TM 5-4310-384-13
DISASSEMBLY.
CAUTION
Pistons, connecting rods, piston pins, and caps are matched parts and seat with the operation of the
compressor. They must keep their original positions at reassembly. Mark each component to be sure they
match when they are reassembled.
NOTE
Maintenance for the two low pressure pistons is identical.
a.
Clamp connecting rod assembly in vise or suitable fixture. Be careful not to score pistons.
b.
Remove piston rings (1) from piston (2).
c.
Using suitable pliers, squeeze retaining rings (3) and remove from piston.
d.
Push out piston pins (4) and remove pistons (2) from connecting rods (5).
e.
Remove capscrews (6) and rod caps (7) from connecting rod.
ASSEMBLY.
CAUTION
Pistons, connecting rods, piston pins, and caps are matched parts and seat with the operation of the
compressor. They must keep their original positions at reassembly. Mark each component to be sure they
match when they are reassembled.
NOTE
Coat all parts with oil before assembly.
a.
Attach capscrews (6) and rod caps (7) to connecting rods (5). Secure nuts finger-tight.
b.
Clamp connecting rod (5) in vise or suitable fixture and position piston (2) on connecting rod.
c.
Attach piston (2) by installing piston pins (4) through holes in pistons and connecting rods.
d.
Center piston pins (4) and install retaining rings (3) in grooves on pins. Be sure retaining rings are properly
seated in grooves.
CAUTION
Piston rings must be installed correctly. The oil ring must be in the lowest groove.
e.
Install piston rings (1) on pistons.
4-9
