Lift Cylinder Internal Leakage Test - Toro Reelmaster 5210 Service Manual

Lift Cylinder Internal Leakage Test

TO MOW CONTROL
(FRONT CUTTING UNITS)
TO MOW CONTROL
(REAR CUTTING UNITS)
PUMP (P5)
INTERNAL
CASE
DRAIN
FROM MOW CONTROL
MANIFOLD
R8
LEFT FRONT (#5) LIFT CYLINDER TEST SHOWN
The lift cylinder internal leakage test should be per-
formed if a cutting unit raise and lower problem is identi-
fied. This test will determine if a lift cylinder is faulty.
NOTE: Cutting unit raise/lower circuit operation will be
affected by lift cylinder binding, extra weight on the cut-
ting units and/or binding of lift components. Make sure
that these items are checked before proceeding with lift
cylinder internal leakage test.
Procedure for Lift Cylinder Internal Leakage Test:
1. Park machine on a level surface with the PTO switch
OFF. Position the cutting units in the turn--around posi-
tion and turn the engine off. Apply the parking brake.
Hydraulic System (Rev. C)
TO STEERING
CONTROL VALVE
P1 P2 P3 P4
100 MESH
SUCTION
STRAINER
G4
SV2
P4
T
SV3
LIFT
CONTROL C2/3 L
MANIFOLD
LEFT
FRONT
(PARTIALLY
RAISED)
PLUG CAP
CHECK FOR
CYLINDER
EXTENDING
Figure 48
2. For the lift cylinder that is to be tested, use a jack to
raise the lift arm slightly. This will remove the load from
the lift cylinder and relieve lift cylinder hydraulic pres-
sure. Leave the jack under the lift arm to support the lift
arm and to prevent the lift arm from lowering.
NOTE: If either of the rear lift cylinders is being tested,
both rear lift arms need to be supported.
3. Thoroughly clean the area around the end of the hy-
draulic hose at the rod end of the lift cylinder. Disconnect
the hydraulic hose from the lift cylinder rod end fitting
(Fig. 49).
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C4 L
SV1
CV4
C4
C1 L
C1
CV1
R7
CV5
C5
C5 L
CV23
C2/3
RIGHT
FRONT
LEFT RIGHT
REAR
REAR
Reelmaster 5010 Series
FRONT
CENTER