Procedure for Cutting Deck Circuit Pressure Test
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.
1
1.
2
2.
lowered and off. Make sure engine is off and the parking
brake is engaged.
Parkmachineonalevelsurfacewiththecuttingunits
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.
GM 4500--D DECK CONTROL MANIFOLDS
Figure 28
1.
Test port (decks 2, 3, & 5)
2.
Test port (decks 1 & 4)
3.
deckcontrol manifoldtestportforthegearpumpsection
to be tested (Fig. 28 or 29).
Install test gauge with hydraulic hose attached to
CAUTION
1
2
Keepawayfromdecksduringtesttopreventper-
sonal injury from the cutting blades.
4.
50
Start engine and move throttle to full speed (2800 +
RPM). Engage the cutting units.
GM 4700--D DECK CONTROL MANIFOLDS
Figure 29
5.
the machine.
Watch pressure gauge carefully while mowing with
1.
Test port (decks 2,3,5,7)
2.
Test port (decks 1,4,6)
6.
3500
tions.
Cutting deck circuit pressure should be from 1000 to
PSI and will vary depending on mowing condi-
#4
Deck
#1 Deck
#5 Deck
7.
Disengage cutting units. Shut off engine.
8.
Disconnect test gauge with hose from manifold test
port.
#
2
#3
Deck
#
6 Deck
#7 Deck
(GM4700)
Deck
(GM4700)
CUTTING DECK LOCATIONS
Figure 30
Groundsmaster 4500--D/4700--D
Page 4 -- 31
Hydraulic System (Rev. A)
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