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Rev. A
Reelmaster 7000 Hydraulic SystemPage 4 -- 43
NOTE: When in reverse, pressure reducing valve (PR)
limits the pressure to the rear axle motor to 450 PSI (31
bar) so the rear wheels will not scuff the turf.
Procedure for Traction Circuit Pressure Reducing
Valve(PR)PressureTest
1. Make sure hydraulic oil is at normal operating tem-
peratureby operatingthemachinefor approximatelyten
(10) minut es. Make sure the hydraulic tank is full.
2. Parkmachine ona levelsurface withthe cuttingunits
lowered and off. Make sure engine is off and the parking
brake is engaged.
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
fitting(portG) onrearsideo f 4WD/2WDcontrolmanifold
under front of machine (Figs. 31 and 32).
4. After installing pressure gauge, start engine and run
at low idle speed. Check for hydraulic leakage and cor-
rect before proceeding with test.
5. Move throttle to high idle speed (2850 RPM).Make
sure that mow speed limiter is in the mow (4WD) posi-
tion. Release parking brake.
6. Withseat occupied, applybrakes fully andslowly de-
press the traction pedal in t he reverse direction. While
pushing traction pedal, carefully monitor the pressure
gauge. Pressure should increase until the pressure r e-
ducing valve opens.
GAUGE READING TO BE 420 to 470 PSI (29 to 32
bar).
7. Release traction pedal, stop engine and record test
results.
8. If specification is not met, clean or adjust pressure
reducing valve (port PR) located on the right side of the
4WD/2WDcontrolmanifold(Fig. 33)(see AdjustControl
Manifold Relief Valves in the Adjustments section of this
chapterforvalve adjustmentprocedure).Recheck redu-
cing valve pressure after adjustment.
9. When testing is completed, disconnect pressure
gauge from test port. Install dust cap to test port fitting.
1. 4WD/2WD manifold 2. Reducing valve (PR)
Figure 31
1
2
FRONT
RIGHT
1. 4WD/2WD manifold 2. Test fitting (port G)
Figure 32
1
2
1. 4WD/2WD manifold 2. Reducing valve (PR)
Figure 33
1
2
FRONT
Hydraulic
System