Champion Compressors Ltd. Manual No. 975203 Rev H
13
7.4 Mechanical Checks
WARNING: Ensure that the machine is electrically isolated before
checks are made.
7.4.1 Airend Check
Ensure that the airend is not hydro-locked by rotating the driven pulley by
hand through two complete revolutions.
7.4.2 Oil Level Check
Sight glasses are used to check both dynamic and static oil levels on these
models. The upper sight glass is used to check the static oil level, whilst the
lower sight glass is used to check the dynamic level.
Top-ups: Add prescribed grade of oil. Ensure that the oil filler cap is firmly
secured and seated properly on the seal, do not over tension.
7.4.3 Vee Belt Check
Pulley alignment must be checked by using a straight edge to confirm that the
pulley faces are flush, and drive shafts parallel. The maximum misalignment
allowable is 0.5mm.
Check that all belts are seated in their grooves. The belt tension is
maintained by sliding the motor, via adjusting jacking bolts located at the feet
of the motor. Correct belt tension is achieved with the use of a Tensiometer
(Champion Part No. 270965). Refer to Figure 3. Set the large o-ring so that
the o-ring bottom is at the 7mm mark. Ensure that the small o-ring is set at
the zero mark. Hold the top of the Tensiometer and press it at right angles to
the belts, midway between the airend pulley and motor pulley into one of the
v-belts. When the bottom of the large o-ring is level with the top of the other
belts stop pressing it in and read the kilogram figure off the bottom of the
small o-ring. Move the small o-ring back to the zero mark and repeat the
operation for the other belts. Record the results.
Rotate the motor pulley through one complete revolution and measure the
belts again, recording the results. Once again rotate the motor pulley and
take another set of readings. Average three sets of readings to ascertain a
belt tension figure.
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