Broken pin

camelgas · 04 November 2016, 18:28

While stripping the yam down to change the impellor in the water pump:

A pin/dowel that I presume is hardened steel snapped off. I have been able to remove one half, the other half it just below the surface of the machined ali casting !.

What is the best way to remove it ?, its a blind hole with no access from the other side. Its a small pin perhaps 3 mm diameter.

jeffstevens763@g · 04 November 2016, 18:41

Very carefully drill it out with a very good drill bit centre pop it first in the centre.

Cheers

A1an · 04 November 2016, 18:47

Is it the locating dowel that lines the gearbox to the mid section?

camelgas · 04 November 2016, 20:27

Quote:

Originally Posted by A1an

Is it the locating dowel that lines the gearbox to the mid section?

NO, its one of 2 small pins that locates the pump cover housing onto the gearcase.

The broken bit is in the ali gearcase.

I thought that you could not drill hardened pins ?

A1an · 04 November 2016, 21:17

It'll be as hard as a goats knee.

Silly question but is it needed? isn't there 4 bolts that keep everything in place?

breezeblock · 04 November 2016, 21:28

Quote:

Originally Posted by camelgas

NO, its one of 2 small pins that locates the pump cover housing onto the gearcase.

The broken bit is in the ali gearcase.

I thought that you could not drill hardened pins ?

you can with carbide drills depending on hardness

jeffstevens763@g · 04 November 2016, 22:05

Aren't they stainless steel?

breezeblock · 04 November 2016, 22:06

test with a Magnet

Pikey Dave · 04 November 2016, 23:30

Quote:

Originally Posted by breezeblock

test with a Magnet

Not a definitive test for stainless

breezeblock · 05 November 2016, 07:24

Quote:

Originally Posted by Pikey Dave

Not a definitive test for stainless

between a magnet and a file you can at least ascertain whether you can machine it easily and what course of action should be taken

camelgas · 05 November 2016, 07:41

I have the cover off, it is fine. Cover was held on by 2 bolts with 2 pins.

There is nothing sticking out to "test" as its snapped just below the finnished face of the casting.

jeffstevens763@g · 05 November 2016, 10:42

They are there just to locate the housing whilst it's bolted I would jut bolt it down it's not going anywhere

Last Tango · 05 November 2016, 11:23

Quote:

Originally Posted by jeffstevens763@g

They are there just to locate the housing whilst it's bolted I would jut bolt it down it's not going anywhere

+1

You're just going to do more damage trying to get the thing out. Forget it.