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Groundsmaster 5900/5910 Hydraulic SystemPage 4 -- 47
Procedure for Traction Circuit Reducing Valve (PR)
Pressure 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 1000 PSI (70 Bar) pressure gauge to test
port G2 on 4WD control manifold on right side of ma-
chine (Fig. 29).
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. Sit on seat and release parking brake. Apply service
brakes fully and slowly depress the traction pedal in the
reverse direction. While pushing traction pedal, look at
pressure reading on gauge:
GAUGE READING TO BE:
650 PSI (45 bar) (approximate).
7. Stop engine and record test results.
8. Ifnecessary,adjustthepressurereducingvalve(PR)
so that pressure is correct (see Adjustable Pressure
Valve in the Adjustments section of this chapter). The
pressure reducing valve (PR) is located on the lower,
rear side of the 4WD control manifold (Fig. 29).
NOTE: Do not remove the reducing valve from the hy-
draulic manifold for adjustment.
9. Disconnect pressure gauge from test port.
1. 4WD manifold 2. Test port G2
Figure 29
1
2
Hydraulic
System