Front motor mount issue

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Dec 2, 2010 | 04:04 PM

R_W_B

Thread Starter

Road Captain

Joined: Oct 2010

Posts: 683

Likes: 3

From: Florida

Front motor mount issue

2007 Dyna Street Bob, 13890 miles.
Last week I set out to do the front mount washer shim and I noticed upon inspection my front isolator mount looked rather stretched and rough looking. So I ordered a new one from Zanottis'. Today I got it installed in place with the bolts in it, went to screw on the nuts and they started fine, but then noticed just as the bolts were coming out the other side of the nuts they started to drag some (both of them). So I stopped and inspected the bolts, they both looked fine. I inspected the nuts, they both look like someone hit the outside thread with a pin punch? I know I could get them on ok since they came off with no apparent damage to the bolts, but I am heading to the hardware store now to buy a couple of new ones after I post this.
What's bugging me, is this some sort of factory thing they do to keep them from coming all the way loose or something ? Anybody else notice this installing front mounts on Dyna? I am talking about the bolts and nuts that mount the top of the isolator mount to the engine brace, not the two bottom frame mount bolts.

Dec 2, 2010 | 04:22 PM

GPHDXLC

Grand HDF Member

Joined: Jun 2007

Posts: 4,598

Likes: 421

From: Lansing mi

I've had mine off and on 3 times with no problems like you are having. I'm assuming you had the motor jacked up so there was no pressure on the bolt, other then that I don't know why yours did that. When you do get the new mount on let us know if it helps.

Dec 2, 2010 | 05:08 PM

R_W_B

Thread Starter

Road Captain

Joined: Oct 2010

Posts: 683

Likes: 3

From: Florida

Quote:

Originally Posted by GPHDXLC

Thanks for the reply GPHDXLC,
Well you probably put yours back on with a rachet and did not notice. I always start everything by hand first.

Ok forturnately my friendly Ace Hardware man is smarter than me, (he is a retired NAPA guy). I showed him the nut and told him I wanted a new one. So he got one and gave it to me, I immediately tried it on a bolt and the new one did the same thing. I explained to him why I was buying the new one, he smiled and said what you have there are "all metal locking nuts". He said they are designed to self lock (kinda like a heavy duty version of the neophrene lockers if you will). He said the last couple of threads are stamped with an exacting measured stamp when they are made, to slightly flatten them, causing a slight drag. So I did not need new ones.
I might make half a mechanic yet in my old age.

Dec 2, 2010 | 05:20 PM

first dyna 07

Road Master

Joined: Jul 2007

Posts: 941

Likes: 0

From: New Jersey

Hey Man

Here is a tip just be very sure that you have the motor , supported separate from the frame . It will help you on the install Good Luck

Dec 2, 2010 | 06:16 PM

R_W_B

Thread Starter

Road Captain

Joined: Oct 2010

Posts: 683

Likes: 3

From: Florida

Quote:

Originally Posted by first dyna 07

Hey Man

Here is a tip just be very sure that you have the motor , supported separate from the frame . It will help you on the install Good Luck

Oh yes, I should have made that clear from the start. I definitely have the motor held up with a floor jack, I even put wood blocks also in case the floor jack settles like they sometimes do. I knew that from reading the washer shim thread and also the instructions that came with the HD oil cooler mount.
I noticed to get the mount bolts out and back in I had to literally grab the mount and pull it away from the frame pretty hard to get the bolt to clear the frame tube. They are too long to do it otherwise.
Thanks for the concern though, could have saved me some grief if I was dumb on that account also.

Dec 3, 2010 | 02:12 AM

dyna rider

Club Member

Joined: Dec 2007

Posts: 4,192

Likes: 168

From: Knoxville, Tn

Nuts

Those self locking nuts are not round. If you look at the nut from the side that the threads come out, you will see they are slightly oval shape. That's how they self lock.

Dec 3, 2010 | 07:36 AM

R_W_B

Thread Starter

Road Captain

Joined: Oct 2010

Posts: 683

Likes: 3

From: Florida

Quote:

Originally Posted by dyna rider

Those self locking nuts are not round. If you look at the nut from the side that the threads come out, you will see they are slightly oval shape. That's how they self lock.

Thanks, I did notice that they just look kinda funky. I'm learning as I go along. Only self lockers I had ever seen before were the neoprene ones.
It's great when you get one those real knowledgeable Ace guys. They can really educate me sometimes. Those part time school guys don't know that much but some of the older retired ones are "ace".
And of course you guys here on the forum are a tremedous help to me.