|
|
Post by vtwinton on Aug 27, 2007 19:23:02 GMT -5
i'm starting to take apart my sr500. i'm going to send the frame, swing arm etc. out to be powder coated. problem is i took the nut off the end of the swingarm axle but the axle wont budge. i tapped it with a hammer but it doesn't move. i didn't hit it too hard cause i thought maybe there was some trick i wasn't aware of and i didn't want to mess it up. this is my first sr, if never had this problem with my rd. can anyone help? thanks.
|
|
|
|
Post by colinjay on Aug 27, 2007 22:01:00 GMT -5
You have found one of the unfortunate realities of working on old bikes, lack of proper maintenance by previous owners. The swingarm bolt passes through a sleeve (steel tube) that the swingarm needle bearing ride on. Unfortunatly if the "bolt" isn't greased when it is inserted, or even is it was and hasn't been removed in the last 20 years, they corrode and fuse to the pivot sleeve.
You have two basic options;
1. Try and gently pry the frame away from the swingarm and use a hacksaw to cut both ends of of the pivot bolt, but this is very difficult and hard work, or,
2. Take a bloody big hammer (a sledge hammer even) and with someone bracing the bike from the opposite side, beat the living crap out of the bolt until it comes out.
Either way you have to destroy the pivot bolt, and you will probably find that the needle bearings and the pivot sleave are knackered when you get it apart.
CJ
|
|
|
|
Post by wotavidone on Aug 27, 2007 22:16:21 GMT -5
On the subject of swing arm bolts, I wonder if the brand new one I bought for my DT 360 but never fitted would go in place of it?
Its got bushes rather than bearings, and the dust seals for the ends are narrower.
Anyone know?
Mick
|
|
lurch
Full Member
Posts: 217
|
Post by lurch on Aug 28, 2007 0:57:54 GMT -5
Hi
Also might try heating up the area around the swing arm pivot bolt and beating the crap out of it ,failing that you'll have to get the frame up on a hydraulic press or a fly press and push it out , I remember doing this on a old kawa triple years ago, Christ that was bloody hard work
Hope this helps
LURCH
|
|
|
|
Post by Bize on Aug 28, 2007 5:01:15 GMT -5
Ooooh ouch. When I got my SR, I was warned that this is what happens to these bikes when the grease nipple isn't used to lube up the pivot at service time  |
|
|
|
Post by vtwinton on Aug 28, 2007 9:23:54 GMT -5
ok, thanks. i'll try a bigger hammer.
|
|
|
|
Post by sjef on Aug 28, 2007 10:56:43 GMT -5
Hallo ,
you might try this, infuse the swing arm with wd 40 or some other rust(b)eater.
then release the nut, place a few washers under it and tighten the whole, if you are lucky the axle is pulled out slowly by turning the nut. if not you willl damage the thread and you have to take severe measures.
and remember : if it won work with brute force, take a bigger hammer ;D
|
|
|
|
Post by colinjay on Aug 28, 2007 17:45:35 GMT -5
Heating the swingarm pivot generally doesn't have much effect, as the bolt is seized inside the inner sleeve, and it is hard to get the heat to penertrate that far into the swingarm assembly.
Also, you can pump as much grease as you like into a grease nipple (if one is fitted) and still have the bolt seize in the sleeve, as theere are no holes in the sleeve to allow grease to penertrate between the bolt and sleeve. I have know some people who have drilled holes in the pivot sleeve so that grease can get to the bolt, but I just remove the pivot bolt once a year and grease it.
CJ
|
|
|
|
Post by Bize on Aug 29, 2007 5:31:09 GMT -5
Really Colinjay? Well there's another difference between the 500 and the 400 then.
With the 400, you unscrew a small bolt out of the end of the pivot and screw in the grease nipple (which stores in the lid of the tool box). The spindle has holes and so does the sleeve, that corrospond with the roller bearings. I've had one apart and it all seems to work fine.
|
|
|
|
Post by colinjay on Aug 29, 2007 17:32:07 GMT -5
Bize,
All my SR500's are E models and don't have what you describe. Obviously Yamaha realised the errors or the original design and made a change for the better on the 400's.
CJ
|
|
|
|
Post by Bize on Aug 30, 2007 7:02:24 GMT -5
Yeah that seems to be the theme Colinjay. Yamaha also improved on the internal engine lubrication with additional drillings and the like, didn't they?
|
|
|
|
Post by grambo on Oct 5, 2007 13:45:12 GMT -5
I figure I would give my two cents because I had this same problem on my 1981 sr500. I spent lots of time tearing down the bike and labeling all the parts so that I can put it back together (eventually). The ONLY thing left was to get the swingarm out, which wouldn't budge. So I spent all sorts of time on this forum looking to see if anyone had a similar problem. Finally, I talked to my old high school auto teacher and he said beat the living crap out of it. Anyways, what worked well for me was to use JB Blaster (I think its called that) or any kind of penetrating oil. I applied it several times over a couple of days and whacked the pivot bolt until it came out (I had to use a sledge hammer). Long story short, hit it hard, and buy a new pivot arm. P.S. Anyone have a pivot arm and a couple of bolts they would part with?  |
|
jeffz
Full Member
Posts: 215
|
Post by jeffz on Oct 5, 2007 14:56:07 GMT -5
Grambo, I think you are referring to PB Blaster. Works great, but smells awful.
|
|
|
|
Post by Bize on Oct 6, 2007 7:43:33 GMT -5
P.S. Anyone have a pivot arm and a couple of bolts they would part with? Take the opportunity to upgrade with SR400 parts. |
|
|
|
Post by davedunsboro on Nov 1, 2007 7:41:13 GMT -5
Boy oh boy did I have dramas removing my pinion bolt this arvo CRC for 2 weeks no, hammer no, bigger hammer no,frame in press& 20tons of pressure (knackered it ) but no,added heat no soI made up a spreader out of 16mm threaded rod & nuts , put it inside the footpeg holes & spread the frame about 2mm . This gave just enough room to just get the hacksaw in & I cut the sucker out & belted out the other bits left in the frame separately .Now the bolt is still in the sleeve(I think I may just need another of those). But now I can at least get the frame blasted & coated so all is good . Another thing that I've noticed is I've got 2x 82 frames 1 is a drum brake type the other is disk type but this is the interesting bit , they are both made 2/82 the serial Nos are 4F3-010634(disk) 4F3010651(drum) so somewhere in 17 frames they changed it ? Oh yes & my 7/78 frame is the same as my first 82 frame and is a disk type so the good bit for me is that my 82 that is complete is original & the disk is correct for it ( I thought it was wrong as the bike was in bits when I got it & I assumed it was supposed to be a drum swingarm setup) man I must be obsessed to have worked that out?The main reason for all this ho hum is that I want 1 original SR 500 & one to express my self with & I wanted to make sure I got it right . So it s the 78 frame the black donk & whatever goes & fits . I'm thinking dark blue frame & yellow tank /covers ,ducktail with a little chrome& black & one of those bullet train type fairings . So its a hunting I will go cheers Dave.
|
|
