Adjustments 4 - Toro Reelmaster 7000 Service Manual

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) Pressure Test
1. Make sure hydraulic oil is at normal operating tem-
perature by operating the machine for approximately ten
(10) minutes. Make sure the hydraulic tank is full.
2. Park machine on a level surface with the cutting units
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 (port G) on rear side of 4WD/2WD control manifold
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. With seat occupied, apply brakes fully and slowly de-
press the traction pedal in the reverse direction. While
pushing traction pedal, carefully monitor the pressure
gauge. Pressure should increase until the pressure re-
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/2WD control manifold (Fig. 33) (see Adjust Control
Manifold Relief Valves in the Adjustments section of this
chapter for valve adjustment procedure). 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.
Reelmaster 7000
RIGHT
FRONT
1. 4WD/2WD manifold
1. 4WD/2WD manifold
1
1. 4WD/2WD manifold
Page 4 - - 43
Rev. A
2
1
Figure 31
2. Reducing valve (PR)
1
2
Figure 32
2. Test fitting (port G)
FRONT
2
Figure 33
2. Reducing valve (PR)
Hydraulic System