b. Cycle the parking brake ON and OFF. If the
parking brake does not release, move the
parking brake switch back to the ON position
and go to Step 2.
2. Emergency brake release valve closed:
a. Turn the needle valve counterclockwise, and
attempt to release the parking brake. Refer to
“Machine Features, Emergency Brake Release
Valve” in this section. If the parking brake does
not release, go to Step b.
b. Refer the problem to Unit Maintenance for
repair.
Problem 15: Service Brakes Slip
Probable Cause(s):
• Drive belt loose
• Front idlers worn
1. Drive belt loose:
a. Observe the tension fail indicator. If the tension
fail indicator is illuminated, go to Step c. If the
indicator is not illuminated, go to Step b.
b. Estimate if the drive belt is sufficiently loose to
cause the brake slippage. If the drive belt is
determined as the probable cause for the brake
slippage, go to Step c. If the drive belt is
determined not to be the likely cause of the
problem, go to Step e.
c. Perform an emergency drive belt tension
procedure, and go to Step d.
d. Inform Unit Maintenance that the suspension
system must be recharged as soon as possible.
e. Refer the brake problem to Unit Maintenance for
repair.
2. Front idlers worn:
Report to Unit Maintenance that the front idlers
should be check for excessive wear.
Problem 16: Machine Drifts or Pulls to One Side
During Straight Travel
Probable Cause(s):
• Drive Belt Loose
1. Drive belt loose:
a. Observe the tension fail indicator. If the tension
fail indicator is illuminated, go to Step c. If the
indicator is not illuminated, go to Step b.
b. Visually inspect the belt tension to determine if
one drive belt is significantly more loose than the
other. If one drive belt is determined to be
significantly more loose than the other, go to
Step c. If differences between the tension of the
drive belts cannot be detected, go to Step e.
c. Perform the emergency drive belt tension
procedure, and go to Step d.
d. Inform Unit Maintenance that the suspension
system must be recharged as soon as possible.
e. Refer the problem to Unit Maintenance for
repair.
Problem 17: Machine Turns in Opposite
Direction Than Expected During REVERSE
Travel
Probable Cause(s):
• Circuit breaker tripped
1. Circuit breaker tripped:
a. Check the operation of the gauges or kneeling
switch. If the gauges and kneeling switch
function properly, go to Step c. If the gauges
and kneeling switch do not function properly, go
to Step b.
b. Reset the auxiliary circuit breaker and check the
steering operation in REVERSE. Also check the
function of the gauges and the kneeling switch.
If any of these checks show a malfunction, go to
Step c.
c. Report the steering malfunction to Unit
Maintenance for repair.
Problem 18: Machine Not Level on Level Ground
Probable Cause(s):
• One manual suspension lock valve closed
• Suspension system not charged correctly
1. One manual suspension lock valve closed:
96
Operation Section
Troubleshooting
TM5-2430-200-10
