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One of the most desired attachments for these tractors is a
front-end loader, but original ones are extremely hard to find.
Consequently, they are frequently discussed as a DIY project for the more
skilled hobbyists. However, these tractors required a fairly complex
subframe (see
Simplicity 515 Owner's Manual or
Allis-Chalmers L-12 Parts Manual) to "bridge" the stresses around the
vulnerable bevel gear box. The bevel gear box is cast steel, but it is
used to connect the front frame and rear frame rails and is held in by only 4
bolts. It can be over-stressed and cracked.
Here are some pictures of the factory's rear mounting bracket
for the subframe. It could be used on any hydrostatic or variable speed
Sovereign-class tractor (Allis-Chalmers B-112 or Simplicity 3012 or
later.) We've also included CAD drawings down below, for those interested
in replicating this factory mount.
Click any picture for a closer view
Kirk Waggoner (nickname thedaddycat) took
these photos of a factory rear mount while he was building additional
reinforcement plates for his Simplicity. Note that the mount goes
through a large round pre-existing hole in rear frame rail. A
separate story on building all the reinforcements that you see will be
coming soon...
Here are CAD drawings in two
different sizes, courtesy of Kirk's line drawings that Paul Kjorlie
(nickname PowrMaxPaul) developed.
Click here for an
847 x 1500 version that you
can save and print at 150 DPI.
