0
, . Drive Colts
--...-
OM 2012
B. -Chick BeIt Tcnsicn
Check belt tension every ZOO hours, or bi-week!y.
A l~eit whIvh is too !ight is
destructive to t-he bearings of the driven pert.
A locsc beit will slip and cause
inefficient operation of the part being driven.
Belts may be checked with a belt tension gage, Detr0i.t DieseI No. Bi-33-73FA,
or equivulen:. (See Fig. 12 for tension values.) Check at midpoint between
puf Icys.
- .
7
Fan Drive Aiternatcc . Drive
50-60
50-70
,
Belt Tension Chart (lbs.,&eit)
Figure 12
Belt tension may also be checked by a firm push with the thumb, at a point mid-
way between two put leys.
A properly adjusted belt should be depressed l/2 to
3/4 inch.
C. Belt Adiustment
(1) Alternator belt
Mjustalternatcr drive belt as follows: (See Fig. 13)
.(a) Loosen pivot screw ond nut (3).
(b) Loosen adjusting bracket screw (1) and use a long screwdriver (or pry
bar) to pry the alternatcr’(4) outward to increase belt tension.
CAUTION:
EXERCISE CARE TO PREVENT DAMAGE TO ANY
COMPONENT.
Aug 25’85
2-l
Page 13
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