Table of Contents
Advertisement
Attached lifting eyelets on two (2) compressor and one (1) adaptor housing top-side locations.
Remove [lower] access panel on compressor-side of the enclosure, maneuver lifting arm (e.g., fork-
lift blade) above compressor, and attached appropriate chains or straps between the lifting eyelets
and the lifting arm.
Remove (2) fasteners between compressor feet and vibration mounts.
Remove (8) fasteners between motor and adaptor housing flanges.
Lift/Pull away compressor and adaptor housing from motor approximately 4in (101mm) to
disengage coupling hubs and allow removal of spider.
Inspect coupling element for signs of wear and tear such as indentations, cracks, deformation,
extrusions, etc. It is highly recommended that the coupling element be replaced at this time.
If the removal of either coupling hub is necessary, the following steps must be taken prior to lifting the
compressor and adaptor piece:
Drain oil entrained in discharge manifold by placing appropriate collection pan underneath elbow
segment and removing the 1/4" npt plug threaded into elbow. Proceed to drop the flanged, section
of the discharge manifold by removing the bolts from compressor flange.
Remove the following additional components connecting the package to the compressor. Make
sure to identify each line and matching compressor-side connection for proper reassembly – you
may also refer to the Parts List 13-18-506 for more details:
Oil Injection hoses (one (1) base flow, two (2) solenoid valve flow)
Bearing oil lubrication hose
Oil drain nylon tube
Discharge temperature sensor [TT2] cable
Coupling ventilation duct (below adaptor body).
After the inspection/replacement of the spider or hubs is complete, re-assemble the compressor,
adaptor housing and related components in reverse order.
After engaging each hub on the matching recesses of the coupling element, check that the gap
between the hub flats (see dimension "E" on Figure 8-2) is within 1.77/1.89 in (45/48 mm). A
smaller gap will produce abnormal wear of the element by friction and excessive thermal expansion
– the latter could cause compressor damage by axially displacing the input shaft. Make sure that
keys are in proper alignment with key-ways on hubs.
Apply a thread-locking compound to the hub setscrews (M12 size) and tighten to 29.5 lb-ft (40 N-
m) of torque. Reinstall coupling guard with provided fasteners.
Interference-fitted Coupling Hub Removal and Installation – In the event that a coupling hub has to
be removed, please note that these are designed to fit on compressor and motor shafts with a transitional
interference fit. Coupling hubs and their companion shafts which have bore diameters which fall in the
interference range of the design fit, must be removed or installed with the aid of a removal or installation
tool and/or heat dilation. The recommended steps are based on the assumption that the main motor has
been pulled away from the compressor and that the motor adaptor housing is still attached to the
compressor.
13-18-614
Page 55
Advertisement
Table of Contents
