11
Model 70342 and 70344
Appendix B -
Rotating Kit Assembly
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. 3/8 in. I.D. x 1-1/8 in. O.D. flat washers
1 ea. 3/8 in. x 3-1/4 in. N.C. cap screw, and
1 ea. 3/8 in. N.C. nut
To remove spring, place one of the flat washers over the 3/8 in.
x 3-1/4 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. Remove 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 it 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 3/8 in. I.D. washers, nut, and 3/8 in. x
1-1/4 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, the spider on the pivot,
and the piston assemblies through the spider and into the
piston block, resting on spider.
9-1
9-2
9-3
9-5
9-4
9-6
9-7
9-8
9-9
9-7
9
Item Qty. Description
9 1 Rotating Kit Assy.
9-1 9 Piston Assembly
9-2 1 Spider
9-3 1 Spider Pivot
9-4 1 Retainer
9-5 1 Piston Block
9-6 3 Pins
9-7 2 Washer
9-8 1 Spring
9-9 1 Retaining Ring
