Junior II WT
Page 52
1st ed. Rev 0 Chg 3
BAUER
COMPRESSORS
6.3
Compressor Drive System
6.3.1
Description
The prime mover which is an electric motor, drives the compressor with a V-belt. The prime mover is
mounted on an adjustable base plate and requires periodic adjustment to ensure proper V-belt tension.
6.3.2
Checking the Drive Belt
1. The proper belt tension for the V-belt is where the belt does not slip under a full load.
2. A rough value for this is when the V-belt deflects Approximately 3/8” (10mm) when pressed with
thumb pressure between the two pulleys. See Figure 6-3.
3. Readjust a new V-belt after the first twenty-five operating hours.
4. Check for damage or wear every 125 operating hours.
6.3.3
V-belt Tension Adjustment
1. Slightly loosen the bolts holding the prime mover onto the base plate.
2. Adjust motor position until the V-belt tension is correct.
3. Tighten the prime mover mounting bolts.
4. Operate the unit for approximately five minutes. Stop the prime mover, check V-belt tension and
readjust if necessary.
5. After the V-belt tension is correct and the prime mover mounting bolts are tight, check to verify that
both pulleys are aligned. This is necessary to avoid excessive wear on the V-belt and pulleys.
6. Hold a straight edge against the compressor and prime mover pulleys as shown in Figure 6-4. The
straight edge must touch the pulleys at the four points indicated by the arrows. If it does not, adjust
the prime mover position until it does.
6.3.4
Electric Maintenance
The electric motors require no maintenance except for external cleaning. For the safety of the operating
personnel all voltage carrying parts have protective covers.
Figure 6-3
Checking V-belt Tension
Figure 6-4
V-belt Pulley Alignment
Approximate Deflection
3/
8
" (10mm)
