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Groundsmaster 5900/5910 Hydraulic SystemPage 4 -- 45
Procedure for Rear Traction Circuit(RV) Relief Pres-
sure Test
1. Make sure hydraulic oil is at normal operating tem-
perature by operating the machine for approximately 10
minutes. Make sure the hydraulic tank is full.
2. Park machine on a level surface with the cutting
decks lowered and off. Make sure engine is off and the
parking brake is applied.
CAUTION
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.
3. Connect a 5000 PSI (350 Bar) gauge to test port G2
on 4WD control manifold on right side of machine (Fig.
27).
4. After installing pressure gauge, start engine and run
at idle speed. Check for hydraulic leakage and correct
before proceeding with test.
5. Operatetheengine at full engine speed (2750 RPM).
6. Operate the machine in 4WD with the cutting decks
lowered. Drive down a slope in a forward direction, de-
crease pressure on the traction pedal and monitor the
pressure gauge. Pressure should increase until the re-
lief valve (RV) lifts. Record test results.
GAUGE READING TO BE:
1200 PSI (83 bar) (approximate).
7. If necessary,adjust the relief valve (RV) so that pres-
sure is correct (see Adjustable Pressure Valve in the Ad-
justments section of this chapter). Relief valve (RV) is
located on the rear side of the 4WD control manifold
(Fig. 27).
8. Disconnect pressure gauge from manifold test port.
1. 4WD control manifold
2. Test port G2
3. Relief valve RV
Figure 27
1
2
3
Hydraulic
System