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Old Red (ME) 11-04-2012 17:14:03 67.255.66.109 Report to Moderator	Getting ready to install a new crankshaft pulley on my 8N engine. The engine is on an engine stand and the camshart cover and oil pan are removed so there is plenty of working room. It looks as if it's going to be a real tight fit. I probably can "pull" it on using a 5/8 NF bolt and spacers. My question is: would I gain anything by heating the pulley to ease the installation? And if so how much heat? The new pulley is a solid metal one (not sheet metal). Any suggesttions or ideas would be greatly appreciated. Thanks [Reply]   [No Email]
TheOldHokie 11-07-2012 04:59:54 108.8.1.116 Report to Moderator	Re: Crankshaft Pulley in reply to John Schmincke, 11-04-2012 17:14:03   John Smith8N said: (quoted from post at 00:11:53 11/07/12) Hobo,NC said: (quoted from post at 01:01:44 11/07/12) I prefer'em to go on tight... They were originally made to run a pump,,, not as a replacement for a original pulley... I think the intention was to have a tight fit,,, your 9N may have had a worn snout its not uncommon.... For those that want a plug and play look for a good used OEM pulley... Are buy tools made to pull this type of replacement on the shaft... I have posted a how to on this,,, this is what a wrench runs into regularly,,, its not someones fraught if stuff like this is a challenge for back yard Bob's...:roll: http://www.youtube.com/watch?v=Ex_yJ_V5UH8&feature=related I've got one of those handy dandy installation tools, but if the bore in the replacement pulley is actually .003" smaller than the crank snout like they're sayin', it ain't gonna pull it on there. It would go on half way and gall up, or it would crack the pulley snout. That's too much of a press fit. One big difference in the small block Chevy balancer old Boxwrench is installing and the N tractor pulley is the keyway. The small block Chevy balancer can start on the key before you start pulling it on. The N tractor pulley just has a little slot right at the end of the pulley snout and a short key inside at the timing gear. If you can eyeball that key, then pull that tight fitting pulley all the way on the crank and have it drop dead nutz onto the key when it gets there, you're dayum good. Especially with the timing cover on so you can't see how it's going. You'd have to be magical. No backyard Bob is gonna pull that off, and very few pros, either. Yep. Aligning the key on a fit that heavy is impossible. With .003 interference on a roughly 2" x 1.5" hub you are looking at something in excess of 4T press fit there is no way to move it once it's started. You also wouldn't need that 5/8" bolt snugged down to 150 lb-ft to keep it on :roll: The one I just skimmed measures 1.185. If my measurement is accurate according to Don's cranksahft specification that will still be a light press fit. TOH This post was edited by TheOldHokie at 11:18:43 11/07/12.   [Reply]  [No Email]
John Smith8N 11-06-2012 20:11:53 75.23.122.73 Report to Moderator	Re: Crankshaft Pulley in reply to John Schmincke, 11-04-2012 17:14:03   Quoting Removed, click Modern View to see I've got one of those handy dandy installation tools, but if the bore in the replacement pulley is actually .003" smaller than the crank snout like they're sayin', it ain't gonna pull it on there. It would go on half way and gall up, or it would crack the pulley snout. That's too much of a press fit. One big difference in the small block Chevy balancer old Boxwrench is installing and the N tractor pulley is the keyway. The small block Chevy balancer can start on the key before you start pulling it on. The N tractor pulley just has a little slot right at the end of the pulley snout and a short key inside at the timing gear. If you can eyeball that key, then pull that tight fitting pulley all the way on the crank and have it drop dead nutz onto the key when it gets there, you're dayum good. Especially with the timing cover on so you can't see how it's going. You'd have to be magical. No backyard Bob is gonna pull that off, and very few pros, either.   [Reply]  [No Email]
Hobo,NC 11-06-2012 16:01:44 71.30.78.35 Report to Moderator	Re: Crankshaft Pulley in reply to sHan tn, 11-04-2012 17:14:03   I prefer'em to go on tight... They were originally made to run a pump,,, not as a replacement for a original pulley... I think the intention was to have a tight fit,,, your 9N may have had a worn snout its not uncommon.... For those that want a plug and play look for a good used OEM pulley... Are buy tools made to pull this type of replacement on the shaft... I have posted a how to on this,,, this is what a wrench runs into regularly,,, its not someones fraught if stuff like this is a challenge for back yard Bob's...:roll: http://www.youtube.com/watch?v=Ex_yJ_V5UH8&feature=related This post was edited by Hobo,NC at 16:06:34 11/06/12.   [Reply]  [No Email]
TheOldHokie 11-06-2012 11:28:20 108.8.1.116 Report to Moderator	Re: Crankshaft Pulley in reply to old, 11-04-2012 17:14:03   Quoting Removed, click Modern View to see Turns out I had another one of the 192160 cram pulleys hiding on the shelf. I checked it and it measures 1.183/1.184 and is clearly 2-3 thousandths under the OEM pulley. TOH   [Reply]  [No Email]
TheOldHokie 11-06-2012 10:52:01 108.8.1.116 Report to Moderator	Re: Crankshaft Pulley in reply to John Schmincke, 11-04-2012 17:14:03   Quoting Removed, click Modern View to see I think you dropped a digit when you were typing. I assume you meant the prints said 1.1855/1.1865. I just measured an OEM pulley I took off my 51 8N with a caliper and as best I can tell it is 1.186/1.187. I have purchased several of the 192160 pulleys from you and I pulled the last one I have off the shelf last night to send to a custiomer. He damaged the first one I sent him when he tried to install because it was so tight. As best I can tell using my calipers this one measured 1.182/1.183. I chucked it up on the lathe and barely touched it with a boring bar and it now measures 1.185/1.186. FWIW I had to do the same on the 192160 I put on my 8N a few months ago. Many years earlier I installed one of your 192160 on my 9N with zero problems. That's all I know. TOH PS> The 192160's all have a label on the box that says "CRAM PULLEY" :roll:   [Reply]  [No Email]
carolina don 11-06-2012 11:19:55 70.60.100.86 Report to Moderator	Re: Crankshaft Pulley in reply to TheOldHokie, 11-06-2012 10:52:01   Yeah....I did drop a digit.Should read 1.1865/1.1855.I guess the reason it says cram,is because they have the wrong ID. don b   [Reply]  [No Email]
TOM N MS 11-04-2012 18:52:27 98.95.140.91 Report to Moderator	Re: Crankshaft Pulley in reply to Old Red (ME), 11-04-2012 17:14:03   The replacement pulleys are too small-- the sellers know it and don"t tell you--my Dad and I will always have shorter fingers because we had to sand and sand and rub and sand some more to get one of the defective pulleys installed on a weekend on his 2N.More Chinese junk--seller buys em cheap and sells em as if they are good replacement parts.   [Reply]  [No Email]
TheOldHokie 11-04-2012 17:48:58 108.8.1.116 Report to Moderator	Re: Crankshaft Pulley in reply to howdy1960, 11-04-2012 17:14:03   Quoting Removed, click Modern View to see The afternmarket pulleys are a bit tight - I just had a customer ruin his trying to "pull it off" after he "pulled it on". I suggest a light honing of the bore to open it up a few thou. Be careful - you don't want it sloppy. TOH   [Reply]  [No Email]
carolina don 11-06-2012 09:28:51 70.60.100.86 Report to Moderator	Re: Crankshaft Pulley in reply to TheOldHokie, 11-04-2012 17:48:58   Dan....according to my prints...the crankshaft should be 1.865 to an undersize of 1.855.I have attempted to measure the I.D.'s of the three pulleys that we sell with a set of calipers [not exact but close].The original type[2n6312]measures 1.192.The 192160 and 192152 measure about 1.187.I may be missing something,but see no reason why they won't fit the crank if it has been ground to specs or the pulleys are being made by diff vendors.What say you? don b   [Reply]  [No Email]