Alternator pulley nut
Thread Starter
|
Freshman User
Joined: Jul 2003
Posts: 26
Likes: 0
Alternator pulley nut
Maybe my question is getting lost at the end of an different thread, so I'll start a new one.
How do you tighten the alternator pulley retaining nut with out the alternator spinning? How tight should the nut be?
I just replaced the alternator on my 2000 4.0L with a re-manufactured one from the ford dealer. I had to transfer the pulley from the old one to the replacement. The pulley nut on the old one was extremely tight and difficult to remove. I broke a strap wrench trying to keep the alternator from spinning. Ended up jamming a screwdriver in through the vent holes to remove the nut. I'm not comfortable using this method to install it on the replacement unit. What's the normal method?
How do you tighten the alternator pulley retaining nut with out the alternator spinning? How tight should the nut be?
I just replaced the alternator on my 2000 4.0L with a re-manufactured one from the ford dealer. I had to transfer the pulley from the old one to the replacement. The pulley nut on the old one was extremely tight and difficult to remove. I broke a strap wrench trying to keep the alternator from spinning. Ended up jamming a screwdriver in through the vent holes to remove the nut. I'm not comfortable using this method to install it on the replacement unit. What's the normal method?
Post Fiend
Joined: Jan 2003
Posts: 9,748
Likes: 16
From: Connecticut
If you can come close to breaking another strap-wrench tightening the nut, then I have to think that'll do. 
FWIW, I poked around my Ford manuals and didn't find any torque specs for the alternator pulley nut. Which in my book means "tighten it as much as you can". If you need more peace of mind, use some Loctite.
FWIW, I poked around my Ford manuals and didn't find any torque specs for the alternator pulley nut. Which in my book means "tighten it as much as you can". If you need more peace of mind, use some Loctite.
Elder User
Joined: Aug 2006
Posts: 761
Likes: 0
From: Southeast MI
I haven't done this yet but...
An impact gun would be nice but a large breaker bar (cheap @ harbor freight) and an appropriate puller should be called for & watch for woodruff keys coming out. O yeah, with a breaker bar, you'll probably need a heavy bench vice too. Your situation may vary, but I hope this helps.
Thread Starter
|
Freshman User
Joined: Jul 2003
Posts: 26
Likes: 0
Unfortunately, there's no key or spline on the shaft for the pulley. When I hold the pulley with a strap wrench and tighten the nut, the shaft spins inside the pulley with only maybe 5 ft/lbs of torque. (Maybe I should try grinding a slot in the shaft and pulley w/ a dremel, and sticking something in as a key?)
95 ft/lbs sounds about right, at least based on what it took to get it off the old alt. I ended up having to jam a screwdriver into it, then remounting the alt onto the engine so I could get some leverage.
Loctite between the shaft and pulley, may help me tighten it some more, but I'd be surprised if it would hold up to 95 ft/lbs.
95 ft/lbs sounds about right, at least based on what it took to get it off the old alt. I ended up having to jam a screwdriver into it, then remounting the alt onto the engine so I could get some leverage.
Loctite between the shaft and pulley, may help me tighten it some more, but I'd be surprised if it would hold up to 95 ft/lbs.
Elder User
Joined: Aug 2006
Posts: 761
Likes: 0
From: Southeast MI
Hey Drummer, that scares me a bit. The key would probably have to come back out after install so it doesn't come out in use at bullet speeds. Well it would probably sort of rattle out & drop but unpredictable anyway. Normal key ways are fairly precision machined perhaps with a surface grinder for a case like this. Well besides that, it would take some pretty stubborn grit to do it. I'll get my head back in Googling after I get some work done today. Must be a special tool for some Fords.
Post Fiend
Joined: Jan 2003
Posts: 9,748
Likes: 16
From: Connecticut
Dremelling a slot into the shaft head sounds like a pretty good idea to me. Then use a large screwdriver or something similar to hold the shaft.
Trending Topics
Elder User
Joined: Feb 2004
Posts: 811
Likes: 0
Use an impact and hit it hard, it won't come loose if you use the impact. If you modify the alternator you may well loose any warranty with it.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
10 Most Surprising 2026 Ford Truck Features!
Joe Kucinski
Senior User
Joined: Oct 2006
Posts: 367
Likes: 0
on my LT1 the end of the shaft has an allen key in it. I used a big 1/2" deep well socket (they have offset wrenches for this) to tighten the nut. I ground some flat edges on the cheap socket to allow a wrench to hold it. I slipped a long t-handle allen in the socket, then tightened the hell out of the nut. Im not sure it if was 95 ft lbs but it was a lot 
Thread
Thread Starter
Forum
Replies
Last Post
Lee Binder
Aerostar
6
Jun 26, 2020 04:05 PM
zoom38
1987 - 1996 F150 & Larger F-Series Trucks
39
Mar 30, 2018 01:53 PM
black & blue 78/9
1973 - 1979 F-100 & Larger F-Series Trucks
6
Nov 5, 2016 01:39 PM
jaberwocky
1997 - 2003 F150
2
Aug 28, 2009 05:49 PM
