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Reelmaster 5010 SeriesHydraulic System (Rev. C) Page 4 -- 52
Lift Cylinder Internal Leakage Test
Figure 48
T
C4
P4
C5
C1
C2/3C2/3L
LEFT
FRONT
RIGHT
FRONT
FRONT
CENTER
REAR
R8
C4L
C5L
C1L
REAR
LEFT
RIGHT
100MESH
SUCTION
STRAINER
INTERNAL
CASE
DRAIN
P1
P2
P3 P4
G4
SV3
SV1
SV2
R7
SVRV
CV4
CV1
CV5
CV23
PUMP(P5)
TOSTEERING
TOMOWCONTROL
(REARCUTTING UNITS)
(FRONTCUTTING UNITS)
TOMOWCONTROL
FROMMOW CONTROL
MANIFOLD
CONTROLVALVE
CHECK FOR
CYLINDER
(PARTIALLY
RAISED)
LEFT FRONT (#5) LIFT CYLINDER TEST SHOWN
PLUG
LIFT
CONTROL
MANIFOLD
CAP
EXTENDING
The lift cylinder internal leakage test should be per-
formed if acutting unit raise and lowerproblem 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 machineon a level surfacewith thePTO switch
OFF. Position the cutting units in the turn--around posi-
tion and turn the engine off. Apply the parking brake.
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-
draulichose attherodend oftheliftcylinder.Disconnect
the hydraulic hose from the lift cylinder rod end fitting
(Fig. 49).