Multi Pro 5700 - Toro

Spray Pump Drive Circuit Relief Pressure Test
1. Make sure hydraulic oil is at normal operating temperature
by operating the machine for approximately 10
minutes. Make sure the hydraulic tank is full.
2. Park machine on a level surface, stop engine, engage
parking brake, and remove key from the ignition
switch. After turning engine off, operate all hydraulic
controls to relieve hydraulic system pressure.
CAUTION
8. Open control valve on tester, slow engine speed and
shut off engine. Record test results.
A. If relief pressure specification is not met, adjust
spray circuit relief valve (Fig. 19) (see Adjust Relief
Valve in the Adjustments section of this Chapter). After
adjustment, retest relief valve pressure.
B. If relief pressure specification is met, disconnect
tester from tee fitting and spray circuit pressure
hose. Reconnect pressure hose to tee fitting.
Prevent personal injury and/or damage to equipment.
Read all WARNINGS, CAUTIONS, and Precautions
for Hydraulic Testing at the beginning
of this section.
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2
IMPORTANT: Make sure that oil flow indicator arrow
on the flow meter is showing that oil will flow from
the pump, through the tester, and into the hydraulic
hose.
3. Clean hydraulic fittings and install tester with pressure
gauges and flow meter in series between the gear
pump tee fitting and the spray motor circuit pressure
hose (Fig. 19). Make sure the tester flow control
valve is completely open.
4. After installing tester, start engine and run at idle
speed. Check for hydraulic leakage and correct before
proceeding with test.
Figure 19
1. Gear pump 3. Spray circuit hose
2. Gear pump tee fitting 4. Spray circuit relief valve
3
5. Adjust engine speed to high idle (3050 – 3150 RPM).
IMPORTANT: The gear pump is a positive displacement
type. If gear pump flow is completely restricted
or stopped, damage to the gear pump,
tester, or other components could occur.
6. Watch pressure gauge carefully while slowly closing
the flow control valve on the tester.
7. System pressure should be approximately 1500 PSI
as the relief valve lifts.
Hydraulic System Page 4 – 22 Multi Pro 5700–D