Multi Pro 5800 Hydraulic SystemPage 5 − 33
Traction Circuit − Wheel Motor Efficiency Test
Over a period of time, a wheel motor can wear internally.
A worn motor may by−pass oil to its case drain causing
the motor to be less efficient. Eventually, enough oil loss
will cause the wheel motor to stall under heavy load con-
ditions. Continued operation with a worn, inefficient mo-
tor can generate excessive heat, cause damage to
seals and other components in the hydraulic system and
affect overall machine performance.
IMPORTANT: If component failure is suspect, see
Traction Circuit Component Failure in the General
Information section of this chapter for information
regarding the importance of removing contamina-
tion from the traction circuit before operating the
system.
1. Make sure hydraulic oil is at normal operating tem-
perature by operating the machine for approximately ten
(10) minutes. Make sure the hydraulic tank is full.
2. Park machine on a level surface, stop engine, en-
gage parking brake and remove key from the ignition
switch. After turning engine off, operate all hydraulic
controls to relieve hydraulic system pressure.
CAUTION
Prevent personal injury and/or damage to equip-
ment. Read all WARNINGS, CAUTIONS and Pre-
cautions for Hydraulic Testing at the beginning
of this section.
3. Make sure that traction pedal is adjusted to the neu-
tral position (see Adjust Traction Pedal for Neutral in this
Chapter).
4. Attach a heavy chain to the rear of the machine frame
and an immovable object to prevent the machine from
moving during testing.
5. Chock the wheels to prevent wheel rotation during
testing.
1. RH wheel motor
2. Hydraulic tube
3. Cap (2)
4. Hydraulic hose
Figure 27
FRONT
RIGHT
INSTALL
HYDRAULIC
TESTER HERE
1
2
3
4
3
FLOW
RH WHEEL MOTOR TEST
6. To test right side (RH) wheel motor efficiency, isolate
the hydraulic motors and connect a hydraulic tester as
follows (Fig. 27):
A. Thoroughly clean all fittings and hydraulic lines at
both wheel motors.
B. Disconnect both ends of the hydraulic tube
(item 2) and remove it from the machine.
C. Cap the open fittings (one at each of the wheel
motors).
D. Disconnect hydraulic hose from tee fitting at the
“A” port of the RH wheel motor.
IMPORTANT: Make sure that the oil flow indica-
tor arrow on the flow meter is showing that the oil
will flow from the pump (hydraulic hose),
through the tester and into the tee fitting in the
RH wheel motor.
E. Install 15 GPM Hydraulic Tester #TOR214678
(pressure and flow) in series between the tee fitting
and the disconnected hose. Use hydraulic hose kit
(see Special Tools in this chapter) if necessary to
connect tester to machine. Make sure that flow con-
trol valve on tester is fully open.
Hydraulic
System
To Next Page
Loading...
Need help?
General
