TM 5-2350-262-20-3
19
FRONT CORNER (LEFT OR RIGHT) DOES NOT RAISE OR LOWER IN UNSPRUNG
MODE, SEMI-AUTOMATIC TRACK ADJUSTER (NEW PRODUCTION)
Track adjustment is provided by hydraulic pressure from the compensating pump and controlled by
electric current tapped at the SPRUNG/UNSPRUNG pressure switch. In the UNSPRUNG mode, hydraulic
pressure is delivered to the track adjuster manifold from line nine (9) and returned through line seven (7) at the left
manifold.
WARNING
High pressure is present in the M9 hydraulic system. Do not disconnect any hydraulic
system component unless hydraulic system pressure has been relieved. Ensure each
hydraulic control lever is moved several times through all positions and hydraulic tank
dipstick is slowly loosened to relieve pressure. Failure to comply may result in severe
injury or death to personnel.
NOTE
Use these procedures to troubleshoot either left or right front corner. Front corners
will not lower if the track adjuster cylinders are not retracted. The hydraulic valves are
equipped with manual operators which can be used to check the hydraulic portion of
the system. If everything functions by the manual hydraulic operators, the problem
will be in the electric circuit (refer to TM 5-2350-262-20-1).
2
4
HIGH-PRESSURE
3
CIRCUIT
RETURN
2
SUPPLY
5
COMPONENTS:
9
1.
COMPENSATING PUMP
2.
HIGH-PRESSURE FILTER
3.
MAIN ACCUMULATOR
4.
RETURN LINE FILTER
8
9
5.
DIRECTIONAL CONTROL
VALVE BANK
6.
HYDRAULIC RESERVOIR
7.
MANIFOLD, LEFT HAND
8.
TRACK ADJUSTING MANIFOLD
ASSEMBLY
10. TRACK ADJUSTING CYLINDERS
1
6
7
Change 1
