Product Manual

Installation / Initial Set-Up

The shaft speed of the generator must run between 3540-3780 RPM. At no

load, the correct speed is 3780 RPM.

 If the engine is a 3600 RPM engine, then a sheave diameter ratio of 1:1

should be used. This means that the diameter of the sheave on the engine

is the same as the diameter of the sheave on the generator.

 If the engine is rated at a speed less than 3600 RPM, you will need to use

a larger sheave on the engine, using the following formula:

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.

Engine Speed (RPM)

Generator Sheave Diameter

3600 RPM

Engine Sheave Diameter