OP
@birdsnest avatar
UTC

Not So Moderator
VNB VSC 09C VMA VSX - vbc vmb
Joined: UTC
Posts: 8033
Location: Hustletown, TX
 
Not So Moderator
@birdsnest avatar
VNB VSC 09C VMA VSX - vbc vmb
Joined: UTC
Posts: 8033
Location: Hustletown, TX
UTC quote
Been outta town for about ten days. Got back Wed and had time last night to get back under the P. The split pin is just knackered beyond belief now. I tried to cut it with a dremel and just made a mess of one end (see red arrow in pic below). I can get a decent grip on the end with the green arrow, so there's still hope...

External inline image provided by member with no explanatory text

Any more suggestions would be greatly appreciated. I have probably spent the better part of 3 hours working at this split pin. Really... just ridiculous.

Another view:
External inline image provided by member with no explanatory text

Just for grins... I think it may have been leaking oil for a few years before I got it... 8)

External inline image provided by member with no explanatory text


Again, if you guys have any Split Pin ideas I am all ears...

TIA
@oultondave avatar
UTC

Molto Verboso
Blue 70th anniversary Vespa GTS 300
Joined: UTC
Posts: 1305
Location: Leeds, Yorkshire, England
 
Molto Verboso
@oultondave avatar
Blue 70th anniversary Vespa GTS 300
Joined: UTC
Posts: 1305
Location: Leeds, Yorkshire, England
UTC quote
Looking at the last photo I think a knackered cotter pin is the least of your worries. Good luck
@mdchanic avatar
UTC

Hooked
GS 160 /4
Joined: UTC
Posts: 402
Location: Maine, USA
 
Hooked
@mdchanic avatar
GS 160 /4
Joined: UTC
Posts: 402
Location: Maine, USA
UTC quote
Tell me if I'm wrong, but it looks like in this case, your axle has a hole drilled for a cm or so into its end, so that the center portion of the cotter pin is visible inside the hole when you look straight down on the axle (as in your middle photo).
[I note this because some axles are solid, without this hole].

Why not use a drill bit just a thousandth or two smaller than the center hole in the axle to drill through (and obliterate) the center portion of the cotter pin, thus allowing you to poke the remaining bits out with a hooked instrument of your own device?

Since the cotter pin is made of very soft steel, and the axle is made of hard steel, there is only the most minimal chance of bollocksing it up.

Good luck!

- Eric
@senkun avatar
UTC

Hooked
Primavera 125 ET3 "Big Butt"
Joined: UTC
Posts: 153
Location: The Very Far East
 
Hooked
@senkun avatar
Primavera 125 ET3 "Big Butt"
Joined: UTC
Posts: 153
Location: The Very Far East
UTC quote
hang on, in your 2nd pic, seems the problem with your overly reluctant splitpin is obvious. Can you try wrenching on the nut and get it to move a tad so that the splitpin isn't wedged against the axle end?
OP
@birdsnest avatar
UTC

Not So Moderator
VNB VSC 09C VMA VSX - vbc vmb
Joined: UTC
Posts: 8033
Location: Hustletown, TX
 
Not So Moderator
@birdsnest avatar
VNB VSC 09C VMA VSX - vbc vmb
Joined: UTC
Posts: 8033
Location: Hustletown, TX
UTC quote
Been there already Senkun, good eye though...
@rover_eric avatar
UTC

Moderator
1965 Vespa SS180, 1963 Lambretta LI150
Joined: UTC
Posts: 6980
Location: Detroit, Michigan
 
Moderator
@rover_eric avatar
1965 Vespa SS180, 1963 Lambretta LI150
Joined: UTC
Posts: 6980
Location: Detroit, Michigan
UTC quote
this really shouldn't be THIS hard.
OP
@birdsnest avatar
UTC

Not So Moderator
VNB VSC 09C VMA VSX - vbc vmb
Joined: UTC
Posts: 8033
Location: Hustletown, TX
 
Not So Moderator
@birdsnest avatar
VNB VSC 09C VMA VSX - vbc vmb
Joined: UTC
Posts: 8033
Location: Hustletown, TX
UTC quote
Quote:
Why not use a drill bit just a thousandth or two smaller than the center hole in the axle to drill through (and obliterate) the center portion of the cotter pin, thus allowing you to poke the remaining bits out with a hooked instrument of your own device?
Thanks. I think that is the option of last resort... but I suppose we are there at this point. My worry was always if I have a go at the center of the pin it may end up with two stuck halves and just double my problem.

Question: If I did manage to split the pin in the center, how much damage would I do to the axle by taking a breaker bar to the nut and just trying to muscle it off?
UTC

Hooked
1974 Rally 200, 2009 Yamaha C3, 2010 Honda SH150i
Joined: UTC
Posts: 403
Location: san francisco
 
Hooked
1974 Rally 200, 2009 Yamaha C3, 2010 Honda SH150i
Joined: UTC
Posts: 403
Location: san francisco
UTC quote
senkun wrote:
hang on, in your 2nd pic, seems the problem with your overly reluctant splitpin is obvious. Can you try wrenching on the nut and get it to move a tad so that the splitpin isn't wedged against the axle end?
exactly. get a long wrench, closed end on one side, open ended on the other. thread a nut just flush onto a hub bolt, then put the closed end of that wrench onto it. a big wrench, like 7/8 or similar. brace the hub with the open end of the wrench onto the case arm.

get a bigass 1/2 inch socket wrench, or whatever tool you can generate enough torque to tighten that axle bolt enough to get daylight on both sides of the cotter pin and the hole in the axle. then just pluck that fucker out.

edit: the axle nut backed out against the cotter pin. that's the problem, as well as the key to the solution.
@senkun avatar
UTC

Hooked
Primavera 125 ET3 "Big Butt"
Joined: UTC
Posts: 153
Location: The Very Far East
 
Hooked
@senkun avatar
Primavera 125 ET3 "Big Butt"
Joined: UTC
Posts: 153
Location: The Very Far East
UTC quote
Eloquently put. This is the clearest pic I've seen of a cotter pin doing it's job, keeping the nut from backing out and losing your wheel on the highway.
aaron h. wrote:
senkun wrote:
hang on, in your 2nd pic, seems the problem with your overly reluctant splitpin is obvious. Can you try wrenching on the nut and get it to move a tad so that the splitpin isn't wedged against the axle end?
exactly. get a long wrench, closed end on one side, open ended on the other. thread a nut just flush onto a hub bolt, then put the closed end of that wrench onto it. a big wrench, like 7/8 or similar. brace the hub with the open end of the wrench onto the case arm.

get a bigass 1/2 inch socket wrench, or whatever tool you can generate enough torque to tighten that axle bolt enough to get daylight on both sides of the cotter pin and the hole in the axle. then just pluck that fucker out.

edit: the axle nut backed out against the cotter pin. that's the problem, as well as the key to the solution.
OP
@birdsnest avatar
UTC

Not So Moderator
VNB VSC 09C VMA VSX - vbc vmb
Joined: UTC
Posts: 8033
Location: Hustletown, TX
 
Not So Moderator
@birdsnest avatar
VNB VSC 09C VMA VSX - vbc vmb
Joined: UTC
Posts: 8033
Location: Hustletown, TX
UTC quote
aaron h. wrote:
senkun wrote:
hang on, in your 2nd pic, seems the problem with your overly reluctant splitpin is obvious. Can you try wrenching on the nut and get it to move a tad so that the splitpin isn't wedged against the axle end?
exactly. get a long wrench, closed end on one side, open ended on the other. thread a nut just flush onto a hub bolt, then put the closed end of that wrench onto it. a big wrench, like 7/8 or similar. brace the hub with the open end of the wrench onto the case arm.

get a bigass 1/2 inch socket wrench, or whatever tool you can generate enough torque to tighten that axle bolt enough to get daylight on both sides of the cotter pin and the hole in the axle. then just pluck that fucker out.

edit: the axle nut backed out against the cotter pin. that's the problem, as well as the key to the solution.
As mentioned above I tried to move the nut with no luck, but not by the method you mention above... I'll give it a shot when I get back to the house this afternoon. Thanks.
UTC

Hooked
1974 Rally 200, 2009 Yamaha C3, 2010 Honda SH150i
Joined: UTC
Posts: 403
Location: san francisco
 
Hooked
1974 Rally 200, 2009 Yamaha C3, 2010 Honda SH150i
Joined: UTC
Posts: 403
Location: san francisco
UTC quote
Birdsnest wrote:
aaron h. wrote:
senkun wrote:
hang on, in your 2nd pic, seems the problem with your overly reluctant splitpin is obvious. Can you try wrenching on the nut and get it to move a tad so that the splitpin isn't wedged against the axle end?
exactly. get a long wrench, closed end on one side, open ended on the other. thread a nut just flush onto a hub bolt, then put the closed end of that wrench onto it. a big wrench, like 7/8 or similar. brace the hub with the open end of the wrench onto the case arm.

get a bigass 1/2 inch socket wrench, or whatever tool you can generate enough torque to tighten that axle bolt enough to get daylight on both sides of the cotter pin and the hole in the axle. then just pluck that fucker out.

edit: the axle nut backed out against the cotter pin. that's the problem, as well as the key to the solution.
As mentioned above I tried to move the nut with no luck, but not by the method you mention above... I'll give it a shot when I get back to the house this afternoon. Thanks.
if an engine is out of the bike, it's the only method that works. but it works every time. still, the least aggravating method is to deal with that nut as a matter of course before undoing the rear brake cable and removing the engine from the bike.
OP
@birdsnest avatar
UTC

Not So Moderator
VNB VSC 09C VMA VSX - vbc vmb
Joined: UTC
Posts: 8033
Location: Hustletown, TX
 
Not So Moderator
@birdsnest avatar
VNB VSC 09C VMA VSX - vbc vmb
Joined: UTC
Posts: 8033
Location: Hustletown, TX
UTC quote
Success. Finally.

Socket wrench still wouldn't budge the nut, soI had to get a breaker bar to get enough umph on it. But once turned you could see the split pin was bound up like a bread tie right as it entered the axle.

It still wouldn't come out. I took the dremel (carbide cutting bit) and sliced the bastage in half. Then I got the better half and she hammered with a punch while I pulled...

I swear I heard a small chorus of angels when it popped out.

Senkun, Aaron, MDchanic... Thanks!
DoubleGood Design banner

Modern Vespa is the premier site for modern Vespa and Piaggio scooters. Vespa GTS300, GTS250, GTV, GT200, LX150, LXS, ET4, ET2, MP3, Fuoco, Elettrica and more.

Buy Me A Coffee
 

Shop on Amazon with Modern Vespa

Modern Vespa is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to amazon.com


All Content Copyright 2005-2024 by Modern Vespa.
All Rights Reserved.


[ Time: 0.0276s ][ Queries: 3 (0.0038s) ][ Debug on ][ 313 ][ Thing One ]