CounterbalancePressureTest(UsingPressureGauge)
PRESSURE
GAUGE
FLOW FROM
TO OIL
FILTER
TO HYDRAULIC
RESERVOIR
TO TRACTION PUMP
(CHARGE CIRCUIT)
TO STEERING
UNIT PORT E
RV1
2100 PSI
S2
S4
S5
LC
S3
OR1
.030”
OR4 .046”
S6
OR5
.138”
RV2
1500
S7
S9
S8
50 PSI
CV2
OR2 .055” OR6 .055”
OR7
.088”
4 PSI
CV3
80 PSI
OR8
RV3
S10
.030”
STEERING / DECK LIFT MANIFOLD
5 PSI
CV1
S1
340 PSI
6C5C2C4C3C
G4
CL
BRK
CH1CH2TP1
G1
CF
LS
G2
G3
OR3
.088”
CH3
TO STEERING
UNIT PORT P
GEAR PUMP
TO BRAKE
RELEASE
MANIFOLD
PSI
g287738
Figure53
Thecounterbalancepressuretestwilldetermineifcuttingdeckcounterbalance
pressureiscorrect.
CAUTION
Preventpersonalinjuryand/ordamagetoequipment.Readall
WARNINGS,CAUTIONSandPrecautionsforHydraulicTestingatthe
beginningofthissection.
ProcedureforCounterbalancePressureTest
1.Makesurehydraulicoilisatnormaloperatingtemperature(54to66ºC(130
to150ºF))byoperatingthemachineforapproximatelyten(10)minutes.
Makesurethehydraulictankisfull.
2.Parkmachineonalevelsurface,lowercuttingdecksfully,disengagePTO,
engageparkingbrakeandstopengine.Removekeyfromkeyswitch.
3.Raisehoodtoallowaccesstosteering/deckliftmanifoldthatissecuredto
rightsideframerail.
Groundsmaster
®
5900&5910
Page5–45
HydraulicSystem:Testing
16227SLRevB