Charge Hydraulic System
NOTE: When initially starting the hydraulic system with
new or rebuilt components such as motors, pumps or lift
cylinders, it is important that the hydraulic system be
charged properly. Air must be purged from the system
and its components to reduce the chance of damage.
10.Make sure traction pedal and lift control lever are in
neutral. Start engine and run at low idle speed (1750
RPM). The charge pump should pick up oil and fill the
hydraulic system. If there is no indication of fill in 30 se-
conds, stop the engine and determine the cause.
IMPORTANT: Change hydraulic oil filter whenever
hydraulic components are repaired or replaced.
11.After the hydraulic system starts to show signs of fill,
actuate lift control lever until the lift cylinder moves in
and out several times. If the cylinder does not move after
1.
Position machine on a level surface with the engine
10
to 15 seconds or if the pump emits abnormal sounds,
shut the engine off immediately and determine cause or
problem. Inspect for the following:
off.
2.
Make sure all hydraulic connections, lines and com-
ponents are secured tightly.
A. Loose filter or suction lines.
3.
system is contaminated, flush and refill hydraulic sys-
tem and tank (see Flush Hydraulic System).
If component failure was severe or if the hydraulic
B. Incorrect hydraulic hose routing.
C. Blocked suction line.
4.
essary (see Operator’s Manual).
Make sure hydraulic tank is full. Add correct oil if nec-
D. Faulty charge relief valve in hydrostat.
E. Faulty charge pump (gear pump P1).
5.
ment, binding or broken parts.
Check traction rod to the hydrostat for proper adjust-
12.If
step 13.
lift cylinder moves in 10 to 15 seconds, proceed to
6.
prevent the engine from starting.
Disconnect and ground engine spark plug wires to
13.Operate
directions. The wheels off the ground should rotate in
the proper direction.
the traction pedal in the forward and reverse
7.
Make sure traction pedal and the lift control lever are
in the neutral position. Turn ignition key switch to
START; engage starter for ten (10) seconds to prime
the traction and charge pumps. Repeat this step again.
A. If the wheels rotate in the wrong direction, stop
engine, remove lines from top of hydrostat pump and
reverse the connections.
8.
Connect spark plug wires to spark plugs.
B. If the wheels rotate in the proper direction, stop
engine.
WARNING
14.Adjust
traction pedal to the neutral position (see Op-
erator’s Manual).
Before jacking up the machine, review and follow
Jacking Instructions in Chapter 1 – Safety.
15.Check and adjust traction neutral switch (see Opera-
tors Manual).
9.
Raise front wheel and one rear wheel off the ground
and place support blocks under the frame. Chock re-
maining rear wheel to prevent movement of the ma-
chine.
16.Lower
wheel.
machine to ground. Remove chock from rear
17.If
the traction pump or a wheel motor was replaced
or rebuilt, run the traction unit so all wheels turn slowly
for 10 minutes.
CAUTION
18.Operate
machine by gradually increasing its work
load to full over a 10 minute period.
Front wheel and one rear wheel will be off the
ground. Make sure machine is supported so it
will not move and accidentally fall to prevent in-
juring anyone under machine.
19.Stop
the machine. Check hydraulic oil level and ad-
just if necessary. Check hydraulic components for leaks.
Tighten any loose connections.
Hydraulic System
Page 4 – 36
Sand Pro & Infield Pro 3040/5040
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