Traction System Problems
Problem
Possible Cause
Corrective Action
The hydraulic fluid is very cold.
Allow the hydraulic fluid to warm by
safely operating the machine at rest.
The hydraulic fluid level in the hydraulic
tank is low.
Adjust the hydraulic fluid level.
The traction pump bypass valve(s) is
open or damaged.
Close or replace the traction pump
bypass valve(s).
Engine speed is low.
Increase the engine speed.
A piston pump control solenoid is
damaged.
Replace the appropriate piston pump
control solenoid valve. 2 solenoid
valves are used to control reverse
operation (one for each pump/drive
axle motor), and 2 solenoid valves are
used to control forward operation (one
for each pump/drive axle motor).
One or more orifice or screen in the
piston (traction) pump control assembly
is partially obstructed or damaged.
Clean or repair piston (traction) pump
passages.
The traction pump relief valves are
leaking or damaged.
Clean or repair the piston (traction)
pump relief valves.
The charge pressure is low (steering
and lift circuit performance is also
affected).
Verify charge pressure; refer to the
InfoCenter SERVICE–INPUT/OUTPUT
–TRACTION–TRACTION INPUTS
FRONT TRACTION and REAR
TRACTION readings while the machine
is stationary.
Note:
If a traction circuit component
has internal wear or damage, it
is possible that the other traction
components are also damaged.
The traction pump is worn or damaged.
Verify traction pump operation; refer to
Traction Pump (P1 and P2) Tests in
the Hydraulic System chapter of this
manual.
The traction response is sluggish.
The drive axle motor is worn or
damaged.
Repair or replace the drive axle motor.
Traction pedal assembly movement is
restricted or traction pedal assembly is
damaged.
Test and replace traction pedal
assembly if necessary.
The machine travels too far before
stopping when the traction pedal is
released.
A piston pump control solenoid is
damaged.
Test and replace the control solenoid if
necessary
The traction pump bypass valve(s) is
open or damaged.
Close or replace the traction pump
bypass valve(s).
An electrical problem exists with the
control solenoid(s).
Test and replace the control solenoid if
necessary.
Test the machine wire harness pump
control solenoid circuit(s).
One or more orifice or screen in piston
(traction) pump control assembly is
partially obstructed or damaged.
Clean or repair piston (traction) pump
passages.
The Front or rear axle operates in one
direction only (forward or reverse).
The traction pump relief valves are
leaking or damaged.
Clean or repair the piston (traction)
pump relief valves.
Outcross 9060
Page 3–27
Troubleshooting: Traction System Problems
18234SL Rev B
Содержание 07511AA
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