SECTION 6: MAINTENANCE
CAS40P 40 CFM / 100 PSIG
PAGE - 50
®
An Oshkosh Corporation Company
6.4.10.1 TESTING PULLEY ALIGNMENT
In order to confirm that the pulleys are in alignment,
several measurements must be taken to get an accu-
rate account. For measurement point locations refer
to
Figure 6-14
; for tolerance measurements refer to
Figure 6-15
.
1. Place the straight edge
flush
against both the
face of the compressor pulley, and the face of
the hydraulic motor pulley, just
above
the
mounting screws. Make sure the straight edge
overlaps both sheaves as much as possible.
Ideally
the straight edge should be flush to both the
compressor drive pulley and the hydraulic motor pul-
ley. However, a tolerance of no more than a 1/16 inch
clearance is acceptable at either side between the
motor pulley face and the straight edge, depending
on the direction (toward compressor, or toward
cooler) of the skew (see
Figure 6-15
).
2. Place the straight edge
flush
against both the
face of the compressor pulley, and the face of
the hydraulic motor pulley, just
below
the
mounting screws. Make sure the straight
edge overlaps both sheaves as much as
possible.
The tolerance check should be within the 1/16”
acceptable range.
6.4.10.2 ADJUSTING THE MOTOR PULLEY FOR
ALIGNMENT
The motor pulley is positioned, in regard to being
aligned with the compressor pulley, by lateral adjust-
ment of the hydraulic motor’s base bracket. Before
attempting to adjust the motor bracket to align the
motor pulley, the drive belts should first be removed
in order to relieve any tension while aligning the
motor sheave. Consult
Section 6.4.9
to remove the
drive belts.
Refer to
Figures 6-14
through
6-16
. In order to
adjust the motor pulley, the hydraulic motor bracket
must be loosened enough to allow the motor to be
moved laterally into alignment.
1.
Refer to
Figure 6-16
: Loosen, but do not
remove, one or two of the four (4) mounting bolt
sets (capscrews [
C
] and hex locking nuts [
D
]),
fastening the hydraulic motor bracket to the
frame.
KEY
DESCRIPTION
A
HYDRAULIC MOTOR BRACKET
B
FRAME (MOUNTING SURFACE)
C
CAPSCREW (MOUNTING BOLT)
(x 4)
D
HEX LOCKING NUT (x 4)
Figure 6-16: Hydraulic Motor Pulley
Alignment - Lateral Adjustment
A
B
D
C
WARNING
Before performing maintenance:
Shut down machine, relieve all system
pressure and lock out all power, as per
the Safety Section of this manual. If
machine is hot, allow package to cool
before removing any panel.
NOTE THAT THE SYSTEM CAN BE
STARTED REMOTELY:
Always clearly tag the start-up
instrumentation against accidental
system start-ups during maintenance.
Manual #99905382 Rev 02
(JUNE 2018)
