Multi Pro 5700 - Toro
Multi Pro 5700 - Toro
Multi Pro 5700 - Toro
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Pulse Width Modulated (PWM) Valve Flow Test<br />
1. Make sure hydraulic oil is at normal operating temperature<br />
by operating the machine for approximately 10<br />
minutes. Make sure the hydraulic tank is full.<br />
2. Park machine on a level surface, stop engine, engage<br />
parking brake, and remove key from the ignition<br />
switch. After turning engine off, operate all hydraulic<br />
controls to relieve hydraulic system pressure.<br />
3. Perform the Gear Pump Flow Test. Make sure that<br />
spray motor circuit hydraulic flow has been tested and<br />
recorded.<br />
CAUTION<br />
Prevent personal injury and/or damage to equipment.<br />
Read all WARNINGS, CAUTIONS, and Precautions<br />
for Hydraulic Testing at the beginning<br />
of this section.<br />
10.Using the application rate switch, increase the spray<br />
rate slightly while monitoring the flow tester. Check for<br />
hydraulic leakage and correct before proceeding with<br />
test.<br />
11. With the engine still running at high idle, increase the<br />
spray rate with the application rate switch while monitoring<br />
the flow tester. As the spray rate is increased, hydraulic<br />
flow should increase as well. At maximum spray<br />
rate, hydraulic flow on the tester should approach spray<br />
motor circuit hydraulic flow previously tested and recorded.<br />
If hydraulic flow does not increase correctly, either<br />
the the circuit wiring to the PWM Valve solenoid or<br />
the PWM Valve is faulty.<br />
12.Disconnect tester from PWM Valve CF port fitting<br />
and hydraulic hose. Reconnect hose to fitting.<br />
13.If the machine has a <strong>Pro</strong> Control System installed, reconnect<br />
the <strong>Pro</strong> Control console computer.<br />
4. Disconnect hydraulic hose from the CF port fitting in<br />
the PWM Valve (Fig. 22).<br />
IMPORTANT: Make sure that the oil flow indicator<br />
arrow on the flow meter is showing that the oil will<br />
flow from the PWM Valve CF port, through the tester,<br />
and into the hydraulic hose.<br />
1<br />
2<br />
5. Install tester with pressure gauges and flow meter in<br />
series with the CF port fitting and the disconnected hydraulic<br />
hose. Make sure the tester flow control valve<br />
is fully open.<br />
6. Make sure that spray tank has sufficient fluid for<br />
agitation. Make sure that spray pump is turned off.<br />
7. If the machine has a <strong>Pro</strong> Control System installed,<br />
disconnect the <strong>Pro</strong> Control console computer.<br />
Figure 22<br />
1. PWM Valve 3. PWM Valve solenoid<br />
2. CF port fitting<br />
3<br />
8. Start engine and move throttle to high idle speed<br />
(3050 – 3150 RPM). The flow meter should indicate<br />
little, if any, hydraulic flow (less than 1 GPM) from the<br />
PWM Valve CF port.<br />
A. If higher flow exists, stop engine, disconnect the<br />
PWM Valve solenoid connection from the machine<br />
harness and retest. If higher flow still exists, the<br />
PWM Valve should be replaced. If flow decreases to<br />
less than 1 GPM after solenoid is disconnected, inspect<br />
spray system electrical components and wiring<br />
before continuing PWM Valve flow test.<br />
9. Make sure that spray booms are off. Turn spray<br />
pump and tank agitation on.<br />
Hydraulic System Page 4 – 24 <strong>Multi</strong> <strong>Pro</strong> <strong>5700</strong>–D