Cub Cadet I-Beam Style - Manual (Page 146)

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OVERVIEW OF “1995” SNOW THROWER CHANGES
1. Failure of the 735-0243 friction wheel rubber. Failure of the rubber ring is directly related to improper
adjustment of the wheel drive cable. Ideally we are looking for the cable to be set so there is around 1"-1-
1/2" of deflection when the cable is set and the clutch lever is not engaged. We have seen many instances
where the cable is so tight you can strum a tune on it. This causes severe cracking and chunking of the
rubber. As the clutch lever is depressed it tilts the aluminum drive plate 656-0009 back into the friction
wheel. Since the wheel has no place to go, the rubber ring is squashed out and deformed. Under all this
added stress the rotating aluminum drive plate causes the cracking and chunking takes place.
2. Failure of either left or right auger assemblies on 26-30" units. What we saw here was the actual flytes sep-
arating from the spokes. It appears that the welds would pop off under severe loads. In many cases the
bead of weld would not be sufficient. Welding staff were notified and advised that the bead of weld must be
full length as per the print.
3. Failure of the 725-1645 halogen bulb. Up until 1995 this bulb was used. We would see failures where the
filament inside the bulb appeared to have broken. We would also see failures where the bulb had definitely
blown. The resulting arc was caused by Snow King engines that were creating voltage spikes often
approaching 50 volts. The alternators were spec’d out at 12.8 volts. This phenomenon was very difficult to
catch but with the correct type of voltage tester you could capture this. Tecumseh has acknowledged this
problem. what we have done is changed the filament within the halogen bulb. It is now much heavier and
better able to resist voltage spikes. The part number is 725-1658.
4. Failure of the 731-1313 cable guide. This part is used exclusively on units equipped with the remote tilt
chute feature. We were seeing many of these guides failing where they were secured with the 710-0776A
screw. The cable guide would under certain situations become frozen or extremely stiff to operate in the
very cold weather. When the lever on the control panel was pushed forward or pulled backwards the guide
would simply crack at the mounting area.
OVERVIEW OF “1996” SNOW THROWER CHANGES
General
In order to transfer more of the available power to the ground, changes were made to the major compo-
nents of the drive train for both track and wheel drive units. While the individual components may not
appear to be much different, the combined effect of these changes provides the desired results. The inven-
tory of some of the components is a major factor on the implementation of the following changes for 1996.
1. A new friction disc assembly 656-0012 replaces 656-0009. It is larger in diameter and is not compatible
with previous hexagon shafts. The new hexagon shaft 717-1444 has only 7 teeth and the roll pin location
which limits the travel of the friction wheel assembly has been changed to take advantage of the new
larger diameter drive disc. The new hex shaft now mates up with an 80 tooth gear 717-1445 instead of the
previous 79 tooth gear 717-1288. These changes significantly improve the gear reduction of the transmis-
sion.
2. Shear bolt 710-0890A replaces 710-0890. Its stress has been decreased approximately 17% by cutting
the groove deeper. This will provide greater protection to the worn drive assemblies.
3. Friction wheel assembly 684-0042A replaces 684-0042. The new assembly is wedged together instead of
being held together by a snap ring.
SNOW THROWER.fm Page 7 Wednesday, February 20, 2002 10:28 AM