Lift Cylinder Internal Leakage Test - Toro Reelmaster 5010- H Service Manual

Lift Cylinder Internal Leakage Test

TO STEERING CONTROL VALVE AND CHARGE CIRCUIT
P1
PISTON
PUMP (P3)
INTERNAL
CASE
DRAIN
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 cutting units
disengaged and in the turn- around position. Turn the
engine off and apply the parking brake.
Hydraulic System
P2
100 MESH
SUCTION
STRAINER
CHECK FOR
CYLINDER
EXTENDING
G4
SV1
SV2
P4
T
R7
SV3
LIFT
CONTROL C2/3 L
MANIFOLD
LEFT
FRONT
(PARTIALLY
RAISED)
PLUG CAP
LEFT
REAR
Figure 43
2. Read Precautions For Hydraulic Testing in this sec-
tion.
3. 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.
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C4 L
CV4
C4
C1 L
C1
CV1
CV5
C5
C5 L
CV23
C2/3
RIGHT
FRONT
FRONT
CENTER
RIGHT
REAR
Reelmaster 5010- H