Service Manual

28
BDP-10A/16A/21L
The running surface may show evidence of mi-
nor abrasion . This will be normal wear. If
grooved or smeared, replace with a new cylin-
der block assembly.
2. Inspect the piston springs for distortion or
breakage. If necessary, replace with new cylin-
der block kit.
3. Inspect the piston seats. Residual oil may
cause these to remain stuck to the inside of the
pistons.
Assembly BDP-16A/21L
1. Install piston seats into the end of the pistons.
2. Install springs into the pistons.
3. Install one at a time, pistons, springs and seats
as one assembly into the cylinder block.
4. With the BDP housing tilted on its side, install
the cylinder block assembly (38) so that the
pistons contact the thrust bearing.
NOTE: To check that piston placement
is correct, push downward on the cylin-
der block assembly (38). If this results in
a spring action the block assembly has
been installed correctly. If this cannot be
accomplished, remove and reassemble
the block assembly. Place a rubber band
around the cylinder block pistons to hold
them in position during installation. Then
after installation cut the rubber band and
remove it. Check for cylinder block as-
sembly for spring action.
38
Piston
Seat
Piston
Cylinder
Block
Spring
Figure 26. BDP-16A/21L
REMOVAL, INSPECTION AND AS-
SEMBLY OF THE CYLINDER BLOCK
BDP-16A/21L
Refer to Figure 26.
Disassembly BDP-16A/21L
1. Tilt the BDP on its side, drain remaining oil.
Lift out the cylinder block assembly (38).
2. Remove the pistons, springs and piston seats.
Inspection BDP-16A/21L
1. Inspect the running surface of the cylinder
block and piston ends for damage, nicks or un-
usual wear patterns.
(7x)
(7x)
(7x)