Service Manual

27
BDP-10A/16A/21L
REMOVAL, INSPECTION AND AS-
SEMBLY OF THE CYLINDER BLOCK
BDP-10A
Refer to Figure 25.
Disassembly BDP-10A
1. Tilt the BDP on its side, drain remaining oil.
Lift out the cylinder block assembly (25).
2. Remove the pistons, springs and piston seats.
Inspection BDP-10A
1. Inspect the running surface of the cylinder
block and piston ends for damage, nicks or un-
usual wear patterns. The running surface may
show evidence of minor abrasion . This will be a
normal wear. If grooved or smeared, replace with
a new cylinder 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.
25
Piston
Piston
Seat
Spring
Cylinder
Block
Figure 25. BDP-10A
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.
Assembly BDP-10A
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 (25) with pistons con-
tacting the thrust bearing.