Compound 2-Stage Screw Compressor 1612Lsc Speed Increaser Type; Inspection - mycom 1612LSC series Instruction Manual

b) Since the 1612C model has a balance piston sleeve attached to the high-stage, remove the
hexagon socket head cap screws [34] for stopping the balance piston sleeve [33] from rotating.
Make sure not to lose the attached special spring washer [335] for the hexagon socket head cap
screw.
Rotation Stopping Part
for Balance Piston Sleeve
c) By using internal snap ring pliers, remove the snap ring [37] for securing the balance piston sleeve.
Since the snap ring is pushed out by the inner O-ring, it can be removed easily by pushing gently.
d) Pull out the balance piston sleeve. The sleeve can be removed easily because the gap between its
outer diameter and the suction cover is loose.
5.4.10.2

Inspection

Although there are signs of wear on the inner surface of the balance piston sleeve, this is not a problem.
They result from the fact that the gap between the balance piston and the piston sleeve is smaller than
the gap between the rotor shaft and the bearings.
These wears will not develop further, because a large gap is created around the outer circumference of
the balance piston sleeve in order to prevent the bearing load from being applied to the balance piston.
However, you should still carefully check the condition because when the side bearing is significantly
worn, the balance piston may also be worn.
Compound 2-stage Screw Compressor
1612LSC Speed Increaser Type
Loosen Hexagon Socket Head Cap Screw
5.4 Disassembly and Inspection
5-30
2202L5JE-DA-C5-N_2015.05.
5 Maintenance and Inspection
for Rotation Stop