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Rev. D
Multi Pro 5700--D Hydraulic SystemPage 4 -- 29
Charge Hydraulic System
NOTE: When initially starting the hydraulic system with
new or rebuilt components such as motors or pumps, it
is important that the hydraulic system be charged prop-
erly. Air must be purged from the system and its compo-
nents to reduce the chance of damage.
IMPORTANT: Change hydraulic oil filter whenever
hydraulic components are repaired or replaced.
1. Position machine ona level surface, engage parking
brake and remove key from the ignition switch.
2. Make sure all hydraulic connections, lines, andcom-
ponents are tight.
3. Ifcomponent failure was severeor the system is con-
taminated, flush and refill hydraulic system and reser-
voir (see Flush Hydraulic System in this section).
4. Make sure hydraulic reservoir is full. Add correct hy-
draulic oil if necessary (see Operator’s Manual).
5. Check control cable to the piston (traction) pump for
proper adjustment, binding, or broken parts.
6. Disconnect wire harness electrical connector from
the engine fuel stop solenoid to prevent the engine from
starting.
7. Make sure traction pedal is in neutral.. Turn ignition
key switch to start; engage starter for ten (10) seconds
to prime hydraulic pumps. Wait fifteen (15) seconds to
allow the starter motor to cool and then repeat cranking
procedure again.
8. Connect wire harness electrical connector to fuel
stop solenoid to allow engine to start.
WARNING
Before jacking up the machine, review and follow
Jacking Instructions in Chapter 1 -- Safety.
9. Raise rear wheels off the ground, and place support
blocks under the frame. Chock front wheels to prevent
movement of the machine.
10.Start engine and run it atlow idle (1200 -- 1250 RPM).
The charge pump should pick up oil and fill the hydraulic
system. If there is no indication of fill in 30 seconds, stop
the engine and determine the cause.
11.After the hydraulic system starts to show signs of fill,
rotate steering wheel until the steering cylinder rod
moves in and out several times. If the cylinder rod does
not move after 15 seconds, or the gear pump emits ab-
normal sounds, shut the engine off immediately and de-
termine cause or problem. Inspect for the following:
A. Loose filter or suction lines.
B. Blocked suction line.
C. Faulty charge relief valve.
D. Faulty gear pump.
12.If cylinder does move in 15 seconds, proceed to
step 13.
13.Operate the traction pedal in the forward and reverse
directions. The rear wheels should rotate in the proper
direction.
A. If the wheels rotate in the wrong direction, stop
engine, remove lines from side of piston (traction)
pump, and reverse the connections.
B. If the wheels rotate in the proper direction, stop
engine.
14.Adjust traction pedal to the neutral position (see Op-
erator’s Manual).
15.Check operation of the neutral switch (see Opera-
tor’s Manual).
16.Remove blocks from frameand lower machine tothe
ground. Remove chocks from front wheels.
17.If the piston (traction) pump or a wheel motor was re-
placed or rebuilt, run the machine so wheels turn slowly
for 10 minutes.
18.Operate machine by gradually increasing it’s work
load to full over a 10 minute period.
19.Stop the machine. Check hydraulic reservoir and fill
if necessary. Check hydraulic componentsfor leaksand
tighten any loose connections.
Hydraulic
System