How to Dissasemble, Hynautics H42 Helm Pump

[barkdee]

Rebuilt the pump four years ago and can't remember how I got it apart. Does the back end pull off first? Is a gear puller needed to pull it? I believe there's a snap ring on the underside of the front end(steering wheel end) so the shaft needs to be pulled to get at it and the seals.

 

[jmooney]

Usually disassembles from the back . Plan some way to catch all the ball bearings.

 

[barkdee]

Removed the back plate but the shaft doesn't want to come out of the round piston housing. Tapped it lightly, don't want to whack it hard until I know it should come out. Yes, the ball bearings, I'm working on a folded up towel for that.

 

[dsharp]

You disassemble from the back. There’s a pin/keyway that you remove from the shaft then the shaft can be removed.

 

[barkdee]

ah, that's it, haven't removed the keyway. Thank you for the advice...

 

[drewread]

There is a Hynautic Manual with parts breakdowns that @Beachcomber uploaded to the resource area. It may not be the same model, but it may be helpful.

https://www.samsmarine.com/resources/hynautic-steering-manual.27/download

 

[barkdee]

Downloaded, thank you. Disassembled, now checking with Seatech if their HS-04 kit fits my H42-04 pump.
My pump doesn't have the uppermost ring/gasket in the A group of parts.