CA / CT SERIES
CAP600
Page
24 of 30
REV D July 2013
BELT TENSION
CAUTION: Over tightening the v-belt(s) will result in overloading of the motor, and/or belt and
pulley failure. A loose belt will result in an unstable speed, premature belt wear, “throwing”
belts and a high amp draw. To change tension, turn the adjusting bolt at the end of the base,
shown in figure 13. Retighten motor hold-down bolts. Grease both the motor and compressor
pulleys once a year with lithium ball bearing grease.
Proper belt tensioning requires the use of a belt tension gauge to measure belt tension. This
tool is available at your local auto parts or hardware store.
1
2
Fig 14 Motor mounts and take up bolt.
BELT TENSIONING INSTRUCTIONS
1. Loosen the motor mounting bolts, but do NOT remove the nuts. See fig (12) for the
mounting bolt locations. Do NOT attempt to adjust the take-up bolt before loosening all
of the motor mounting bolts, attempting to do so will damage the unit.
2. Consult Table (7) for the appropriate deflection and tension values for Challenge Air units.
Table (8) contains deflection and tension values for CT units.
Model
HP
Gage
Deflection
Average
Tension
Minimum Maximum
CA E57
5
1/4"
10lb
9lb
12lb
CA E50
5
1/4"
10lb
9lb
12lb
CA E57
7.5
1/4"
8lb
7lb
10lb
CA E71
10
3/8"
12lb
11lb
14lb
CA E15
15
3/8"
11lb
10lb
13lb
CA Gas E57
13-14
3/8"
20lb
18lb
23lb
Table (7) Challenge Air Belt Tensioning Guide
1 Motor Mounts
2 Take Up Bolt
