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The hydrostatic transmission must not be opened during the warranty period.
Defective engine
Defective transmission
Engine speed drops
Drive belt for transverse axle
Transmission overheated
Oil level too low
Repair the engine
Belt worn or oily
Clean or replace the belt
Adjust the belt
Stop and let the transmission cool
down. Clean the cooling fins.
Fill engine oil SAE 10W/30 to
correct level
Engine slows with heavy load
Drive belt
Hydrostatic transmission’s cooling
fan
Pulley on hydrostatic
transmission’s input shaft
Hydrostatic transmission
Bypass valve
The valve’s nozzle in wrong
position
Repair
Lubricate the bearing or replace
the belt adjuster
Replace the belt
Clean or replace the fan
Fill engine oil SAE 10W/30 to
correct level
Check the belt tensioning
mechanism
Worn belt
Damaged impeller or runs against
foreign object
Pulley loose or damaged
Oil level too low
Blocked oil filter
Tighten or change the pulley
Change the oil filter
Abnormal noise in transmis-
sion