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Ford 9N, 2N & 8N Discussion Forum

Left or right hand threads?

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grumpyoldman

11-10-2005 16:38:26

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Is the bolt that holds the pulley on the crankshaft a left or right-hand thread? Having a terrible time getting it off and don"t want to chew it up. Thanks

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Denny (WI)

11-12-2005 02:39:11

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Re: Left or right hand threads? in reply to grumpyoldman, 11-10-2005 16:38:26

Bummer, I like the weld on a nut idea, but try to loosen it first with a chisel. May want to put some heat on her, in case someone put lock tight on the bolt. or grind off the head enough to release the tension from the bolt and remove the pully . Den

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grumpyoldman

11-11-2005 18:09:28

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Re: Left or right hand threads? in reply to grumpyoldman, 11-10-2005 16:38:26

I"ve ordered a 15/16" drag link socket (slotted socket for a 1/2 wrench). This fits the bolt and can be used with an impact wrench. We"ll see how it works once the socket arrives.

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Dell (WA)

11-11-2005 00:01:04

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right hand thread in reply to grumpyoldman, 11-10-2005 16:38:26

GOM..... .....yer 5/8-18 crankshaft pulley bolt is standard righty-tighty lefty-loosey thread torqued to an AMAZINGLY TIGHT 150ft/lbs.

BIG TIP: stuff some soft 1/4" rope down enny sparkie hole so the piston will stop the crankshaft from turning so you can loosen or tighten yer crankshaft bolt. OTHERWIZE yer crank will spin in the engine and you won't beable to remove yer crankshaft pulley bolt..... ....Dell

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grumpyoldman

11-10-2005 19:11:29

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Re: Left or right hand threads? in reply to grumpyoldman, 11-10-2005 16:38:26

OK, I'll try to explain what I've got. Its a '48 8N. The pulley at the front of the crankshaft is a machined 5" dia. v-belt pulley that sure looks like OEM. In the recessed center of the pulley sits a 3-3/8" dia disk with a splined hole in the center. The disk is bolted onto the pulley with four 1/4-28 hex head bolts. No doubt the disk drove a hydraulic pump shaft. All of this is fine. I can get the hydraulic shaft drive adapter disk off. The pulley though is held onto the crankshaft with a 3/4" dia. x 1/4" high round head. It is not a hex head. The face of the head is flat and has a slot. Picture a giant pan-head screw. I've got to get this damn pulley off, but have run out of tricks. I'm thinking of welding a nut to the face and using an impact wrench, but this is a last resort. Anybody got any ideas? As always, thanks.

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Vern-MI

11-11-2005 15:09:51

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Re: Left or right hand threads? in reply to grumpyoldman, 11-10-2005 19:11:29

How wide is the slot? Weld a piece of keystock that will fit the screw slot across the face of an old socket and use that to remove the screw. Or fit a piece of tool steel the width of the screw slot in a six point socket from corner to corner and try that as a big screwdriver on the end of your breaker bar. It sounds like the previous owner made a screw and probably had a custom driver to fit.

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TIMW(PA)

11-10-2005 16:41:38

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Re: Left or right hand threads? in reply to grumpyoldman, 11-10-2005 16:38:26

The big crown bolt on the front is regular right handed threads

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grumpyoldman

11-10-2005 16:53:42

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Re: Left or right hand threads? in reply to TIMW(PA), 11-10-2005 16:41:38

Thanks TIMW(PA). I don"t have a crown nut. My "48 8N has a flat head slotted bolt. I need to get this off but I"m running out of ideas as to how.

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Hobo,NC

11-10-2005 18:08:55

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Re: Left or right hand threads? in reply to grumpyoldman, 11-10-2005 16:53:42

Big cold chisel and a big hammer. A air chisel will break it. They make a socket to adjust tie rod ends but if it's tight you will break the special socket. Replace with a 5/8 X 1" find thread bolt. depends on the type pulley as weather you will need a washer also. If you use a OEM crank bolt it werks on one of the aftermarket pulleys that has the 4, 1/4" threaded bolts BUT YOU WILL NEED TO COUNTER BOAR THE CENTER HOLE SUM. The original crown head bolt with the slots fer the hand crank has a bevel that protrudes on it were the hex part of the bolt and the threaded stud meets so iffin you do not take a drill bit and counter bore it sum it may werk loose. The utter type you have'ta use the 5/8 bolt with a washer that will need to be ground down to fit inside the counter bore of the pulley, that�s why the OEM crank bolt will not werk cuzz the hex izz bigger than the counter bore. This type pulley has 4 rubber bush�ins in it and may have 4- 3/8 bolt holes.. I have not seen the slotted crank bolt screw used with the stock pulley and don�t think it could even be used On the OEM pulley. So ya got a replacement pulley most likely used to run a front loader pump set up. The aftermarket pulley fer the loader pump set up izz a good pulley and better than the OEM stamped steel type, the aftermarket pulley izz a buillit steel type

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Dan

11-10-2005 17:05:53

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Re: Left or right hand threads? in reply to grumpyoldman, 11-10-2005 16:53:42

More than likely - it was replaced for a front mounted hydraulic pump at some point. What is it that is giving you problems? Bolt head rounded? Crank shaft keeps spinning? Getting a grip on the bolt?

Dan

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TIMW(PA)

11-10-2005 17:00:48

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Re: Left or right hand threads? in reply to grumpyoldman, 11-10-2005 16:53:42

I have a 2N so I couldnt tell you for sure but i imagine it is the same. Can you get a socket on it? I dont quite understand what a slotted bolt is unless someone cut a slot in with a hacksaw or something

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mhb@ufe

11-10-2005 17:55:23

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Re: Left or right hand threads? in reply to TIMW(PA), 11-10-2005 17:00:48

If you use a hammer and punch to start the bolt by hitting in the outside edge of the slot they will usually start so you can turn them out with a large screwdriver

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