Test No. 3: Cutting Unit Drive Circuit Pressure - Toro Reelmaster 6500-D Service Manual

TEST NO. 3: Cutting Unit Drive Circuit Pressure

Note: The front cutting unit drive circuit is protected by
relief valve R1 and the rear circuit by relief valve R2. See
Hydraulic Flow Diagrams at the beginning of this chap-
ter.
1. Make sure hydraulic oil is at normal operating tem-
perature by operating the machine for approximately 10
minutes.
2. Make sure machine is parked on a level surface with
the cutting units lowered and off. Make sure engine is
off.
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. Raise hood to get access to hydraulic test fittings.
Install a 5000 PSI gauge with extension hose onto quick
disconnect fitting in port G1 or G2 (Fig. 15).
4. Set reel speed control FC1 or FC2 to position 5.
Make sure Mow/Backlap valve MD1 or MD2 is in the
"Mow" position.
5. Make sure cutting units are completely lowered and
engine is OFF.
To check the front circuit, insert a block of wood be-
tween cutting unit reel blades and front cross tubes of
any two-front cutting units to prevent the reels from
turning (Fig. 16). Two cutting unit reels must be
blocked to exceed the 3000 PSI front cutting unit cir-
cuit relief valve R1.
To check the rear circuit, insert a block of wood be-
tween cutting unit reel blades and front cross tubes of
any two-rear cutting units to prevent the reels from
turning (Fig. 16). Two cutting unit reels must be
blocked to exceed the rear cutting unit circuit relief
valve R2.
6. Sit on the seat and start the engine. Move throttle to
full speed (3200 RPM).
WARNING
Keep away from all reels during test to prevent per-
sonal injury from rotating reel blades.
Reelmaster 6500-D/6700-D
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1. Test Port G1 (front)
7. 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 (front): 3000 +/- 50 PSI.
GAUGE READING (RM 6500--D rear):
2000 +/- 50 PSI.
GAUGE READING (RM 6700--D rear):
3000 +/- 50 PSI.
8. Stop the engine. If pressure is too high, remove cap
on relief valve R1 or R2 and adjust screw to get correct
pressure (see Adjust Manifold Relief Valves). If pressure
is too low, check for restriction in pump intake line. Re-
move cap from relief valve R1 or R2 and adjust screw to
get correct pressure. If pressure is still too low, pump or
reel motor should be suspected of wear, damage or inef-
ficiency.
Note: Normal operating pressure when mowing is
approximately 500 to 600 PSI. per cutting unit. The front
circuit should operate at 1500 to 1800 PSI. and the rear
circuit should operate at 1000 to 1200 PSI. for 6500-D
and at maximum circuit pressure for 6700-D.
Page 4 - 39 Rev. B
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Figure 15
2. Test Port G2 (rear)
Figure 16
Hydraulic System