1 1
1 1
Model 70142 / 70144 and 70145
Appendix B -
Rotating Kit Assembly
4-1
4-2
4-3
4-5
4-4
4-6
4-7
4-8
4-9
4-7
4
Item
Qty.
Description
4-1
9
Piston assemblies
4-2
1
Spider
4-3
1
Spider Pivot
4-4
1
Retainer
4-5
1
Piston Block
4-6
3
Pins
4-7
2
Washer
4-8
1
Spring
4-9
1
Retaining Ring
Disassembly -
Rotating Kit Assembly
Disassembly of rotating assembly is required for inspection
only.
1
Remove the nine piston assemblies, spider, and spider
pivot from piston block.
Inspection:
• Examine the O.D. of the pistons for finish condition.
They should not show wear or deep scratches. Inspect the
shoes for a snug fit on the ball end of the pistons and a flat
smooth surface that comes in contact with the camplate. Do not
lap piston shoes.
• Examine the spider for wear in the pivot area.
• Examine the pivot to insure smoothness and no signs
of wear.
• Inspect the piston block surface that makes contact
with valve plate. This surface should be smooth and free of
deep scratches. Do not lap piston block.
• The pistons should move freely in the piston block
bore. If not free moving, examine the bore for scoring or
contamination.
2
To inspect pins and spring Caution should be taken in
removing spring. The spring is highly compressed and the
retaining ring should not be removed without compressing the
spring safely.
The following parts are required to disassemble the piston
block:
2 ea.
5/16 in. I.D. x 15/16 in. O.D. flat washers
1 ea.
5/16 in. x 2-7/8 in. N.C. cap screw, and
1 ea.
5/16 in. N.C. nut
To remove spring, place one of the flat washers over the 5/16
in. x 2-7/8 in. cap screw. Put cap screw through the center of
the piston block and apply the second washer. Let washer rest
on the three pins and retain with nut. Turning nut and
compressing spring inside the block. Use a pair of retaining ring
pliers and remove the internal retaining ring. Remove nut, bolt,
and the two washers from block. Removing the washer, spring,
second washer, three pins, and pin keeper at the same time.
Reassembly -
Rotating Kit Assembly
1
To reassemble the rotating kit assembly complete the
following: Compress the pin keeper and install in the spline of
the piston block. Install the three pins with head end to the
inside of the block and position in the special grooves of the
piston block spline.
2
Install the washer, spring, and second washer into the
piston block. Use the two 5/16 in. I.D. washers, nut, and 5/16
in. x 2-7/8 in. cap screw to compress the spring and retain with
retaining ring. Remove the nut, cap screw, and the two
washers.
3
Install the pivot onto the three pins, spider on the pivot,
and piston assemblies thru the spider and into piston block,
resting on spider.