Pump Repair

[binna]

I have a Nortrac(Lovol/Foton) 25 XT or TE254 25 HP with a shibura/Perkins 3 Cylinder Diesel 1st. Let me state that Northern Tool is replacing the Hydraulic Pump free of charge so that is all good, but befoe they agreed to replace the pump I went to the internet to try and find one in case they didn't replace it. I can't find that pump anywhere it has Made in Japan on the pump so that could be the reason. Anyway I would like to get this one repaired for backup, the pump is OK it is the bottom 2 ears that mount it to the engine, looks like cast iron to me and that is a hard product to repair but I would be interested if anyone knows of a company that might be able to re attach the 2 broken mounting parts I have attached a couple of pictures of the pump. Thanks Larry

 

[jaxs]

It does look to be cast but I doubt it's iron. Is it magnetic? Even if the material can be welded,the face will need to be machined flat. Would losing a few .001 off face effect alighment of drive gear? I'd keep looking for the part.

 

[CoyPatton]

A good welding shop can weld those back on. It will not be cheap. It will also destroy any seals in the pump, as well as you will need to take it to a machine shop following the welding to have have the surface redone. This could as previously stated effect the alignment of internal components.

 

[Seven Gables]

Curious what could of snapped the ears off?

 

[binna]

Not sure as why there broke, looking on a web site for Japanese parts they showing hydraulic pumps made out of aluminum and it could be but I have no way to tell, the broken coller detaches so IF it could be repaired it would necessarily affect the pump. Machiining the face could be the downfall of a repair. Every supplier that initially said they had it when I sent the pictures and the Part number on the pump they all said it wouldn't fin and some just said they had never seen a pump like that, Luckily like I said Northern Tool has one on the way but if that happens again, they also said this was a one time replacement. So that is why I have been looking to either repair the old or find a supplier for the pump. Northern's pride is $ 1,057.00 before tax or shipping and they are sending it 2nd day air so I can get up and running. Any help on this will be greatly appreciated.Thanks

 

[mrmikey]

Quite a few years back I repaired a somewhat similar pump, same problem, and it was aluminum. Main difference being the pump had a flange that went into a bore, the installer didn't confirm the pump was fully into the bore that it mounted to, tightened up the bolts and 'snap' went the lugs.
I took the pump apart, cleaned it up to get rid of any oil, V'd it out, mostly on the back side, and clamped the parts to a piece of 1" thick flatbar to keep it flat. Ended up grinding the weld flush on the face once it cooled off. To my knowledge it's still going.
If you're worried about the repaired surface not being 100% flat, use a thin piece of gasket paper between the mating surfaces. Obviously it's not going to mhelp if the surface is miles out of flat but it'll take care of any minor flatness issues ...........Mike

 

[binna]

Mike

How did you repair it weld or? If you look at the pictues one face is inside the pump but the O rings might compesate for not having a machined surface Your thoughts


Larry

 

[mrmikey]

Hey Larry,
I tigged it after making sure it was clean and bevelled it mostly on the back side before I clamped it down to the plate. That way, there ws very little welding to do on the machined side.
Can't see where you mean one side is inside the pump, if you have to deal with an O ring groove it may mean a bit of machining after welding, still shouldn't be a big deal tho..........Mike

 

[binna]

MIke what rod did you use I have an arc and wire fed welder


Larry

 

[mrmikey]

I tigged it, used 4043 rod, seems a bit more ductile. I could have used a wire feed but I like tig for castings as it gives you a chance to bubble the impurities out..........Mike