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Discussion Starter · #1 ·
Just wondering how to change center to center distance on the firecat chassis. My service manual shows how to measure but doesnt show how to change. I have yet to measure but feel the distance is larger than spec. If I run the 034 belt it needs to sit flush or even a bit down on the secondary or I get belt squeal. I am running an ultimax xs belt now and they want the cord line on the belt to be flush with top of secondary. If I do that the belt is like a guitar string. Any ideas??
 

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this is a tail end of a post of mine from hardcoresledder. Its easier to take off both your clutches and put the bolts back in and try to get them as inline or square as posible.

Then you loosen up your Pto bracket bolts and follow the rest (its from a eariler post I did from a coolant up grade on hardcoresledder).

I left my 3 bolts the hold the pto bracket to the frame alittle loose and then adjusted my center to center on my clutches, the adjustment for this is on the bottom side of your pto bracket plate, it looks like a little rubber stopper. The measurement your looking for is 12.2 inches or 12 1/6 inches.

After you get that set make sure you remeasure after the Pto plate is tightened. Then reinstall clutches and get your clutch alignment. Torque the clutches down to specs (55lbs on the primary).

After its all done, give a once over make sure you didn't forget anything, and run the sled for a bit and then come back check the Center to center and re-torque your primary and you should be set!!!

Well hope this helps if anyone has something to add go ahead. Some of the no-brainers I left out.
 

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im haveing the same problem as you. when i set my belt deflection so my belt rides about the secondary it sqeels like hell. how do i fix this? and is this costing me top speed? my belt does feel pretty tight too.
 

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Discussion Starter · #5 ·
My center to center distance is too far for sure. Not by much but probaly around 1/8-3/16" of an inch. I will try and check what was mentioned above behind the pto plate and see what I find.
 

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Your belt is only a certain length to begin with, by making your primary and your secondary further apart from each other, you will need a longer belt in order to have the belt riding in your secondarys sweet spot (1/8 or so above the sheaves in the secondary). If you clutches are closer together in theory you'd need a shorter belt for your belt to ride in the sweet spot in the secondary. I hope this helps, its the easiest way I could explain it.
 

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Discussion Starter · #8 ·
The problem were having is that the stock belt should be able to ride 1/16 or 1/8 inch above the secondary shims but if its set that way its way too tight meaning the center to center distance is too far and would need to be corrected. My sled is an o5 and does not have the snubber you were talking about. It has a snubber on the exhaust side but this wont do anything. diamond drive firecats need a center distance of 11 inches. Just trying to figure out how to adjust it.................so if anyone has some info please let me know. Thanks
 

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If you are getting belt squeal at idle on a 2005 model you need the update on the driven clutch. the update gets rid of the plastic thing with the shims that you use to seperate the sheves to change the belt. it replaces it with a new bolt, bushing and washer. it cures the problem [free of charge] but makes changing the belt a bastard job with that function no longer there. hope this helps you!! jim
 

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Sorry cant help on the how, but belts do vary in length from time to time and especialy from a different manufacture. Get the offset C to C tool and adjust to specs. Dont use the belt as a guide. JMO.
 

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I am having the same problem with the identical sled. It started after I had the upgrade work done.

I dont have the tool, but will probably have to go get one.

How does the offset and parellelism come out for you? Reading the Service Manual it seems that they are all very closely related.
 
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