Raymainre Autopilot Pump Rebuild

[belizesailor]

I have an Raymarine hydraulic autopilot system (type 1 pump). When the seals on the original pump started to leak (after almost 8 years ... not bad), I acquired a new pump (via eBay at a great price). The electric motor of the original pump is just fine, but the shaft seal for the connection between drive and pump head needs to be replaced. Otherwise the pump head is in good shape.

I tried to remove the seal and could not get it out (damaged it in the process, but needs to be replaced anyway...)

Has anyone worked on this model of pump? How to remove/replace the seal? Source for the seal?

Pic's of pump head attached.

Thanks.

[NahanniV]

Was the seal you removed something like this:

If so, easiest thing to do is take it to a bearing supply or industrial supply shop and they will match it up. You should be able to press the new one in by hand.

With this type of lip seal, you must also be sure that the shaft is clean and smooth.

Are you sure that the bearings are OK, a wobbly shaft can cause a seal to fail.

Also, you need to keep the gritty stuff in your picture out of the pump.

[44'cruisingcat]

Yep, bearing shop, or hydraulic specialist. Take the motor too, so they can get the shaft size.

The'll use a hook device to get the seal out, and it does get wrecked in the process.

[NahanniV]

Sorry, re-read your post and see that the seal is still in.

Looking at the picture it looks like a combined seal and bearing, but you will have to remove it from the other side by removing the pump.

[belizesailor]

Originally Posted by NahanniV

Was the seal you removed something like this:

If so, easiest thing to do is take it to a bearing supply or industrial supply shop and they will match it up. You should be able to press the new one in by hand.

With this type of lip seal, you must also be sure that the shaft is clean and smooth.

Are you sure that the bearings are OK, a wobbly shaft can cause a seal to fail.

Also, you need to keep the gritty stuff in your picture out of the pump.

No, unfortunately it is not a typical oil seal. Must be pressed in, or somehow otherwise secured.

I will probably try and get it by a hydraulic shop in the City (Guatemala City).....somewhere in the bowels of Zona 1 you can find whatever kind of service you need...finding it is the tough part.

Thanks.

[NahanniV]

I originally thought you had already removed the seal and the picture was showing the cylindrical depression where the seal had been.

After looking again I see that the seal is still in place.

Are those exposed ball bearings in the picture ?

I think you will need to get at the seal from the other side of the pump.

If that is a bearing/oil seal combination it will need to be pressed on.

Cheers,
John.

[belizesailor]

Seal is still in place. Could not get it out with picks/pushers I normally use on other seals (...was quite successful in making absolutely sure it is no longer serviceable though!).

Those concentric cylindrical recesses that you see in the second pic are where the motor mates to the pump head. The seal is recessed in the inner most ring.

No exposed ball bearings. The pump head breaks into two pieces once the 4 bolts are removed (4 bolts shown in bottom pic). This exposes the impellers and o-ring which seals the impeller cavity (all these parts are in fine shape).

The only piece which is giving me trouble is the round black seal visible in second picture. This is the seal through which the motor shaft passes. I originally assumed it was just a typical oil seal, but it refuses to come out.