TM 5-3810-307-24-1-2
Figure I-4. Compressor Rear Bearing O-ring Seal Installation
Piston Assembly Replacement. (Refer to Figure I-5.)
NOTE
This procedure covers the replacement of the Single Cylinder Air
Compressor Piston Assembly, Cummins kit part number 4089210. The
repair kit includes a piston with rings, pin, coolant seals, sump plug,
retainers, gaskets, head bolts, and head and cover gaskets.
Removal.
NOTE
There is no need to remove the air and coolant fittings from the head
assembly unless replacing the head.
a.
Remove the head assembly. Refer to paragraph I-3-1. Remove two head cover screws
and head cover gasket. Retain the head assembly but discard the four large head bolts,
two cover screws, head cover gasket, and head gasket.
b.
Use a large screwdriver to remove the sump plug (1, Figure I-5). Discard the plug.
c.
Rotate the crankshaft until connecting rod cap appears in the access hole.
d.
Remove two Torx head bolts (2). Retain the bolts unless replacing the connecting rod
with the piston.
e.
Remove connecting rod cap (3). Retain the cap unless replacing the connecting rod
with the piston.
f.
Push the piston (4) and connecting rod out of the top of the crankcase by pushing the
bottom of the connecting rod with a wooden dowel.
g.
Remove one piston pin retaining clip (5). Then push out piston pin (6) to separate the
piston (4) and connecting rod (7). Discard the clip, piston pin, and piston but retain the
connecting rod if not replacing the rod.
