TM 9-2320-211-20
2-112. Drive Belts--Multifuel
a. Adjustment. Drive belt adjustment should be
made on new engines after the vehicle has traveled
100 miles. Check tbe drive belt tension by applying
a slight pressure individually to each belt at a point
midway between the fan and generator pulleys.
B e l t deflection at this point should be three-
quarters of an inch (fig. 2-129). If the belt
deflection is found to be otherwise, adjust the belt
tension as follows:
(1) Loosen the
generator-to-adjusting-arm
capscrew (fig. 2-127).
(2) Insert the end of the rim tool-and-wheel
nut wrench handle or a 30-inch bar, between the
crankcase and the generator. Make sure that the
lower end of the handle will bear against the crank-
case at a point directly below the front capscrew on
the valve tappet chamber front cover.
(3) Pull the upper end of the handle with a
pull of 50 pounds and, keeping the handle in this
position, tighten the generator-to-adjusting arm
cap screw. This procedure should place both belts
u n d e r the proper tension, and allow the belt
deflection specified above.
NOTE
Make sure that the lower end of the handle
will bear against the crankcase at a point
directly below the front cap screw on the
valve tappet chamber front cover.
(3) Pull the upper end of the handle away
from the engine with a pull of 50 pounds (fig. 2-
tighten the generator-to-adjusting arm screw (fig. 2-
b. Removal.
(1) Loosen the generator-to-adjusting arm
screw (fig. 2-127), and move the generator as far as
it will go toward the engine.
(2) Remove the front belt from the generator,
fan, and crankshaft pulleys, and lift the belt over
the fan.
(3) Remove the rear belt as described in (2)
above.
b. Removal.
c. Installation.
(1) Remove the capscrews, lockwasher, and
(1) Place the rear drive belt (fig. 2-127) over
s p e c i a l flanged washer securing the generator
the fan, and then over the crankshaft, fan, and
adjusting arm to the generator assembly.
generator pulleys.
(2) Push the generator assembly toward the
(2) Install the front drive belt as described in
engine, and remove the engine fan and generator
(1) above.
belts from the generator pulley and coolant pump
(3) Adjust the drivr belts as described in a
pulley.
above.
NOTE
Belts must always be replaced in pairs.
