PTO Pump - removing drive thing from input shaft

[aesmith]

Hi,
Wasn't sure what to put as the subject as I don't know what this part is properly called. To explain this is a PTO driven water pump, leaking from the seal around the input shaft. So when it's used it doesn't want to prime, and even when revved right up it discharges as much air as it does water. The data plate calls it "8 Roller Vane Pump".

The "thing" I need to remove is an aluminium cylinder with internal splines to engage the PTO drive. It was originally retained by two roll pins, now removed, but it does not want to come off. So I'm looking for ideas to remove it, without damaging the parts. In the photos I've removed the sleeve and balls that latch it onto the drive shaft. One photo showing the pump as a hole, one looking down inside the splines, and one sideways showing that there's not a lot of space between the "thing" and the body, and the face slopes just to make it more difficult for anything to grab it there. Any ideas welcome, thanks.

 

[carbon]

Gently heating the aluminium pto coupling may help with the removal but it will possibly need a bearing puller to remove it successfully

 

[anto44]

I'd start by heating up the aluminium part with a hot air gun and when it's nice and hot pour some diesel down into it and let it soak down and then try a pullers with one of these.

 

[MoreWellie]

Not sure I can describe what I have in my mind but here goes

Looking at the side view I think I would try and make something in two halves that would bolt together around the gap and would ideally be machined to match the slope at the bottom of the shiny bit. If you could make the two bits bolt together strongly enough then you could potentially use a puller on to this and down the centre hole on to the end of the shaft

Edit: @anto44 must redo my tin foil hat, looks like my thoughts are leaking again

 

[Seadog]

Something like in the post before you, perhaps,

 

[wyn]

Those couplings are readily available for around £10.
It wouldn't be the end of the world to slice it off with a grinder and chuck a new one on.

 

[aesmith]

Those couplings are readily available for around £10.
It wouldn't be the end of the world to slice it off with a grinder and chuck a new one on.

You wouldn't happen to have a link do you?

 

[m_c]

Before getting too complicated with pullers, I'd try wedging it in a vice so it's held by the coupler, stick a short bolt/bar through the top hole in the coupler (long enough to anchor it in the vice without blocking access down the centre) to stop it sliding out the vice jaws, and give the pump shaft a few good hits with a big hammer and punch/drift.

 

[wyn]

You wouldn't happen to have a link do you?

There are a couple on this page from Malpas tractors

Agriline have a few

 

[MoreWellie]

Something like in the post before you, perhaps,

Cheap shot sir, I posted mine without the other one being there

Accurate though I suppose

 

[Seadog]

Well, if you look at the time of posting...

 

[Turbo]

As has been said, a bearing separator may work but you are trying to remove an aluminium sleeve from a steel shaft that has been liberally doused with water, so it will be well corroded on!

Before you start putting money into this, have you ever had this pump running properly? If not you will be disappointed by its performance when you do get it working! They were the poor mans pressure washer back in the day, my Dad had several & they were rubbish & failed after a couple of years usually leaking everywhere or not pumping as the internal bits had failed!

I eventually got my Dad talked into buying an electric interpump washer & it was a million miles better in every way & it is still running nearly 30 years later!

Even a cheap electric pressure washer from lidl will probably out perform one of those pto units!

 

[Turbo]

There are a couple on this page from Malpas tractors

Agriline have a few

These may not work unless you buy the one that has a qrc fitted like the ops original one but they are £45!

 

[aesmith]

Before you start putting money into this, have you ever had this pump running properly? If not you will be disappointed by its performance when you do get it working! They were the poor mans pressure washer back in the day, my Dad had several & they were rubbish & failed after a couple of years usually leaking everywhere or not pumping as the internal bits had failed!

No I've not really seen it working as it should. What I hope to use it for is filling water butts carried on the back of the tractor for watering newly planted trees or hedging. There's no power anywhere near the water supplies, so at the moment I use a hand pump.