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Guide to Maintenance (continued)
BELT DEFLECTION FORCE
MODEL
H.P.
R15 GAS
13, 14
R15 DIESEL
9.1, 9.3
R30 GAS
20.5
R30 GAS
22.5
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.
If belts are too tight, overload will be put on motor and motor bearings.
R-Series Engine
Operation & Service
PSI
RPM
MOTOR
PULLEY
O.D.
175
1025
4.95
175
870
4.35
175
765
4.35
175
940
5.75
BELT
BELT
QTY
SECTION
NUMBER
OF
BELTS
BX
71
2
BX
71
2
B
80
2
B
81
2
25
USED BELT
NEW BELT
DEFLECTION
DEFLECTION
FORCE
FORCE
(lbs. min)
(lbs. max)
3.6
5.2
3.9
5.6
5.0
7.1
5.0
7.3
CQF3474 v.00
Jan.2018
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