TYM T303HST User Manual

8. Remove thrust plate.
9.Inspect needle bearing in housing,If the
2.Inspect the piston block surface that makes
contact with the valve plate.This surface should
be smooth and free of deep scratches.
3.Check the piston movement in the block bore.If
the pistons are sticky in the bore,examine the
bore for scoring or contamination.
thrust plate
needle bearing
Wear surface
Shoe face
Spider
Pivot
needles remain in the cage and spin freely,
there is no need to replace them,If replacement
is necessary,bearing may be removed with a
bearing driver.
5.HYDROSTATIC PUMP INSPECTION
1. Inspect the bronze side of the valve
plate for wear.Replace the valve plate if
any wear,scoring,or scratched exist.
4.Inspect the outside of the pistons .Replace if
scored or worn.
5.Inspect the shoes.Replace if loosed on the ball
end of the piston,or if shoe face area is worn or
damaged.
6.Inspect the spider.Replace if worn in the area
where it contacts the pivot.
7.Inspect the pivot.Replace if worn or damaged.
8.Examine the machined surfaces of the back
plate.Replace if scored or damaged.
4-29
valve plate

TYM T303HST Specifications

General

Brand	TYM
Model	T303HST
Category	Tractor
Language	English