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Belt Deflection Force
•
If belts are too tight, overload will be put on motor and motor bearings.
MODEL
2475
2545
7100
1. The values given in the "BELT DEFLECTION FORCE" table are calculated for nominal conditions and are provided for reference only. The
required tension may vary due to application, manufacturing variances, component wear, etc. Drive belts must be kept tight enough to
prevent slipping. If belts slip or squeak, they need to be tightened.
2. Belt cross-section can be found printed on the outside surface of the belt.
Torques Values:
High Pressure Head Bolts
Low Pressure Head Bolts
Cylinder Flange Bolts
Frame Cover Bolts
Shaft Cover Bolts
Crankpin Cap Screws
Unloader Cover Screws
High Pressure Inlet Valve Screws
Low Pressure Inlet Valve Screws
High Pressure Outlet Valve Screws
Low Pressure Outlet Valve Screws
Beltwheel Bolt
High Pressure Head Center Bolts
Low Pressure Head Center Bolts
Service Check List
Check V-belts for proper alignment and tightness: The V-belts must be tight enough to transmit the necessary power to the compressor.
Adjust the V-belts as follows:
a. Remove back door to access compressor belt drive. To check and replace belts, remove outside belt guard.
b. Loosen four motor sub-base mounting bolts. Apply pressure with finger to one belt at midpoint span. Tension is correct if top of
belt aligns with bottom of adjacent belt. Make further adjustments if necessary.
c. Use belt adjusting bolts to adjust belt tension. See "Setting Belt Tension" section.
d. Check the alignment of pulleys. Adjust if necessary.
e. Tighten mounting hardware to secure motor on base.
f. Re-install outside belt guard and back door.
47794361 Rev.A
RELEASED 02/Nov/2023 21:18:09 GMT
CAUTION
SPAN
DEFLECTION
18
18
19
2475
75
75
50
17
17
11
-
11-15 LB-IN
25-30 LB-IN
11-15 LB-IN
25-30 LB-IN
60
-
-
MIN. TENSION
0.28
0.28
0.30
2545
75
75
50
17
17
11
11
11-15 LB-IN
25-30 LB-IN
11-15 LB-IN
25-30 LB-IN
60
10
14-16
MAX. TENSION
4.9
7.1
8.1
12
8.1
12
7100
75
75
50
20
20
12-15
11
5.5
5.5
26
26
113
-
-
EN-11
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