Procedure for Traction Circuit Reducing Valve (PR)
Pressure Test
1.
perature by operating the machine for approximately 10
minutes. Make sure the hydraulic tank is full.
Make sure hydraulic oil is at normal operating tem-
2.
decks lowered and off. Make sure engine is off and the
parking brake is applied.
Park machine on a level surface with the cutting
2
1
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.
Figure 29
2.
1.
4WD manifold
Test port G2
3.
port G2 on 4WD control manifold on right side of ma-
chine (Fig. 29).
Connect a 1000 PSI (70 Bar) pressure gauge to test
4.
at idle speed. Check for hydraulic leakage and correct
before proceeding with test.
After installing pressure gauge, start engine and run
5.
6.
brakes fully and slowly depress the traction pedal in the
reverse direction. While pushing traction pedal, look at
pressure reading on gauge:
Operatetheengineatfullenginespeed (2750RPM).
Sit on seat and release parking brake. Apply service
GAUGE READING TO BE:
650
PSI (45 bar) (approximate).
7.
8.
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).
Stop engine and record test results.
Ifnecessary,adjustthepressurereducingvalve(PR)
NOTE: Do not remove the reducing valve from the hy-
draulic manifold for adjustment.
9.
Disconnect pressure gauge from test port.
Groundsmaster 5900/5910
Page 4 -- 47
Hydraulic System
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