1).
To extend right cylinder, depress manual override spool valve Z2 (2).
To retract left cylinder, override poppet valve X2 (3) and lift manual override spool valve Z3
To retract right cylinder, override poppet valve X1 (4) and lift manual override spool valve Z2
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 suitable 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.