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670T Crank Pulley
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smitty78 View Drop Down
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Joined: 26 Apr 2015
Location: Okla
Points: 91 		Post Options Post Options   Thanks (0) Thanks(0)   Quote smitty78 Quote  Post ReplyReply Direct Link To This Post Topic: 670T Crank Pulley
    Posted: 25 Apr 2018 at 8:16pm
L2 Gleaner with 670T - crank pulley shivs had slipped a bit so sent it to Dale mfg, beautiful repair and priced right.  A few hours later usage noticed the inner hub had cracked.  Wondered if I over torqued the bolt and the tapered shaft made it fail ?  Does anyone know the torque spec on the crank pulley bolt ?

thanks, smitty  
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MACK View Drop Down
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Joined: 17 Nov 2009
Points: 7664 		Post Options Post Options   Thanks (0) Thanks(0)   Quote MACK Quote  Post ReplyReply Direct Link To This Post Posted: 25 Apr 2018 at 9:29pm
220ft lbs.torque with all oil removed from both. Dry.    MACK
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Points: 91 		Post Options Post Options   Thanks (0) Thanks(0)   Quote smitty78 Quote  Post ReplyReply Direct Link To This Post Posted: 25 Apr 2018 at 9:43pm
So, the crank & hub tapered surfaces should be un lubricated during torque ?
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SteveM C/IL View Drop Down
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Joined: 12 Sep 2009
Location: Shelbyville IL
Points: 8246 		Post Options Post Options   Thanks (0) Thanks(0)   Quote SteveM C/IL Quote  Post ReplyReply Direct Link To This Post Posted: 25 Apr 2018 at 11:30pm
That's what Mack said.
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smitty78 View Drop Down
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Points: 91 		Post Options Post Options   Thanks (0) Thanks(0)   Quote smitty78 Quote  Post ReplyReply Direct Link To This Post Posted: 28 Apr 2018 at 6:10am
I was able to remove my 4 groove crank pulley without removing the radiator which was lucky but now having a hard time finding a replacement.  New over $1,500 (nearing value of entire combine, LOL), used $660, ouch.

New 3 groove around $500, but can you drive the alternator with just 1 belt and will it line up ?

Why don't those aftermarket monkeys offer a 4 groove ?  I'm not sure I've ever even seen a 3 groove setup, most are 4.  

Anybody have a 4 groove for sale ?

Notice the crack in the inner hub aligns with keyway and threaded hole ... perhaps a weak path


Thanks,

smitty







Edited by smitty78 - 28 Apr 2018 at 6:21am
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MACK View Drop Down
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Points: 7664 		Post Options Post Options   Thanks (0) Thanks(0)   Quote MACK Quote  Post ReplyReply Direct Link To This Post Posted: 28 Apr 2018 at 10:33pm
I may have one on a L2 motor. Will check.    MACK
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smitty78 View Drop Down
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Points: 91 		Post Options Post Options   Thanks (0) Thanks(0)   Quote smitty78 Quote  Post ReplyReply Direct Link To This Post Posted: 29 Apr 2018 at 9:38pm
duh ... answered my own question ... the 3 groove pulley is a tractor application with the single belt driving the AC compressor, likely was more field demand than the 4 groove in which 2 belts drive the hydraulic pump. I imagine 1 belt would drive the hydraulic pump but the shivs wouldn't match (AC belt is thinner than hyd belts) so I'll keep looking for a 4 groove. Almost bought an L2 for parts saturday at a sale, was hung on 1K for awhile but ended up at 3K per a good auctioneer.

Edited by smitty78 - 29 Apr 2018 at 9:43pm
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