Greensmaster 3300/3400Hydraulic System Page 5 -- 34
Charge Relief Valve Pressure Test (Using Tester with Flowmeter and Pressure Gauge)
ENGINE
GEAR
C
3000
PSI
10.3
RIGHT
AB
AB
.33
.58
1.44
110 - - 150
PSI
G1
G2
A
B
BA
TOP
PORT
BOTTOM
PORT
BACK
PORT
C1
HYDROSTAT
BYPASS
VALVE
1.9 GPM
70 to
MOW = 6.7 GPM AT 3.8 MPH
TRANSPORT = 17.5 GPM AT 10 MPH
PSI
OPTIONAL 3WD
FRONT
PORT
10.3
20.6
3000
PSI
PUMP
100
MOTOR
LEFT
MOTOR
HYDRAULIC
RESERVOIR
FROM
POWER STEERING AND
LIFT CONTROL VALVES
FROM
STEERING VALVE
TO POWER
CONTROL VALVE
TO MOW
PRESSURE
GAUGE
Thetractionchargecircuitis designedtoreplaceloss of
hydraulic fluid from the closed loop traction circuit. The
charge relief valve pressure test will identify if charge
pressure is correct.
Procedure for Charge Relief Valve Pressure
Test:
1. Make sure hydraulic oil is at normal operating tem-
peraturebyoperatingthemachineforapproximatelyten
(10) minutes.
2. Parkmachineonalevelsurfacewiththecuttingunits
lowered. Make sure engine is off and the parking brake
is engaged. Make sure the hydraulic tank is full.
CAUTION
Prevent personal injuryand/or damageto equip-
ment. Read all WARNINGS, CAUTIONS and Pre-
cautions for Hydraulic Testing a t the beginning
of this section.
3. Thoroughly clean junction of hydraulic hose and hy-
draulictubethatrunsunderpiston(traction)pump(Figs.
20or21). Disconnecthydraulic hosefrom thehydraulic
tube.
4. Install a tee fitting between the disconnected hose
and tube. Install a 1000 PSI (70 bar) pressure gauge to
the tee fitting.
5. Make sure that traction pedal, steering wheel and
joystick are in the neutral position.
6. Startengineand runatlow idlespeed.Check forhy-
draulic leakage at pressure gauge and correct before
proceeding with test.
7. Movethrottlesoengineisrunningathighidlespeed.
8. Pressure gauge should read approximately 110 to
150 PSI (7.6 to 10.3 bar).
9. Shut off engine. Record test results.
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