Engine Adjustments; Adjusting The Drive Belt - Westerbeke 3.5 SBCG Operator's Manual

ENGINE ADJUSTMENTS
GENERATOR DRIVE BELT
(ADJUSTING)
Generator models built prior to April 2015 ( OC date code
and older).
The generator's drive belt is located under the
engine. To access the belt for inspection and/or adjustment,
remove the cover as shown. Follow the recommended
inspection/adjustment periods found in the Maintenance
Schedule of this manual. The proper belt tension can be
checked by -carefully measuring the spring length.
COVER
1-1/Sin {28.57mm}
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~~~
IT IS NORMAL FOR SOME BELT
DUST TO ACCUMULATE IN THE
ENGINE PAN, SIMPLY WIPE CLEAN
GENERATOR DRIVE BELT
(ADJUSTING)
Generator models built after April2015 on {OD date code
and newer). The generator's drive belt is located under
the engine and is accessed by removing the cover as
shown in the illustration above. Drive belt tension is
adjusted at the factory with a spring length of 1 inch (1.00").
It is important that the spring length be re-adjusted at the 50
hour break-in period to 1 1/8"- 1 1132" (1.125"- 1.063").
this re-adjustment at the 50 hour break-in is very important
with regards to drive belt service life. Failure to perform the
re-adjustment can result in premature drive belt failure .and
possible warranty denial on belt replacement. Reference
Service Bulletin #276 dated May 6, 2015. Follow the
recommended inspection/adjustment periods found in the
Maintenance Schedule of this manual.
BELT ASSEMBLY (vtewed from underneath)
The Idler Arm/Spring should not BOUNCE more than
118-3/16 of an inch during normal, steady state operation.
Excessive Idler bounce can be caused· by insufficient drive
belt tension. Operating with an insufficient drive belt
tension and Idler bounce can result in premature drive belt
wear and resulting failure. This applies to both older and
current models.
BELT INITIAL INSTALLATION
"'ADD SPACER
~N.56105
1.1251NCH to 1.063 INCH
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= ! '
I
MAINTAIN THIS SPRING TENSION
Engines & Generators
21