Telehandles boom pin

[printcom]

I have got to make up a pin for the main boom on a Matbro telehandler, Have you got any suggestions on what steel I should be using - I am leaning along the lines of EN8 because I have to weld the pin stay to it.

 

[Gareth0123]

When I worked as an R&D engineer for Sanderson/Claas/Caterpillar on the telehandler products all of our pins were made of EN16T, and they were heat treated and then chemically surface hardened after welding.......

However, it was not unknown for us in the dev workshop to either mig or stick weld a pin from EN16T whilst it was stood in a 25 litre can of water to keep the HEZ to just round the weld and away from any load or wear points.

 

[Badger1bear]

any good to ya ?

http://www.ebay.co.uk/itm/MATBRO-PI...375?pt=LH_DefaultDomain_3&hash=item27e226b24f

 

[blenkie1]

Replacing the main boom pin on a forwarder. Price £1800.00. Oh plus delivery £45.00

 

[printcom]

Thanks badger1bear it just might be - I'll check part numbers tomorrow.

 

[Badger1bear]

it looks like he is having a clearout of matbro stock, maybe worth a pm to him

 

[Badger1bear]

Thanks badger1bear it just might be - I'll check part numbers tomorrow.

let us know if you have a result

 

[Badger1bear]

any news fella ?

 

[printcom]

I couldn't get hold of anybody yesterday, I will try again tomorrow.

 

[Badger1bear]

keep us posted bud

 

[printcom]

Typical farmer, this Matbro didn't turn up until 4 pm. Getting the old pin out was something of a challenge. No way to drift it out so a bit of pipe welded to the pin and a slide hammer got the sod. Apparently these were replaced less than 1500 hours ago - I will post a few pictures of the bushing tomorrow when I have cleaned it up - see if you can spot the reason for the premature failure. In the meantime here's a picture of the pin, judging by the way the file marks it easily my money is on it being mild steel.
I have emailed that chap with the Matbro pin to find out what size it is and if he can get a bushing otherwise I am going to have to make a new bushing as well. Any suggestions as to which material to use.

 

[Badger1bear]

my money would also be on NOT greasing it often enough, on the side of the arm where the pin came out was there trails of rusty water that had dried ? it goes a rusty brown red oxide look........ I know some ****** idiots that dont grease the company machines and when there is a problem there is always a bucket and a half of fresh grease wound in to the grease nipple to cover up their cock ups. They think your born yesterday.

 

[Badger1bear]

The pin is locked in position by the tab on the end with the securing bolt, thats why there is no real wear on the ends of the pin, the bushing in the main lifting arm will be worn and thats going to give those tell tail score marks nearer towards the middle of the pin.......... lack of grease has always been the culprit

 

[Badger1bear]

give this place a call

http://www.matbro-man.co.uk/matbro-parts.html

 

[The_Yellow_Ardvark]

When I worked on Lorry loader cranes we would see that sort of damage on a daily basis

As already said, lack of grease was the biggest issue, coupled with some operators using cheap aftermarket parts. Some ram pins were so soft they bent when being drifted in.

One thing we did come across was when pins were greased the old stuff was never cleaned away, or a dust seal was missing. So when you pumped in new grease it dragged the rubbish in with it and you got a nice grinding paste.

The bushing should always be replaced whenever the pin is replaced. I don’t know what is the best material to make them out off, as it was always best in the long run to buy the correct part. Well get the customer to buy one.

Before you put it all back together give the whole area a dam good clean out.

 

[Bill Edwards]

Same story almost every time. Normally a lack of grease, or somebody who thinks they've done a great job of keeping it greased without wiping off the fittings first, or making sure the grease is actually going into the joint.
On the positive side, if people knew how to use a grease gun and could be bothered to do so, plenty of us would be without work!

 

[Badger1bear]

if people knew how to use a grease gun and could be bothered to do so, plenty of us would be without work!

aint that the truth

 

[printcom]

You are right about the grease, although I must let the farmer off this time. If you look at the photos you will notice that the clown that rebushed this last time forgot to leave a way for the grease to get to the pin. This might take a while.....

 

[Badger1bear]

the well spoken amongst us pronounce PH as fffffff. I think that part looks phuq'ed

 

[normspanners]

Was that a rose type joint? rather than a bush it looks (slightly) concave .