Reelmaster 5010 Series Hydraulic System (Rev. C)Page 4 -- 55
Procedure for Steering Relief Valve Pressure
Test:
1. Make sure hydraulic oil is at normal operating tem-
perature by operating the machine under load for
approximately ten (10) minutes.
2. Parkmachineonalevelsurfacewiththecuttingunits
loweredandPTOswitchoff.Makesureengineisoff.Ap-
ply the parking brake.
3. Read Precautions For Hydraulic Testing in this sec-
tion.
CAUTION
Beforeopening hydraulicsystem,operate allhy-
draulic controls to relieve system pressure and
avoid injury from pressurized hydraulic oil. See
RelievingHydraulicSystemPressureintheGen-
eral Information section of this chapter.
4. Thoroughlycleantheareaaroundthehydraulichose
at the rod end of the steering cylinder (Fig. 53).
5. Remove hydraulic hose from the fitting on the rod
end of the steering cylinder.
6. Installateefittingbetweenthedisconnectedhydrau-
lic hose and the steering cylinder fitting. Install a 5000
PSI (350 bar) pressure gauge to the tee fitting.
7. After installing pressure gauge, start engine and run
atidle speed.Checkforany hydraulic leakage fromtest
connections and correct before proceeding with test.
8. Move throttle to full speed (3200 RPM).
IMPORTANT: Hold steering wheel at full lock only
long enough to get a system pressure reading.
Holding the steering wheel against the stop for an
extended period may damage the steering control
valve.
9. Watch pressure gauge carefully while turning the
steering wheel for a left hand turn (counter--clockwise)
and holding.
10.Systempressureshouldbeapproximately1000PSI
(69bar) asthereliefvalvelifts.Returnsteeringwheelto
the neutral position.
11.Shut off engine. Record test results.
12.If specification is not met, repair or replace steering
control valve (relief v alve in steering control valve is not
replaceable).
13.After testing is completed, make sure that engine is
stopped, then relieve hydraulic system pressure (See
RelievingHydraulicSystemPressure in the GeneralIn-
formation section of this chapter). Remove tee fitting
and pressure gauge from hydraulic hose and steering
cylinder.Connecthydraulichose tosteeringcylinderfit-
ting.
1. Steering cylinder 2. Rod end fitting
Figure 53
1
2
Hydraulic
System
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