Test No. 4: Relief Valve (R2) Pressure - Toro Reelmaster 5200-D Service Manual

TEST NO. 4: Relief Valve (R2) Pressure

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 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 G2. Put gauge and hose
through opening in front of hydraulic valve block as
shown, then lower the seat (Fig. 19).
Note: It may be necessary to rotate 90_ fitting in port
G2 so seat can be lowered after pressure gauge with ex-
tension hose is connected. Loosen nut and rotate 90_
fitting in port G2 1/4 turn so test fitting points forward.
Tighten nut to seat O-ring and secure fitting.
4. Set reel speed controls (FC1 and FC2) to position 5.
Make sure backlap switch is OFF.
5. With cutting units in lowered position and engine
OFF, insert a block of wood, as shown in Figure 21, be-
tween cutting unit reel blades and front cross tube of
left-rear (No. 2) cutting unit to prevent reel from turning.
6. Sit on the seat and start the engine. Move throttle to
full speed (3200 RPM).
WARNING
Keep away from reels during test to prevent per-
sonal injury from rotating reel blades.
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 TO BE 1950 to 2050 PSI.
Reelmaster 5200-D/5400-D
1
1. Test port G2
8. Stop the engine. If pressure is too high, remove cap
on relief valve R2 and adjust screw to get correct pres-
sure (see Adjust Manifold Relief Valves). If pressure is
too low, check for restriction in pump intake line. Re-
move cap from relief valve R2 and adjust screw to get
correct pressure. If pressure is still too low, pump or mo-
tor should be suspected of wear, damage or inefficiency.
Note: Normal operating pressure when mowing is
approximately 500 to 600 PSI per cutting unit. Normal
operating pressure of rear circuit (two cutting units)
when mowing is approximately 1000 to 1200 PSI.
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2
Figure 20
2. Test port G1
Figure 21
Hydraulic System