(3) Verify that the dimensions of the hole on the belt wheel and keyway shaft match or
correspond with each other. Also make sure that the bolt of the engine shaft is
tightened to the proper torque specifications.
(4) When the engine is matched with other belt driven machines, the total desired belt
distance traveled by the driven wheel must equal the total distance traveled by the
driver wheel. If this is not properly calculated and matched, the desired speed on the
driven wheel will be incorrect. A formula used to calculate the necessary diameters of
the various wheels is provided below.
The diameter of driving wheel (belt wheel) can be calculates as follows:
Diameter of engine driving wheel (engine pulley) =
Diameter of driven machine x speed of driven machine
Diesel speed (engine speed)
(5) Make sure that the belt has a correct tension to it.
Note: If the belt is to tight, the engine bearings will wear at a high rate leading to engine failure.
If the belt is to loose, the belt will slip at high speeds and high loads causing high pitch whistling
noises.
1-2.1 Allowed clearance between belt wheel and engine
The belt pulley wheel should be as close to the engine as possible. The values of L are tabulated
in table 1-1.
Table 1-1. Allowed belt pulley wheel to engine distances.
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