Si50-203
Overhaul Instructions
Semi-Hermetic Single Screw Compressor Version III
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(3) Removing the gate rotor bearing retainer plate
While holding the gate rotor with hand, loosen the bolts. Be careful not to lose gate rotor
adjusting shims (1) mounted between the gate rotor shaft and retainer plate.
Be sure to use the original combination of gate rotor, lower bearing holder, gate rotor
adjusting shims and gate rotor adjusting shims (2). (Do not exchange parts between the
upper and lower sets).
Fig. 4-7 Removing gate rotor bearing retainer plate
(4) Removing the lower bearing holder (upward and downward units)
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In the guide bolt hole, thread the bolt that was used for the lower bearing holder mounting
and lift the lower bearing holder from the casing.
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Remove the shims inserted between the lower bearing holder and casing. (Do not lose
the shims.)
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The lower bearing holder and casing are sealed by an O-ring. Therefore, it may be
difficult to remove the lower bearing from the casing. To separate them, insert two
standard screwdrivers at the flange section at locations opposite from each other, and
slowly twist the screwdrivers, as shown in Fig. 4-8.
Fig. 4-8 Removing lower bearing holder
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In the upward gate rotor, the lower bearing holder falls off when the O-ring is separated.
Therefore, mount long bolts in the casing bolt holes and place a hand below the gate
rotor to support it during removal operation.
Summary of Contents for ZH(C)3LSF
Page 48: ...Si50 203 ii Index...
