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4-3 BELT ADJUSTMENT
Belt tensions should be checked every 40 hours to
get maximum life from drive belts and best perfor-
mance from the cutter. Belt tension is adjusted by
increasing or decreasing the length of the spring on
the moveable idler. For proper belt tension on the
mower, the spring lengths should be set at 2-7/8”.
(Figure 4-1 C) To adjust the spring length, loosen or
tighten the 3/8” hex nuts on the spring adjustment rod
until the correct spring length is reached.
Figure 4-1C 1/2” Hex Nuts - Spring Length Adjustment
4-4 BELT REPLACEMENT
Use only genuine Bush Hog replacement parts.
A. Remove right and left side shields.
B. Relieve spring tension by loosening the two
1/2” hex nuts on the spring adjustment rod. (Figure 4-1 C)
C. Remove old belt.
D. Install new belt as shown below. (Also refer to
the decal on underside of belt shield) Be sure that
the belt is properly positioned in all sheave grooves.
E. Adjust tension on the belt by adjusting the
length of the spring on the moveable idler. The cor-
rect spring length is 2-7/8”.
F. Replace all shields before operating machine.
12
7. Spindle Assembly - Apply 3 shots of multi-
purpose grease with grease gun every 40 hours.
Grease fittings for spindles are
accessible through holes in the
shields.
(7) 40 Hours
2-7/8"
EFM 480
FRONT