New Holland LS140 Workshop Manual page 201

Camplate
1. Shoes of the motor pistons rotate at high speeds
against the camplate surface at, 1. The surface
must be smooth with no metal flaked away and
no scoring. Circular scratches centered on the
machined surface are due to contamination. If
scratches can be felt with your thumbnail, re-
place the camplate.
2. Check the camplate surface for smearing. The
surface must be smooth and bright with no dis-
coloration or brass color on the flat surface.
Shoe and Piston Assemblies
Replace the rotating group if:
1. The piston skirt area, 1, shows signs of scratches
or wear.
2. The edges of the shoes, 2, are worn (shoe roll)
from contact with the camplate.
3. There is wear on the underside of the slipper, be-
tween the slipper and shoe plate at 3.
4. The shoes have a loose, sloppy fit on the ball end
of the piston at 4.
5. The flat surfaces of the shoes, 5, show metal flak-
ing or deeply scratched. Light or shallow
scratches in the shoes will not cause any harm.
Do not lap the shoes.
Piston Plate (Spider)
1. Check for cracks at the holes for the spherical
washer and shoes at 1. The shoe plate is only
available as part of the rotating group.
2. Check for wear in the area of the slippers, 2. This
area should be flat, smooth and have no grooves.
Check the internal splines of the piston block, 3,
for wear.
Spherical Washer (Pivot), 4
1. Check for wear on the top surface where the pis-
ton plate fits. The spherical washer is only avail-
able as part of the rotating group.
2. Check the sides or rolled area for cracks.
SECTION 29 - HYDROSTATIC TRANSMISSION
29-56
Copyright © New Holland
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