Charge Hydraulic System
NOTE: When initially starting the hydraulic system with
new or rebuilt components such as pumps, motors 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.
11.After the hydraulic system starts to show signs of fill,
actuate lift control switch until the lift cylinder rods move
in and outseveral times. Ifthecylinder rods do notmove
after 15 seconds or the pump emits abnormal sounds,
shut the engine off immediately and determine cause or
problem. Inspect for the following:
IMPORTANT: Change hydraulic oil filter whenever
hydraulic components are repaired or replaced.
A. Loose filter or suction lines.
B. Blocked suction line.
C. Faulty charge relief valve.
D. Faulty gear pump.
1.
decks, stop engine and engage parking brake. Remove
key from the ignition switch.
Park machine on a level surface. Lower cutting
2.
Make sure all hydraulic connections, lines and com-
ponents are secured tightly.
12.Once
lift cylinders do move, proceed to step 13.
thetractionpedalintheforwardandreverse
3.
Ifcomponentfailurewassevereorthesystemiscon-
taminated, flush and refill hydraulic system and tank
(see Flush Hydraulic System in this section).
13.Operate
directions. The wheels off the ground should rotate in
the proper direction.
4.
draulic oil if necessary.
Make sure hydraulic reservoir is full. Add correct hy-
A. If the wheels rotate in the wrong direction, stop
engine and inspect hydraulic line placement at pis-
ton (traction) pump and wheel motors. Correct hy-
draulic line installation before proceeding.
5.
solenoid to prevent the engine from starting.
Disconnect wire harness connector from engine run
B. If the wheels rotate in the proper direction, pro-
ceed with procedure.
6.
proper adjustment, binding or broken parts.
Check control rod to the piston (traction) pump for
14.Adjust
15.Check
traction pedal to the neutral position.
7.
Make sure traction pedal is in the neutral position.
Turn ignition key switch to start and engage starter for
ten (10) seconds to prime the traction and gear pumps.
Let starter cool and then repeat cranking procedure
again.
operation of the traction interlock switch.
16.Stop
engine, remove blocks from frame and lower
machine. Remove chocks from remaining wheels.
8.
noid.
Connect wire harness connector to engine run sole-
17.If
replaced or rebuilt, run the machine so all wheels turn
slowly for ten (10) minutes.
the piston (traction) pump or a traction motor was
WARNING
18.Operate
load to full over a ten (10) minute period.
machine by gradually increasing its work
Beforejackingupthemachine,reviewandfollow
Jacking Instructions in Chapter 1 -- Safety.
19.Stop
ifnecessary.Check hydraulic components for leaks and
tighten any loose connections.
the machine. Check hydraulic reservoir and fill
9.
Raise one front and one rear wheel off the ground
and place support blocks under the frame. Chock re-
maining wheels to prevent movement of the machine.
10.Make
sure traction pedal is in neutral. Start engine
and run itatlow idle (1425 rpm). The pumps should pick
up oil and fill the hydraulic system. If there is no indica-
tion of fill in 30 seconds, stop the engine and determine
the cause.
Hydraulic System
Page 4 -- 70
Groundsmaster 4500--D/4700--D
| Categories | Lawn Mower Manual, Sprinkler and Irrigation Manuals, Toro Sprinkler and Irrigation Manuals |
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| Language | English |
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