Wheel Motor Efficiency Test (Using Tester With Flow Meter and Pressure Gauge)
LIFT
CYLINDER
ORF1
CYL
SVR
R2
SVL
R1
G1
SVQ
PV
CONTROL
MANIFOLD
P
CHG
G2
T
TEST CONNECTION FOR
REAR WHEEL MOTOR SHOWN
FRONT
WHEEL
’B’ PORT
(BOTTOM)
FORWARD
M1
’P’ PORT
CAP
’P’ PORT
’P’ PORT
P2 P1
M2
M3
CAP
TESTER
’A’ PORT
(TOP)
Working Pressure
Low Pressure (Charge)
Return or Suction
Flow Direction
Figure 24
NOTE: Over a period of time, a wheel motor can wear
internally. A worn motor will be less efficient and eventu-
ally, will allow the wheel motor to stall under heavy load
conditions. Continued operation with a worn, inefficient
motor can generate excessive heat, cause damage to
sealsandothercomponentsinthehydraulicsystemand
affect overall machine performance.
Hydraulic System
Page 4 -- 28 Rev. C
ProCore 648
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