Groundsmaster 4300--D Hydraulic SystemPage 4 -- 59
Procedure for Steering Cylinder Internal Leakage
Test:
1. Make sure hydraulic oil is at normal operating tem-
perature.
2. Park machine on a level surface with the cutting
decks lowered and PTO switch off. Make sure engine is
off. Apply the parking brake.
3. Read Precautions For Hydraulic Testing.
CAUTION
Before opening hydraulic system, operateall 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.
4. Turn the steering wheelfor a rightturn (clockwise)so
the steering cylinder rod is fully extended.
5. Thoroughlyclean the areaaroundthehydraulic hose
at the rod end of the steering cylinder (Fig. 62).
6. Place a drain pan under the steering cylinder. Re-
move hydraulic hose from the fitting on the rod end ofthe
steering cylinder. C ap the end of the hose.
7. Remove all hydraulic oil from drain pan. Make sure
that empty drain pan remains under the open fitting of
the steering cylinder.
8. With the engine off, continue turning the steering
wheel for a right turn (clockwise) with the steering cylin-
der fully extended.Observe theopen fittingon the steer-
ing cylinder as the wheel is turned. If oil comes out of the
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. Removeplug from the hydraulic 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.
1. Steering cylinder 2. Rod end fitting
Figure 62
1
2
Hydraulic
System
