TM 55-1905-223-24-8
(4) Compare this deflection force with the ranges of forces given in Table 2-3.
(a) If the deflection force is less than the minimum, the belt should be tightened.
(b) If the deflection force is more than the maximum, the belt should be loosened.
(c) New belts should be checked frequently until their deflection stabilizes.
Table 2-3. Recommended Deflection Forces
Small Pulley
Recommended
Diameter
Deflection Force, Lbs.
Range
Minimum
Maximum
3.0" - 3.2"
2.3
3.2
3.4" - 3.6"
2.5
3.6
3.8" - 4.2"
2.9
4.2
4.6" - 7.0"
3.5
5.1
4.6"
4.0
5.9
5.0" - 5.4"
4.5
6.7
5.6" - 6.4"
5.0
7.4
6.8" - 9-4"
5.8
8.6
7.0"
7.1
10
7.5" - 8.0"
7.9
11
8.5" - 10.0"
9.3
13
10.5" - 16.0"
11
16
_________
a. Tag and disconnect external electrical wiring to air compressor assembly motor (4).
b. Disconnect, air outlet line (5) and unloader air line connection (5).
c. Remove four bolts (1) from frame (3) and mounting bracket (2).
_____________
a. Set replacement air compressor assembly (4) in place.
b. Install four bolts (1) through mounting bracket (2) to frame (3).
c. Connect onloader air line connection (6) and air outlet line (5).
d. Connect electrical wiring to proper terminals on air compressor assembly motor (4).
2-13