Troubleshooting; Tractor Will Not Operate In Either Direction Because The Engine Bogs Down Or Stalls; Tractor Goes Forward Only At Partial Speed And Is Slow Or Does Not Operate In Reverse; Tractor Will Not Operate In Either Direction - Toro 520XI Service Manual

Whenever a problem occurs with the hydrostatic drive system, you should always check
these items first:
1. Transmission oil is at proper level and air is bled from system.
2. Make sure the high-low speed lever is not in neutral.
3. Speed control linkage is functioning properly.
4. Cruise control is turned off.
Tractor will not operate in either direction because the engine bogs down
or stalls.
Possible Cause
Low transmission oil level
Motion control linkage
The brake is sticking
Brake adjustment it too tight
Tractor goes forward only at partial speed and is slow or does not operate
in reverse.
Possible Cause
The cruise control was engaged when the High-Low
range lever was in "N."
The engine is running at partial speed
The Linkage is out of adjustment
There is Internal hydro wear
Tractor will not operation in either direction.
Possible Cause
The transmission oil is low
The control linkage needs adjustment or replacement
The parking brake was not released or the parking
brake is not releasing
The drive shaft or wheel hub key has been damaged
Faulty transmission/transaxle
The power steering filter is dirty
5xi Series Tractor Service Manual
HYDROSTATIC DRIVE
Corrective Action
Fill to full "F" mark on dipstick (when trans. is cold)
Adjust, repair, or replace
Repair linkage; replace brake assembly
Adjust the brake
Corrective Action
Turn the cruise control off
Move the throttle to "FAST."
Verify full motion is obtain on motion control shaft.
Adjust if necessary.
Repair/replace transmission
Corrective Action
Fill to full "F" mark on transmission oil dipstick when
transmission is cold
Adjust, repair, or replace
Release the parking brake or check the linkage
Replace
Repair/replace transmission/transaxle
Clean power steering filter

TROUBLESHOOTING

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