TM 5-3805-280-24-1
Operational Checkout Procedure
Engine at fast idle.
YES: Go to next check.
BOOM UP, ARM IN, AND
BUCKET COMBINED
OPERATION CHECK
Work mode selector in dig mode.
NO: Inspect bucket flow
control valve in control
valve if boom speed
Actuate the boom up function, arm in function and then the bucket function.
slows excessively. Go to
9005
Group 3360.
Does boom continue to move at approximately the same speed after bucket function is
10
actuated?
15
1/1
Engine at fast idle
ARM REGENERATIVE
YES: Go to next check.
VALVE OPERATION
CHECK
Work mode selector in dig mode.
NO: Check the rear pump
pressure sensor, arm in
Extend the arm to full extension and then lower boom so bucket is on the ground.
pressure sensor, boom
up pressure switch, and
arm regenerative solenoid
Actuate the boom up and arm in functions in combined operation.
valve. Go to Group
9015-15.
Does the arm move smoothly through the complete cycle and not hesitate when it
goes through the vertical position?
IF OK: Check the arm
regenerative valve in the
control valve. Go to
Group 3360.
1/1
Engine at fast idle.
PROPEL SYSTEM
YES: Go to next check.
TRACKING CHECKS
WHILE PROPELLING
Propel speed switch in fast speed (rabbit).
NO: Note which track
does not move or if
Propel machine at full speed forward on a flat and level area.
machine mistracks and
the mistrack pattern. Go
to Propel System
Repeat procedure in reverse.
Tracking Test in Group
9025-25.
Do both tracks move and machine does not mistrack excessively in forward or
reverse?
1/1
2-15
