Hydraulic System Start--Up - Toro 04384 Service Manual

Hydraulic System Start- -up
NOTE: When initially starting the hydraulic system with
new or rebuilt components such as motors, pumps or lift
cylinders, it is important that this start--up procedure be
used. This procedure reduces the chance of damaging
the system or its components from not purging the sys-
tem of air.
1. After the hydraulic system components have been
properly installed and if the piston (traction) pump was
rebuilt or replaced, make sure piston pump housing is at
least half full of clean hydraulic oil.
2. Make sure all hydraulic connections and lines are se-
cured tightly.
3. Make sure hydraulic reservoir is full. Add correct oil
if necessary (refer to Operator's Manual for hydraulic oil
recommendations). Drain, flush and refill hydraulic sys-
tem reservoir and change oil filter if component failure
was severe or system is contaminated.
4. Check control linkage for proper adjustment, binding
or broken parts.
5. Disconnect electrical connector to the fuel stop sole-
noid to prevent the engine from starting.
6. Make sure functional control lever is in the neutral
position. Turn ignition key switch to engage starter for
ten (10) seconds to prime the pumps. Allow the starter
to cool for sixty (60) seconds and then repeat this step
again.
7. Reconnect electrical connector to the fuel stop sole-
noid.
8. Make sure functional control lever is in the neutral
position. Start engine and run at low idle speed. The
charge pump should pick up oil and fill the hydraulic sys-
tem. If there is no indication of fill in 30 seconds, stop the
engine and determine the cause.
Greensmaster 3250--D
Be careful when operating the cutting unit reels.
Contact with the reel or other moving parts can
result in personal injury.
9. After the hydraulic system starts to show signs of fill,
accomplish the following:
A. If the gear pump or a reel motor was replaced or
rebuilt, run the cutting units at the minimum speed
setting (under no load) for ten (10) minutes in both
directions.
B. If a piston (traction) pump or a wheel motor was
replaced or rebuilt, run the traction unit so the wheels
slowly turn for ten (10) minutes.
10.Operate the traction unit and cutting units by gradu-
ally increasing their work load to full over a ten (10) min-
ute period.
11. Stop the machine. Check reservoir and fill if neces-
sary. Check hydraulic components for leaks and tighten
any loose connections.
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CAUTION
Hydraulic System