Manual 2003 Rev D p/n 2003
19
05
Installation
A tight or driving fit will force the drive shaft out of
its normal position and cause internal damage. A
loose fit will result in shaft damage or breaking.
Make sure the motor sheave fits correctly and is
properly aligned with the booster sheave.
Adjust motor position on its sliding base so that belt
tension is in accordance with drive manufacturer’s
instructions. Always avoid excessive belt tension.
Recheck tension after the first 24 hours of
operation and periodically thereafter to avoid
slippage and loss of booster speed.
Check the booster after installation and before
applying power by rotating the drive shaft by hand.
If the drive shaft does not rotate freely:
• Look for uneven mounting, piping strain,
excessive belt tension, or coupling
misalignment.
• Check booster at this time to insure oil was
added to the reservoirs.
Setting V-Belt Tension
Proper belt tension is essential to long booster
life.
Figure 5-4
,
Figure 5-5
, and the following
procedures are provided to aid in field-adjusting
V-belts (when the booster is so equipped) for
maximum performance. A visual inspection of the
V-belt drive should yield the appearance shown in
Figure 5-4
.
Factors outside the control of the belt tensioning
system used on an individual booster package
assembly, such as environmental factors and
quality of the belts installed, may contribute to
decreased belt life. Such factors can cause wear
of the belts beyond the ability of the tensioning
system to compensate.
As such, it is recommended to check belt tension
monthly and make any manual adjustments found
necessary.
Too Tight
Slight Bow
Too Loose
20/64” = 5/16”
(8 mm)
20”
(50.8 cm)
8-10 lbs.
(3.6-4.5 kg)
Figure 5-4 – General appearance of a V-belt drive
Too Tight
Slight Bow
Too Loose
20/64” = 5/16”
(8 mm)
20”
(50.8 cm)
8-10 lbs.
(3.6-4.5 kg)
Figure 5-5 – Setting of proper tension for a V-belt drive
1. Turn off and lock out power.
2. Remove the fasteners from the belt guard (if
equipped)
3. Remove the belt guard.
4. Check and adjust the belt tension as
necessary. Tension should be 1/64 in.
deflection per inch of span (0.157 mm
deflection per centimeter of span) between
sheaves, with 8 – 10 lb (3.6 – 4.5 kg) force
applied at the center point of the top section of
belt.
5. Install the belt guard, making sure that all drive
components are free of contact with the guard.
6. Install the belt guard fasteners that were
removed in step 2.
7. Unlock the power and start the booster.
8. Resume normal operation.
