Toro Workman 3000 Series Service Manual page 213

Procedure for High Flow Hydraulic Kit (Optional)
Gear Pump Flow and System Relief Pressure Test
1. Make sure hydraulic oil is at normal operating tem-
perature by operating the vehicle for approximately 10
minutes.
2. Park vehicle on a level surface, raise and support bed
(if installed), shut engine off and engage the parking
brake. After turning engine off, operate all hydraulic con-
trols to relieve hydraulic system pressure.
3. Make sure that drive belt for High Flow Kit gear pump
is adjusted properly (see Kit Installation Instructions).
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.
IMPORTANT: Make sure that the oil flow indicator
arrow on the flow meter is showing that the oil will
flow from the pressure coupler, through the tester,
and into the return (tank) coupler (Fig. 19).
4. With the engine off, install tester with pressure
gauges and flow meter in series between the quick dis-
connect couplings. Make sure the tester flow control
valve is open.
5. Make sure the Hydraulic Kit reservoir is full after con-
necting the tester.
CAUTION
The engine must be running to perform hydrau-
lic tests. To guard against possible personal in-
jury, engage parking brake and keep clothing,
hands, feet, face and other parts of the body
away from fan and other moving parts.
6. After installing tester, start engine and run at idle
speed. Turn hydraulic kit switch ON and check for hy-
draulic leakage from connections. Correct before pro-
ceeding with test.
7. Adjust engine speed with accelerator pedal so High
Flow Kit gear pump speed is 3000 RPM (engine speed
approximately 3600 RPM). Verify pump speed with a
phototac.
Workman 3000/4000 Series
8. With Kit switch still in the ON position, watch tester
pressure gauges while slowly closing flow control valve
on the tester until 1500 PSI (103.4 Bar) is obtained on
gauge. Verify that pump speed continues to be 3000
RPM. Record flow meter reading.
GAUGE READING TO BE: Flow should be approxi-
mately 7.9 GPM (29.9 LPM) at 1500 PSI (103.4 Bar).
9. Open tester flow control valve, turn Kit switch OFF
and stop engine.
10.If pump flow specification is not met, inspect for:
A. Slipping pump drive belt.
B. Worn or stuck relief valve.
C. Pump suction line restriction.
D. Gear pump needs to be repaired or replaced.
11. To test High Flow Hydraulic system relief pressure:
A. Make sure flow control valve on tester is fully
open.
B. Start engine and depress accelerator pedal so
engine is running at high idle (3600 + 50 RPM). Turn
Kit switch ON.
IMPORTANT: Close flow control valve on tester
only enough to get a system relief pressure read-
ing.
C. Watch pressure gauge carefully while slowly clos-
ing the tester flow control valve until the relief valve
opens.
D. System pressure should be approximately 2000
PSI (137.9 Bar) as the relief valve lifts.
E. Open tester flow control valve, release accelera-
tor pedal to allow engine to return to low idle and turn
Kit switch OFF. Turn off vehicle. Record test results.
12.If relief pressure is incorrect, inspect for:
A. Slipping pump drive belt.
B. Worn, stuck or out of adjustment relief valve.
13.Remove tester from quick disconnect couplings.
Page 9 – 23 Hydraulic System