Northern Industrial Tools 10000 BDG - Manual (Page 21)

Installation / Initial Set-Up
21
If smaller than recommended sheaves are used, the life of the belt(s) will be
shortened and the possibility of belt slippage increases.
Note about direct coupling:
We recommend you use belts & sheaves to transmit power from the engine to
the generator. If you instead choose to direct couple, you must align the
generator shaft and engine shaft exactly to within the specified tolerances of
the chosen coupler. You will need to adjust the relative position of the
generator and engine until both their shafts are directly aligned in all planes.
2. Adjust belt(s) to get proper tension.
Proper belt tension is required to transmit full power from the engine to the
generator at the rated speed. Belts that are too loose will slip. Belts that are
too tight can bind and cause engine or generator damage.
WARNING:
Belt slippage can cause static electricity build-up, which may result in
sparking. Fire ignition can result.
Step 1. Measure L – the center-to-
center distance between the
two sheaves.
Step 2. Measure d – the deflection
of the belt
Step 3. Tighten or loosen belt until:
d = 0.016 x L
If a belt tensioner is used, it should
be installed on the slack run of the
belt.
Acquire &
install guard Install a guard over the entire power transmission assembly.
The customer is responsible for acquiring or fabricating an appropriate guard that
meets all the requirements described in this section.
Note: A guard has not been supplied with the generator because the
manufacturer does not know the size and dimensions of the engine to be
used, nor in what configuration the customer will choose to mount the
generator & engine.
Engine Speed (RPM) = Generator Sheave Diameter
3600 RPM Engine Sheave Diameter