Repairing a cracked Berg oil pump cover.

My score for cracked full flow oil pump covers is now 2. I've got a habit of overtightening the fittings.

The berg pressure relief cover is my latest victim.

I was wondering if the crack, which goes from the end of the fitting thread and extends towards the centre of the pump for about 10mm, can be ground back and braised. Would this make it an oil-tight repair?

I did an oxy welding course at TAFE and we had to braise two pieces of cast iron together. That makes me think the Berg pump cover, which I think is cast, can be repaired in a similar manner.

Oh, and does anyone know where I can get an oxy bottle refilled on the sly?

Thanks.

[ Edited on 25-4-2007 by fullnoise ]

Yes you can braze it up however I would braze a fitting in place so you never have to tighten it again and recrack it. I have also used metal epoxy (jbweld) to fix a cracked case around the oil pressure sender. Bonded an extension fitting in place. Never leaked.

I think you're right. I should have a go at brazing it not braising it. While the former would help sealing the later would simply make it taste better.

Brazing the fitting in is a great idea too. Thanks.

Where can you get JB weld? It might be good for future reference.

super cheap, bunnings etc.

If braising, onion and garlic help the infusion of oil :P

Loctite make a metal epoxy too. Make sur you clean all the bits uber clean so no residual oil gets in the way.

fullnoise wrote:I think you're right. I should have a go at brazing it not braising it. While the former would help sealing the later would simply make it taste better.

Brazing the fitting in is a great idea too. Thanks.

Where can you get JB weld? It might be good for future reference.

CT better off buying a new one

but if you do braze it up vee out the crack slightly so you have a better bond then you will have to surface face the cover as well and braze the fitting also good ldea

you may spend more time and money than the new cover is worth

I vee Grooved the crack on mine and mig welded it... fixed for good
use lots of the good thread tape and you should not have to tighten it to breaking point

if you have a steam cleaner that is probably the best way to remove the last bit of residual oil after your typical solvent wash.....

onions and garlic... lol.... love the play on words.

and check to make sure the heat does not distort the face of the plate.👍

Repair it CT,
but use a new one and keep the old as a spare.
If it lets you down somewhere it WILL disappoint.

Of interest is that most high pressure fittings use a "UN O-ring" system.
UNF thread with an O-ring to seal.
These can handle thousands of PSI and tighten up to a shoulder.
You might like to make or modify a new one to this.
Any hydraulics place can supply the fittings.
Why Bergs, and others, went to a taper is a mystery, but is probably smart marketing.