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	91 indy chain case leaks - case leaks started by mpilihp
	January 21st 2008 at 11:36 AM Post #1
	mpilihp Starting Member 11 Posts Group: Members Member Since: January 6th 2008 Location:
	Hi the lower bearing went and also broke the chain on my 91 Indy trail. I took the chain case off and had the shop replace the bearing, they said this year did not take a seal on the back side of the bearing. I put the case back on, installed the chain, put a new seal on the cover and proceeded to put oil in to the bottom fill hole. Most likely it leaked before I took it off... It leaked oil slowly out somewhere from the bottom where I cant see. Im assuming the cover isnt sealing well but I guess it could also be leaking pask the bearing too. THe drive shaft is cogged and the bearing is round so its got holes all around it so why wouldnt it leak. Im mechanically inclined, but havent worked on sleds much so dont know how this should be. Ive read some threads that have said not to worry if there isnt any oil in the chain case, just to add some heavy gear oil occasionally to keep it wet as its similiar to a motocycle chain which is just kept greased and is fine. Any help will be very much appreciated. THanks ~ Phil Rating: 0 Quick Edit Edit Topic
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	January 21st 2008 at 12:34 PM Post #2
	Indy_500_Classic Young Ripper 279 Posts Group: Members Member Since: October 21st 2007 Location: Barrie, ON, Canada Current Sled: '91 Indy 500 Classic Miles Last Season: 497.3 Miles This Season: 0.0
	If your chaincase leaks, you could get oil on your rotor, affecting brake performance. There should be an oil wiper behind the bearing. It's green around the outside, and black in the centre. What I'm talking about is item 79 in this diagram. Click this link for all part breakdowns -> http://parts.polarisind.com/Browse/Browse.asp 1991 Polaris Indy 500 Classic Rating: 0 Quick Edit Full Edit
	January 21st 2008 at 1:02 PM  [ Modified January 21st 2008 at 1:05 PM ] Post #3
	ACEXLT THREE FOR ALL 5293 Posts Group: Members Member Since: September 17th 2002 Location: Greenfield, WI, USA Current Sled: '01 XCR 800 Miles Last Season: 750 Miles This Season: 1326
	There were 2 chaincases that year depending on your serial number. One of them is the one pictured above, but it sounds like you have the other one which does not have seals. It has 1 o-ring. That o-ring should have been replaced. #22 in pic. '01 XCR 800 '00 Indy Triumph TRIPLES RULE!! Rating: 0 Quick Edit Full Edit
	January 21st 2008 at 2:11 PM  [ Modified January 21st 2008 at 2:22 PM ] Post #4
	mpilihp Starting Member 11 Posts Group: Members Member Since: January 6th 2008 Location:
	Hi Guys thanks, the sled shop looked it up and said there wasnt a seal of any kind behind the bearing. I cant see your pic ACEXLT but the first diagram Tyler posted looks like my case. How can I tell what case I have?? When I took the case off there wasnt anything behind the bearing, would it have gotten chewed and spit off the shaft? Looking at the parts blowup your link sends me to that looks like my chaincase. Thanks HI Again, more browsing on the Polaris parts site and I see the second diagram for the chain case, looks exactly the same. THe part you mention ACEXLT #22 is on the upper shaft. THe case is leaking without the track turning, just sitting still and oil leaks out from the bottom so I dont think its coming from there though I wonder if they put the oring in...... Rating: 0 Quick Edit Full Edit