Test No. 5: Front Mow Circuit Pressure - Toro Reelmaster 6500–D Service Manual

TEST NO. 5: Front Mow Circuit Pressure

1. Make sure hydraulic oil is at normal operating temper-
ature before doing test.
2. Lower cutting units, engage parking brake and stop
the engine. Set HOC Selector Knob, located under the
instrument panel, to position A (full speed). Make sure
Backlap switch is OFF.
3. Raise seat to get access to hydraulic test fittings. Re-
move access cover from in front of hydraulic valve block.
Install a 5000 PSI gauge with extension hose onto quick
disconnect fitting in port G1A. Put gauge and hose
through opening in front of hydraulic valve block, then
lower the seat.
4. Sit on the seat and start the engine. Move throttle to
full speed (approx. 2500 RPM for 6500–D and 2750
RPM for 6700–D).
Keep away from reels during tests to prevent
personal injury from rotating reel blades.
5. While sitting on seat, move "Enable/Disable" switch
to ENABLE. Move "Lower–Mow/Raise" lever forward to
engage cutting units, then look at the gauge.
GAUGE READING:
Approx. 1000 PSI (free running)
1500 to 1800 PSI (mowing)
6. Stop the engine. If pressure is too high, bedknife to
reel contact may be too tight and/or the cutting units are
dull. If pressure is too low, do relief pressure test.
Relief Pressure Test
7. Disconnect wire connector from solenoid S2A.
8. While sitting on seat, move "Enable/Disable" switch
to ENABLE. Move "Lower–Mow/Raise" lever forward to
engage cutting units, then look at the gauge.
GAUGE READING: 2800 – 3200 PSI
9. Stop the engine. If pressure is too low, remove cap
from relief valve R1A and adjust screw to get correct
pressure. If pressure will not increase by adjusting relief
valve, the relief valve may be stuck open. If relief valve
is operating properly, solenoid valve VS1A or S1A may
be stuck open or pump should be suspected of wear and
inefficiency.
Hydraulic System
WARNING
2
1
Page 4 – 34 Rev. B
Figure 16
(Front Valve Block)
1. Test Port G1A
2. Relief valve R1A
Reelmaster 6500–D/6700–D