Toro Reelmaster 5010- H - Lift Cylinder Internal Leakage Test

Reelmaster 5010- HHydraulic System Page 4 - 46
Lift Cylinder Internal Leakage Test
Figure 43
T
C4
P4
C5
C1
C2/3C2/3 L
LEFT
FRONT
RIGHT
FRONT
FRONT
CENTER
REAR
C4 L
C5 L
C1 L
REAR
LEFT
RIGHT
G4
SV3
SV1
SV2
R7
SVRV
CV4
CV1
CV5
CV23
CHECK FOR
CYLINDER
(PARTIALLY
RAISED)
LEFT FRONT (#5) LIFT CYLINDER TEST SHOWN
PLUG
LIFT
CONTROL
MANIFOLD
CAP
EXTENDING
TO ST EERING CONTROL VALVE AND CHARGE CIRCUIT
100 MESH
SUCTION
STRAINER
P1
P2
INTERNAL
CASE
DRAIN
PUMP (P3)
PISTON
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. Parkmachineonalevelsurfacewiththecuttingunits
disengaged and in the turn- around position. Turn the
engine off and apply the parking brake.
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.