Procedure for Cutting Deck Manifold Relief
Pressure Test
11.If specification is not met, adjust or clean relief valve
in deck manifold port (R1BY). Adjust relief valve as fol-
lows:
1.
Make sure hydraulic oil is at normal operating tem-
perature by operating the machine for approximately 10
minutes. Make sure the hydraulic tank is full.
NOTE: Do not remove valve from the hydraulic man-
ifold for adjustment.
2.
decks lowered and off. Make sure engine is off and the
parking brake is engaged.
Park machine on a level surface with the cutting
A. Remove cap on relief valve with an allen wrench.
B. To increase pressure setting, turn the adjust-
ment screw on the valve in a clockwise direction. A
1/8
in relief pressure.
turnonthescrewwillmakeameasurablechange
CAUTION
C. To decrease pressure setting, turn the adjust-
mentscrew onthevalve inacounterclockwise direc-
tion. A 1/8 turn on the screw will make a measurable
change in relief pressure.
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.
D. Reinstall and tighten cap to secure adjustment.
Recheck relief pressure and readjust as needed.
3.
Locate deck manifold to be tested (Fig. 26). Discon-
nect hydraulic hose at deck manifold port (MP).
12.Disconnect
tester from manifold and hose. Recon-
nect hydraulic hose that was disconnected for test pro-
cedure.
NOTE: An alternative to using manifold port (MP)
would be to disconnect the inlet hydraulic hose at the
deck motor.
3
TO OIL COOLER
4.
Install tester with pressure gauges and flow meter in
RIGHT
FRONT
series with the the disconnected hose and hydraulic
manifold port (MP) (or motor inlet if hose was discon-
nected at deck motor).
1
5.
Make sure the flow control valve on tester is fully
open.
2
6.
After installing tester, start engine and run at idle
speed. Check for hydraulic leakage and correct before
proceeding with test.
CAUTION
Figure 26
1.
2.
Center deck manifold
LH wing deck manifold
3.
RH wing deck manifold
Keepawayfromdecksduringtesttopreventper-
sonal injury from the cutting blades.
7.
gage the cutting decks.
Operate engine at full speed (2730 + 30 RPM). En-
3
2
1
8.
the flow control valve to fully closed.
Watch pressure gauge carefully while slowly closing
9.
As the relief valve lifts, system pressure should be
approximately:
3000
2000
PSI for the center deck and left wing deck
PSI for the right wing deck
Figure 27
3.
10.Disengage
test results.
cutting decks. Shut off engine. Record
1.
2.
Deck manifold
Relief valve
Relief valve cap
Groundsmaster 4100--D
Page 4 -- 33
Hydraulic System
| Categories | Lawn Mower Manual, Sprinkler and Irrigation Manuals, Toro Sprinkler and Irrigation Manuals |
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