Heavy Duty Balanced Opposed Compressors

FOR MODELS: JG AND JGA SECTION 5 - MAINTENANCE
Connecting Rod - Removal
!
CAUTION
TO PREVENT PERSONAL INJURY, ENSURE THAT COM-
PRESSOR CRANKSHAFT CANNOT BE TURNED BY THE
DRIVER OR COMPRESSOR CYLINDER GAS PRESSURE
DURING MAINTENANCE: -- ON ENGINE-DRIVEN COMPRES-
SORS, REMOVE THE CENTER COUPLING OR LOCK THE
FLYWHEEL. -- ON ELECTRIC MOTOR-DRIVEN COMPRES-
SORS, IF IT IS INCONVIENIENT TO DETACH THE DRIVER
FROM THE COMPRESSOR, THE DRIVER SWITCH GEAR
MUST BE LOCKED OUT DURING MAINTENANCE.
BEFORE STARTING ANY MAINTENANCE OR REMOVING
ANY COMPONENTS, RELIEVE ALL PRESSURE FROM THE
COMPRESSOR CYLINDERS. SEE PACKAGER’S INSTRUC-
TIONS FOR COMPLETELY VENTING THE SYSTEM.
!
CAUTION
AFTER PERFORMING ANY MAINTENANCE, THE ENTIRE
SYSTEM MUST BE PURGED WITH GAS PRIOR TO OPERA-
TION, TO AVOID A POTENTIALLY EXPLOSIVE AIR/GAS MIX-
TURE.
1. Remove the top cover from the crankcase and the side covers from the crosshead
guides.
2. Remove the middle spacer bar on a 2-throw frame and the middle bar of each
set of three on a 4- or 6- throw frame.
3. Move the throw to the outer dead center position and remove the locknut, bolt,
end plates, and crosshead pin from the crosshead.
4. Remove the crosshead as described in “Crosshead - Removal” on page 5-5.
Before removing the crosshead, refer to the “CAUTION” on page 5-5.
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