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Old 11-23-2010, 11:17 AM   #1
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1998 ZL440 LC crankshaft replacement

I'm a shade-tree auto mechanic by hobby, I have automotive type tools, ya know, wrenches, sockets, screwdrivers, torque wrench, et cetera, et cetera. I've tinkered with sleds before, clutches, chain case oil changes, stud installs but nothing as invasive as what is needed on my 1998 ZL440. The crankshaft has split on one side next to one of the rods and I need to replace it. The cylinders and pistons look intact and reuseable as well as the bearings and everything else. We shut it down as soon as the motor sounded funny. It would run with the broken crank but we towed it home and I took off the head and peeked in to find the crank was busted...

I don't really have a lot of money so I'm hoping I can find a use part(s) to get my sled back on the trails. Can I just buy a used crankshaft like the one in this ebay listing and replace it?:

Arctic cat Prowler 440 Pantera Crank - eBay (item 400171769724 end time Dec-09-10 09:23:38 PST)

I've gotten the cross referenced models that use the same crankshaft so I know that that one will work for me, but will I need to have the bearings and or races redone or anything else that I probably can't do in my garage? I have a torque wrench and will be getting a service manual soon but thought I would ask in here since you guys are the Cat Gods!


Last edited by acex008; 11-23-2010 at 11:25 AM.
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Old 11-23-2010, 11:24 AM   #2
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Sled: '99 ZL 600 EFI, '79 Yamaha Excel V
10-11 Mileage:
09-10 Mileage: 500 miles!!!
08-09 Mileage: too little (55)
I would have everything redone if its used IMO...just don't really know what you are getting. If not redone at least checked out.
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Old 11-23-2010, 11:27 AM   #3
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When you say, everything, what do you mean exactly? My father in law is a Cat dealer but he charges ridiculous $ for this kind of work, even for me! I could possibly have him look it over.
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Old 11-23-2010, 11:29 AM   #4
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Sled: '99 ZL 600 EFI, '79 Yamaha Excel V
10-11 Mileage:
09-10 Mileage: 500 miles!!!
08-09 Mileage: too little (55)
Every wear part, bearings mainly but just everything that comes in contact with other parts and just a main look of the whole main part for cracks and such. (although if it had a crack that would be a huge bummer for just buying it)
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Old 11-23-2010, 11:31 AM   #5
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I guess I should find something local so I can at least inspect it before buying it...

So let's say I do find a crankshaft, will I need special tools or calibration equipment to install it?
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Old 11-23-2010, 03:13 PM   #6
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I just replaced the crank in my triple and it was easy enough with the manual. I would suggest that you have someone check it out and balance the shaft especially after shipping it, one good bump and it can throw off the balance. If I were buying one that needed to be shipped I think I would look for one that came with the case.
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Old 11-23-2010, 08:37 PM   #7
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So I've found a lower end, case and shaft complete for $150 out of a '91 Jag and relatively locally. Ordered a service manual. I'll be posting my progress here.
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Old 11-23-2010, 09:19 PM   #8
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its well worth having it checked out before yo put it together. not just because of the bearings but a pro crank shop will check balance and timing. those cranks press together and they arent splined or keyed. on a twin they need to be 180 degrees from eachother. if the pto is off a little it can advance or retard timing on that cylinder causing shorter rod life. a couple hundred bucks now could save you a thousand later and keep you on the trail when the snow is here instead of in the garage.
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Old 11-24-2010, 05:17 AM   #9
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Thanks for the info jdtech. So who should I contact? A snowmobile repair shop or a specialty crank shop? I'll make some calls in the morning. Thanks again.
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Old 11-24-2010, 09:51 AM   #10
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The local dealer can do this inspection but I avoid them due to cost. I have a local snowmobile and atv salvage shop that I trust and deal with and the labor rate is cheaper, they deal with cranks. Maybe you can find something like that. I wouldn't expect too many suprises, this crank is for a zl440, not a zr 900.

You will need a snowmobile clutch puller and a flywheel puller (steering wheel puller will work) for unique tools.

A generic manual can be found here http://chadt.us/manuals/

Keep us posted and don't be afraid to ask questions
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Previous Sleds:
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1998 ZL 440
1998 zr 600 efi
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