43 02/02
ROUTINE MAINTENANCE
HOW TO USE A V-BELT TENSION GAUGE
CAUTION: Before doing maintenance
or tensioning on belt drives, turn equip-
ment off and lock out the power source.
Use guards on machinery when running.
1. Place a matched set of belts over the
sheave grooves. Take up the slack until
the belts appear fairly taut.
2. With the drive stopped, measure the
belt span length of your drive (see
table1.). Set the rubber O-ring on the
body of the tension gauge (S/N 29841-
093) at the dimension equal to 1/64 inch for
every inch of span length. For example, the
deflection for a 32 inch span is 1/64 inch x
32,1/2 inch.
3. Set the O-ring on the plunger at 0 against
the body of the tension gauge.
4. With the tension gauge perpendicular to
the span, apply a force to a belt in the
center of the span. Deflect the belt until
bottom of the large O-ring is even with
the top of the next belt, or the bottom of
a straightedge laid across the top of other
belt(s) on the drive. Release pressure
and read pounds of force used at O-ring
on plunger.
Note: When new belts are installed on a drive,
the tension will drop rapidly during the
first few hours. Thus, for new belts,
tighten to the initial installation deflection
force shown in the table 2. Check
tension frequently during the first 24
hours of operation. Subsequent
retensioning should fall between the
minimum and maximum forces shown in
the tables.
5. Compare the force required in step 4 with
the ranges in table 2. Tighten or loosen
belts to bring them into the recommened
range.
Note: The proper tension for V-belt drive is
the lowest tension at which the belts
won't slip under peak load conditions.
Note: All Belts can be found in the Parts Book
supplied with your machine
Note: A new belt for tension purposes is a belt
with zero running time.
Note: After a belt has been in operation for two
minutes it is considered used.
Note: The best set of matched belts will not
perform well if either the drive or driven
sheaves are worn out. These sheaves
should be inspected any time the belts are
replaced. If the sheaves show signs of
excessive wear they should be replaced so
that maximum belt life can be obtained.
CAUTION:Failure to follow these
guidelines could result in premature
belt failure, belt rollover, and P.T.O.
Bearing failure.
1.
2.
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