Procedure for Steering Cylinder Internal Leakage
Test
6. Remove all hydraulic oil from drain pan. Make sure
that empty drain pan remains under the open fitting of
the steering cylinder.
NOTE: Steering circuit operation will be affected by
rear tire pressure, binding of steering cylinder, extra
weightonthevehicleand/orbindingofrearaxlesteering
components. Make sure that these items are checked
before proceeding with steering cylinder internal leak-
age test.
7. With the engine off, turn the steering wheel for a right
turn. Observe the open fitting on the extended steering
cylinder as the steering wheel is turned. If oil comes out
of the fitting while turning the steering wheel, the steer-
ing cylinder has internal leakage and must be repaired
(see Steering Cylinder and Steering Cylinder Service in
the Service and Repairs section of this chapter). Check
drain pan for any evidence of oil that would indicate cyl-
inder leakage.
1.
Make sure hydraulic oil is at normal operating tem-
perature by operating the machine under load for
approximately ten (10) minutes. Make sure the hydrau-
lic tank is full.
8.
draulic hose. Connect hose to the steering cylinder fit-
ting.
After testing is completed, remove plug from the hy-
2.
lowered and off. Make sure engine is off and the parking
brake is applied.
Parkmachineonalevelsurfacewiththecuttingdeck
9.
tested acceptably, consider the following:
If a steering problem exists and the steering cylinder
CAUTION
A. Steering and lift/lower gear pump section is worn
or damaged (see Steering and Lift/Lower Gear
Pump Flow Test in this section).
Prevent personal injury and/or damage to equip-
ment. Read all WARNINGS, CAUTIONS and Pre-
cautions for Hydraulic Testing at the beginning
of this section.
NOTE: If steering and lift/lower gear pump section
is worn or damaged, charge, steering and lift circuits
will all be affected.
3.
steering cylinder rod is fully extended.
Turn the steering wheel for a right turn so that the
B. Theflowdividerinthefandrivecontrolmanifoldis
faulty (see Fan Drive Manifold Service in the Service
and Repairs section of this chapter).
4.
Thoroughlycleantheareaaroundthehydraulichose
at the rod end of the steering cylinder.
C. The steering control valve requires service (see
Steering Control Valve and Steering Control Valve
Service in the Service and Repairs section of this
chapter).
5.
Place a drain pan under the steering cylinder. Re-
movehydraulichosefromthefittingontherodendofthe
steering cylinder. Install a steel plug in the disconnected
hose.
10.Check
needed.
oil level in hydraulic reservoir and adjust if
Groundsmaster 4100--D/4110--D
Page 4 -- 61
Hydraulic System
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