TEST NO. 5: Counterbalance Pressure
IMPORTANT: To prevent damage to test gauge,
raise all decks before connecting 1,000 psi gauge to
LIFT test port.
NOTE:Hydraulicoilmustbeatoperatingtemperature
forthesetestsorpressurereadingwillbetoohigh.
2
COUNTERBALANCE Pressure Test
1
1.
Connecta1,000psigaugetotheLIFTtestport.
a. On machines with serial number below
NOTE: Deck drive Test Ports
on older models are
also on this panel.
250000000,
theLIFTtestportislocatedontheout-
sideofthecontrolconsole(Fig.13).
Figure13
Lift test port (S/N below 250000000)
Traction forward test port
b. On machines with serial number above
1.
2.
250000000,
theLIFTtestportislocatedunderneath
thecenterofthemachine(Fig.14).
2.
Starttheengineandadjustthrottlesoenginespeed
is2,500RPM.
1
TESTERREADINGTOBE:
400
525
to425PSI(S/Nbelow250000000).
to550PSI(S/Nabove250000000).
3.
Ifpressureisincorrect,locatecounterbalancerelief
cartridgeoncontrolmanifold(Fig.15).Removecapon
counterbalance reliefvalveandadjustthereliefvalve
screwuntilcorrectcounterbalancepressureisattained.
“TRACTION PLUS” COUNTERBALANCE Pressure
Test
Figure14
1.
Lift test port (S/N above 250000000)
1.
Connecta1,000psigaugetotheLIFTtestport.
a. On machines with serial number below
250000000,
theLIFTtestportislocatedontheout-
sideofthecontrolconsole(Fig.13).
b. On machines with serial number above
250000000,
theLIFTtestportislocatedunderneath
thecenterofthemachine(Fig.14).
2.
Starttheengineandadjustthrottlesoenginespeed
1
is2,500RPM.MoveGROUNDSPEEDswitchtoHIGH
RANGE.
3.
pedalintheFORWARDdirectionandreadthegauge.
Engage service brake, momentarily push traction
Figure14A
Traction forward test port (S/N above 250000000)
1.
TESTERREADINGTOBE:
600
725
to650PSI(S/Nbelow250000000).
to775PSI(S/Nabove250000000).
4.
Ifpressure is incorrect, locate “Traction Plus” relief
cartridgeoncontrolmanifold(Fig.15).Removecapon
“Traction Plus” relief valve and adjust the relief valve
screwuntilcorrect“TractionPlus”pressureisattained.
Testing
Groundsmaster580--D
Page 4 -- 28
Rev.F
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