Service Manual

18
The hydrostatic transmission will provide trouble
free operation if it is serviced and maintained prop-
erly. There are, however, a few simple items that
are often overlooked when poor performance is
evident.
1. The “ no-load” engine RPM. setting is too slow.
2. Worn, loose or misadjusted linkage is not posi-
tioning the swash plate actuating arm far enough,
even though the traction control pedal or hand
lever is fully pushed.
3. The tow or bypass valve is partially open, letting
oil bypass in the main system.
4. The hydraulic oil filter or inlet line is not tight-
ened sufficiently; air is being drawn in past the filter
seal into the charge pump, and then into the main
circuit. Air in the hydraulic system will cause cava-
tion and damage the rotating components.
NOTES
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