Procedure for Cutting Deck Manifold Relief
Pressure Test
10.Disengage cutting units.Shutoffengine. Ifspecifica-
tion is not met, adjust or clean relief valve in deck man-
ifold port (R1BY). Adjust relief valve as follows:
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.
lowered and off. Make sure engine is off and the parking
brake is engaged.
Parkmachineonalevelsurfacewiththecuttingunits
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. 22). Discon-
nect hydraulic hose at deck manifold port (MP).
11.
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 to the
deck motor.
4.
and hydraulic manifold port (MP) (or motor inlet if hose
was disconnected at deck motor).
Installtesterinserieswiththethedisconnected hose
RIGHT
FRONT
3
5.
Make sure the flow control valve on the tester is fully
open.
2
6.
ting. Make sure the flow control valve on tester is fully
open.
Install tester in series with the hose and hydraulic fit-
CAUTION
1
Figure 22
3.
1.
2.
Front deck manifold
LH deck manifold
RH deck manifold
Keepawayfromdecksduringtesttopreventper-
sonal injury from the cutting blades.
3
7.
30
Start engine and move throttle to full speed (2730 +
RPM). Engage the cutting units.
1
8.
Watch pressure gauge carefully while slowly closing
2
the flow control valve to fully closed.
9.
As the relief valve lifts, system pressure should be
approximately:
3000
2000
PSI for the front and left decks
PSI for the right deck
Figure 23
3.
1.
2.
Deck manifold
Relief valve
Relief valve cap
Groundsmaster 4000--D
Page 4 -- 33
Hydraulic System (Rev. B)
| Categories | Lawn Mower Manual, Toro Lawn Mower Manual |
|---|---|
| Tags | Toro Groundsmaster 4000 D |
| Download File |
|
| Document Type | Service Manual |
| Language | English |
| Document File Type | |
| Publisher | toro.com |
| Wikipedia's Page | Toro Company |
| Copyright | Attribution Non-commercial |
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