13-8-638 Page 37
SECTION 7
BELT DRIVE
Proper drive belt tension and alignment are provided at the factory, however, good practice dictates
checking the drive alignment and tension after shipment and before initial start-up.
Sheaves should align straight across the front with a straight edge. The best tension is just enough
tension to keep belts from “squealing” on start-up.
CAUTION
Excessive belt tension can damage the equipment. Tension the belts as shown
on Figure 7-1, page 39.
REPLACING THE COMPRESSOR BELTS
1.
Disconnect, lockout and tagout the power supply to the starter.
2.
Remove the belt guards.
3.
Using adjusting screws, jack the motor base up to loosen the belt tension. Remove the belts.
4.
Install new belts, tighten belts using the adjust screws. Check for correct belt tension.
5.
Check sheave alignment. (See “SHEAVE ALIGNMENT”).
6.
Assemble the guards.
SHEAVE ALIGNMENT
The sheave alignment and belt tightening system consists of a hinged plate for the motor which is
supported between (2) posts and a slotted platform for the Tempest units. To achieve proper sheave
alignment the sheaves must be adjusted for both parallel and angular alignment. The alignment between
the motor and air-end sheaves should be confirmed with the use of a straight edge. If the sheaves are
properly aligned, the straight edge should touch the two outer edges of each sheave for a total of four
points of contact. Gaps between the outer edges of either of the sheaves and the straight edge indicate
sheave misalignment.
The airend sheave is set in the parallel and angular direction by mounting it on the air-end shaft that is
part of the Tempest unit that is bolted to the platform. The platform has been set in the parallel and
angular directions by its inherent design. The motor sheave is set in the parallel direction by sliding it on
the motor shaft to position it in line with the airend sheave. (Check for alignment with straight edge.)
Note
: It may be necessary to loosen the Tempest unit and slide it in the platform mounting slots to keep
the motor sheave fan blades in the correct position in the cooler orifice ring.
The motor sheave is set in the angular direction by means of (2) jack bolts and the hinged plate. To start
the angular alignment process check to make sure the locking nuts on the jack bolts are loose. The
motor sheave can be aligned in the angular direction to the same plane as the airend sheave by turning
down the jack bolts on one side or the other of the hinged plate. (Check for alignment with straight edge.)
It also may be necessary to use the nuts that are on the jack bolts to push up on one side or the other of
the hinged plate. Note: At this point it may also be necessary to make minor adjustments of the position
Summary of Contents for INTEGRA EFD99B
Page 9: ...13 8 638 Page 2 Figure 1 2 COMPRESSOR ILLUSTRATION 300EFD797 A Ref Drawing...
Page 12: ...13 8 638 Page 5 DECALS 206EAQ077 212EAQ077 218EAQ077 211EAQ077 207EAQ077...
Page 13: ...13 8 638 Page 6 DECALS 216EAQ077 217EAQ077 222EAQ077 221EAQ077 208EAQ077...
Page 29: ...13 8 638 Page 22 Figure 4 3 WIRING DIAGRAM FULL VOLTAGE 303EFD546 D Ref Drawing Page 1 of 2...
Page 30: ...13 8 638 Page 23 Figure 4 4 WIRING DIAGRAM FULL VOLTAGE 303EFD546 D Ref Drawing Page 2 of 2...
