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C-Blower Belt Adjustment
Maximum life and wear can be obtained from belts only if
proper pulley alignment and belt tension are maintained.
Tension new belts after a 24-48 hour period of operation.
This will allow belt to stretch and seat grooves. Make sure
blower and motor pulley are aligned as shown in figure 8.
1 - Loosen four bolts securing motor base to mounting
frame. See figure 7.
2 - To increase belt tension -
Slide blower motor downward to tighten the belt. This
increases the distance between the blower motor and
the blower housing.
3 - To loosen belt tension -
Slide blower motor upward to loosen the belt. This
decreases the distance between the blower motor
and the blower housing.
4 - Tighten four bolts securing motor base to the
mounting frame.
PULLEY ALIGNMENT - NO TENSIONER
MOTOR
PULLEY
NOT ALIGNED
FIGURE 8
Drive No.
Browning
Z01
1VP34 X 7/8
Z02
1VP34 X 7/8
Z03
1VP34 X 7/8
Z04
1VP34 X 7/8
Z05
1VP44 X 7/8
Z06
1VP50 X 7/8
ZAA02
1VP40 X 7/8
ZAA03
1VP40 X 7/8
ZAA04
1VP44 X 7/8
ALIGNED
BLOWER
BELT
PULLEY
Motor Pulley
OEM
31K6901
31K6901
31K6901
31K6901
53J1501
79J03
79J03
P-8-1488
D-Check Belt Tension
Overtensioning belts shortens belt and bearing life. Check
belt tension as follows:
1 - Measure span length X. See figure 9.
DEFLECTION 1/64" PER INCH OF SPAN
OR 1.5mm PER 100mm OF SPAN
2 - Apply perpendicular force to center of span (X) with
enough pressure to deflect belt 1/64" for every inch
of span length or 1.5mm per 100mm of span length.
3 - Example: Deflection distance of a 40" span would
be 40/64" or 5/8".
4 - Example: Deflection distance of a 400mm span
would be 6mm.
5 - Measure belt deflection force. For a used belt, the
deflection force should be 5 lbs. (35kPa). A new belt
deflection force should be 7 lbs. (48kPa).
A force below these values indicates an underten-
sioned belt. A force above these values indicates an
overtensioned belt.
F-Field-Furnished Blower Drives
See blower data tables for field-furnished blower drives to
determine BHP and RPM required. See table 6 for drive
component manufacturers numbers.
TABLE 6
DRIVE COMPONENT PART NUMBERS
Blower Pulley
Browning
AK54 X 5/8
AK46 X 5/8
AK41 X 5/8
AK39 X 5/8
AK49 X 5/8
AK51 X 5/8
BK80H
AK59 X 1
AK59 X 1
Page 31
MEASURE BELT TENSION
FORCE
FIGURE 9
OEM
Browning
A40
A39
A39
A38
A41
A42
100788-03
A53
31K68
A50
31K68
AX51
Belts
OEM
100245-40
100245-29
13H01
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