Procedure for Steering Cylinder Internal Leakage
Test:
1
1.
Make sure hydraulic oil is at normal operating tem-
perature.
2.
decks lowered and PTO switch off. Make sure engine is
off. Apply the parking brake.
Park machine on a level surface with the cutting
3.
Read Precautions For Hydraulic Testing.
2
CAUTION
Figure 62
Before opening hydraulic system, operate all hy-
draulic controls to relieve system pressure and
avoid injury from pressurized hydraulic oil. See
Relieving Hydraulic System Pressure in the Gen-
eral Information section of this chapter.
1.
Steering cylinder
2.
Rod end fitting
4.
the steering cylinder rod is fully extended.
Turnthesteering wheel forarightturn(clockwise) so
5.
at the rod end of the steering cylinder (Fig. 62).
Thoroughlycleantheareaaroundthehydraulichose
6.
movehydraulichosefromthefittingontherodendofthe
steering cylinder. Cap the end of the hose.
Place a drain pan under the steering cylinder. Re-
7.
that empty drain pan remains under the open fitting of
the steering cylinder.
Remove all hydraulic oil from drain pan. Make sure
8.
With the engine off, continue turning the steering
wheel for a right turn (clockwise) with the steering cylin-
derfullyextended.Observe theopenfittingonthesteer-
ing cylinder as the wheel is turned. If oil comes out ofthe
fitting while turning the steering wheel to the right, the
steering cylinder has internal leakage and should be in-
spected and repaired (see Steering Cylinder and Steer-
ing Cylinder Service in the Service and Repairs section
of this chapter). Check drain pan for any evidence of oil
that would indicate internal cylinder leakage.
9.
Removeplugfromthehydraulic hose.Connecthose
to the steering cylinder fitting.
10.If
a steering problem exists and the steering cylinder
tested acceptably, the steering control valve requires
service (see Steering Control Valve and Steering Con-
trol Valve Service in the Service and Repairs section of
this chapter).
11.
Check oil level in hydraulic reservoir and adjust if
needed.
Groundsmaster 4300--D
Page 4 -- 59
Hydraulic System
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