Generac Power Systems 04758-2 ユーザーズマニュアル

If this procedure or equipment are not available,
locate the nearest Generac Guardian Dealer and they
can perform the adjustments.

NOTE:

A service fee may be charged for this adjustment.

If both AC frequency and voltage are correspondingly
high or low, adjust the engine governor as follows:

1. Loosen the governor clamp bolt (Figures 2.3 and

2.4).

2. Hold the governor lever at its wide open throttle

position, and rotate the governor shaft clockwise
as far as it will go. Then, tighten the governor
lever clamp bolt to 70 inch-pounds (8 N-m).

3. Start the generator; let it stabilize and warm up

at no-load.

4. Connect a frequency meter across the generators

AC output leads.

5. Turn the speed adjust nut to obtain a frequency

reading of 63 Hz.

6. When frequency is correct at no load, check the

AC voltage reading. If voltage is incorrect, the volt-
age regulator may require adjustment.

1. Loosen governor clamp bolt (See Figure 2.4).

2. Completely remove the idle spring.
3. With governor arm at wide open throttle position,

rotate governor shaft fully clockwise. Tighten
clamp bolt to 84 inch-pounds.

4. Start unit and apply full load. Use full load speed

adjust screw (Figure 2.5) to adjust frequency to
58 Hz.

5. Remove load, stop engine, loosen the idle adjust

screw and reconnect the idle spring.

6. Using a hand, push the governor arm to the

closed throttle position. Make sure the idle spring
does not stretch at all.

7. Restart the unit.
8. Slowly turn the idle adjust screw to adjust the no-

load idle frequency to 63-63.5 Hz.

9. The governor is now set.

◆

GOVERNOR

SHAFT

ADJUST

SCREW

GOVERNOR

CLAMP

BOLT

◆

Generac® Power Systems, Inc.

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