Section 5
MAINTENANCE
20
6. Replace element.
7. Reassemble the housing.
DRIVE COUPLING INSTALLATION AND ALIGN-
MENT
F or coupling installation and alignment, the tools
required will be a straight edge, a measuring scale,
one set of feeler gauges, one set of standard Allen
wrenches, and one set of standard socket
wrenches.
For installation and alignment of the drive coupling,
follow the steps explained below.
STEP 1 MOUNT HUBS -Mount the motor hub and
the compressor hub on its respective shaft.
STEP 2 OFFSET ALIGNMENT -Position hubs for
approx. coupling gap and align shafts so that a
straight edge will rest squarely (or within the 0.010
maximumlimitshownabove)onbothflangesand
at a point 900 away. The vertical offset alignment is
adjusted by the addition or removal of motor
mounting shims. Loosen the motor mounting bolts
and slide the motor sideways to correct the hori-
zontal offset.
STEP 3 COUPLING GAP AND ANGULAR ALIGN-
MENT -Position the hubs to establish the proper
gap and angular alignment as indicated in Table
5A. To determine the angular misalignment in inch -
Figure 5-7 Thermal Valve
Figure 5-8 Drive Coupling Shaft Alignment
es, measure the maximum space between the hub
flanges and the minimum space 1800 away, and
then subtract. To adjust t he horizontal angular mis-
alignment, loosen the motor mounting bolts and
adjust the motor position until the angular align-
ment is within tolerance. Note: Do not upset the off-
set alignment or hub gap w hen adjusting motor
position. When within t he limits specified in Table
5A, tighten the motor mounting bolts and recheck
the offset and angular alignment. If the vertical an-
gular alignment is not within t he .010 tolerance,
shim the front or rear of the motor separately to cor-
rect. Recheck the vertical offset.
Max. Operating Misalignment
Tightening
Tor q u e
ft.-lbs.
Coupling
Gap
inches
Parallel
Offset
inches
Angular
inches
200 2.969 + .030
--- . 0 0 0
.010 .010
(I) Angular misalignment in inches equals
maximum A minus minimum B as shown in
Figure 5-8. DO NOT exceed values in Table
above.
(I)
Table 5A - Installation Data (Series 32 Couplings)
STEP4INSTALLTHEFLEXIBLEELEMENT-Insert
the flexible element between the two hubs. The ele-
ment should be compressed prior to insertion. The
element can be compressed by tightening a suit-
able sized radiator hose clamp around the outer
edge of the element as shown in Fig. 5-9. Slide the
hex head bolts with lockwashers through the holes
in the hubs and element. Tighten the bolts to 200
Ibs./ft. Note: Bolts are 5/8-18 SAE Grade 5, cad-
mium plated - Do not substitute with any other
bolts. After tightening the hex bolts, tighten the
shaft setscrew s and remove the hose clamp from
the flexible element. At this time. the coupling IS
ready for operation.
To Next Page
Loading...
