Toro 3200, Service Manual

Page: 121 / 274

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 damag-
ing the system or its components from not purging the
system of air.
1. After the hydraulic system components have been
properly installed and if the traction pump was rebuilt or
replaced, make sure traction pump housing is at least
half full of clean hydraulic oil.
2. Make sure all hydraulic connections and lines are
secured tightly.
3. Make sure hydraulic reservoir is full. Add correct oil
if necessary (see Checking the Hydraulic System Fluid).
Drain, flush, and refill hydraulic system reservoir and
change oil filter if component failure was severe or sys-
tem is contaminated.
4. On GR3200, disconnect spark plug leads to prevent
the engine from starting.
5. On GR3200–D, disconnect electrical connector to
the fuel stop solenoid to prevent the engine from start-
ing.
6. After repairs, check control linkage for proper ad-
justment, binding, or broken parts.
7. Make sure traction pedal is in neutral and the cut-
ting unit switch is off. Turn ignition key switch; engage
starter for fifteen (15) seconds to the prime pump.
8. On GR3200, reconnect spark plug leads.
9. On GR3200–D, reconnect electrical connector to
the fuel stop solenoid.
10. Make sure traction pedal is in neutral and the cut-
ting unit switch is off. Start engine and run it at low idle.
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.
CAUTION
Be careful when operating the cutting unit
reels. Contact with the reel or other mov-
ing parts can result in personal injury.
11. After the hydraulic system starts to show signs of fill,
accomplish the following:
A. If a reel motor was replaced or rebuilt, run the
cutting units at the minimum speed setting (under
no load) for 10 minutes in both directions.
B. If a reel motor drive pump was replaced or re-
built, run the cutting units at the minimum speed set-
ting (under no load) for 10 minutes.
C. If a traction pump or a wheel motor was replaced
or rebuilt, run the traction unit so the wheels slowly
turn for 10 minutes.
12. Operate the traction unit and cutting unit by gradual-
ly increasing their work load to full over a 10 minute peri-
od.
13. Stop the machine. Check reservoir and fill if neces-
sary. Check hydraulic components for leaks and tighten
any loose connections.
Hydraulic
System
Greensmaster 3200/3200–D Page 5 – 49 Hydraulic System