Vogt P-34AL-15, Service Manual

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P34AL-15 & P34ALOF-15 Service Manual
SERVICING OPERATIONS
9/22/05
9-26
Reasons for premature wear.
1. Pulley misalignment
2. Belts not matched
3. Dirt or foreign material present
4. Excessive slipping (loose tension)
Belt Replacement . Belts that are worn, cracked, frayed, or over stretched should be replaced.
1. Remove the belt guard and loosen motor hold-down bolts.
2. Move the motor and sheave closer to the compressor until there is enough slack to remove the
old belts.
3. Remove the old belts and clean the sheave grove if necessary with non-flammable, non-toxic
degreasing agent or commercial detergent.
4. Install new belts by rotating the belt and sheaves to obtain seating in the grooves.
Note: on drives having more belt grooves in the sheaves than needed, use the grooves closest to
the motor and compressor. Make sure that the belts are all slack on the same side of the drive,
preferably the bottom, prior to tightening.
5. Move the sheaves apart until the belts are snug.
6. Check the motor and compressor shafts to make sure they are parallel, and check the flywheel
and motor sheave with a straight edge, string, or wire to make sure they are parallel and in the
same plain. Make adjustment as required.
7. Adjust tension following these guidelines:
a) Best tension is the lowest tension at which the belts will not slip under the highest load
condition.
b) Check tension after the first two to four hours and again after 24 to 48 hours of operation,
then periodically thereafter.
c) If a belt slips, tighten it.
8. Retighten motor hold-down bolts after each adjustment.
Compressor Servicing . Refer to your compressor manual for specific instructions regarding repair
and servicing of internal parts. It is important to be familiar with the operation and function of your
equipment so you can provide the best possible service.