TM 5-3895-359-14&P
Place the fixed swashplate over the shaft-bearing
assembly and place into housing locating the notch in
the swashplate on the pin in the housing.
Prior to reassembly of the cylinder block, inspect the
pistons for contamination or excessively worn slipper
pads. Replace any pistons that are found to be
defective.
Two types of pistons have been used in 20 Series
pumps and motors. Prior to any piston replacement it is
necessary to check the construction of all pistons in the
cylinder to determine if they are the welded steel or
plastic filled type. Replacement of plastic filled pistons
with welded pistons may be accomplished by following
the procedure outlined below. Plastic filled pistons may
not be used to replace welded piston assemblies.
When replacing plastic filled pistons with welded
pistons during overhaul or repair of a unit, it is
mandatory that the welded pistons be incorporated
symmetrically in multiples of three (either three, six, or
all nine). See illustrations.
Do not replace welded piston assemblies with plastic
filled piston assemblies; however, any plastic filled
piston assemblies that you have in inventory can be
used to replace existing plastic filled pistons that y6u
may encounter.
6-28
