Product Manual

MASTERLINE SERIES CAP200

Page 36 of 46 REV H JUNE 2017

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 15. 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.

Fig. (15) 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

Average

Tension

D96, C79

3lb

C89, D97, C98

5lb

C100, C100H

8lb

C200, C260,

C200S, C260H

32lb

C300, C300S,

C300H

32lb

Table (7) Masterline Belt Tensioning

Motor Mounts

Take Up Bolt