Page 298
REPAIR INSTRUCTIONS, PART 1
Flywheel Housing Installation
[211 HD]
GENERAL INFORMATION
The current die-cast aluminum and ductile iron
flywheel housings for standard and automatic
transmissions can be identified by the two side
pads which contain six M16 x 2 holes and larger
diameter transmission mounting screw holes
(7/16 inch versus 10 mm). Flywheel housings
having the above changes replaced all previous
ASET™ flywheel housings (aluminum, ductile
iron, standard and automatic transmissions).
These current housings (Figure 336) are
manufactured to use standardized housing
mounting hardware as follows:
앫 Two upper external mounting location
capscrews — M3 (3 inches long)
앫 Six internal mounting location capscrews —
M (2 inches long)
앫 Eight washers used with aluminum or
current ductile iron housing — part No.
35AX1489
앫 Eight washers used with non-current ductile
iron housing — part No. 271AM5008
Old can be serviced with new; however, new
cannot be serviced with old.
Service replacement flywheel housings are the
standardized flywheel housing. The appropriate
mounting hardware comes with the new-style
flywheel housing supplied by the Mack Trucks
Parts System.
335
Figure 335 — Aluminum Flywheel Housing with
Four-Hole Side Pads (Non-Current Housing)
336
Figure 336 — Ductile Iron Flywheel Housing with
Internal Structure Ribs (Current Production)
Not Shown — Aluminum flywheel housing
(current production) has external structural ribs.
5-111.bk Page 298 Monday, July 10, 2006 2:26 PM
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