Allis-Chalmers 400 Series - Mower Belt and Blade Replacement

Rotcay Mower
FIGURE 7
BELT REPLACEMENT
The mower drive belt can be replaced by the steps as
outlined in the section headed Attaching The Mower.
The arbor drive belt can be replaced by loosening the
hex nuts on the left and right hand arbor covers {3 on
each (X)ver) and lifting the covere off (Figure 6). Spring
the idler pulley over with a wrench and remove the old
belt Put the new belt around the pulleys as shown and
spring the idler pulley into place. Slip the arbor covers
back over the capscrews, making sure that the flat
washere and iockwashers are on the outside and tighten
the hex nuts down to secure the covers into place.
BLADE REPLACEMENT
DO NOT attempt to remove the blades unless you have
the correct size box or socket wrench to fit the blade
mounting capscrew.
To remove the blades, first remove mower from tractor
and turn it upside down as shown in Figure 7.
Then securely wedge a block of wood between the blade
and the housing in such position that it will hold the
blade safely while loosening or tightening the blade
mounting capscrew.
DO NOT attempt to remove the artor assemblies. Take
out blade mounting capscrews only.
Be sure to note the exact location of the large spring
washers, the shouldered spacer and the lockwasher under
head of capscrew and replace in exact same arrangement
when reinstalling blades.
A CAUTION: ALWAYS handle the blade with
care to avoid injury.
To sharpen blades yourself clamp blade securely in a
vise and use a large mill file along the original bevel.
File to a sharp edge.
To balance blade, place a small rod through center hole
to »e if blade rests with both ends balancing evenly.
File heavy side of blade until it balances out even.
NOTE: Your Allis-Chalmers Dealer is equipped to
sharpen and balance your mower blades. For expert
service and quality parts, see your authorized Allis-
Chalmere Dealer.
BEFORE the blades are reassembled, the arbor assembly
faces MUST be scraped clean of all accumulations of
dirt, grass or other foreign matter. This will insure a
positive "fit" of the blades to the arbor assembly faces
when the capscrews are tightened. The capscrews
should be tightened to 60 foot pounds of torque, or if a
torque wrench is not available, tighten securely with a
hand wrench.
NOTE: The blades must be mounted so that the
angled blade tips are on top or face the underside of the
mower housing.
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