hydraulics

[mark]

is it me or is the pump a long way out of alignment with the shaft ?

if so it will twist the joint all the time its turning ,this is why things like car prop shafts have 2 joints so it can be out of line but in alignment

talking of which would a rubber guibo prop coupling from a car work on this set up , they are less touchy about the shaft and spline (pump in this case ) being a touch out of line

this is a car prop one
UNI GUIBO COUPLING E30 E36 E46 E12 E28 E34 E24 23 32 Z3 on eBay, also, Other Car Parts, Accessories, Car Parts, Accessories, Cars, Bikes, Boats (end time 17-May-08 02:12:32 BST)
you can get smaller ones for steering columns with a clamp built in

had thought about some sort or rubbery coupling but had no idea where to start looking! ta muchly!!

each of the bearing saddles on the main shaft incorporates a big rose joint so there's a fair bit give in terms of alignment, but its not that far out anyway...

but now you mention it... steering column with 2 U/J's in.... might be the very thing

I might also just try fit one of the pulleys direct to the shaft - surely a more efficient/simpler way for the whole doings??

out of curiosity, being a hydraulics numpty, are hydraulic pumps Bi-directional - ie you can spin em in either direction and they'll still work (as long as you reverse the hoses that is)

[davem2005]

Mark
The driveshaft from a hillman imp contains a nice rubber UJ commonly used on jet drives on boats. May be worth googling IMP spares.

Hydraulic pumps are not reversable the reverse is done in the valve port mechanism.

Cheers
Dave

[5150]

see if you can find a steering shaft off something like a VW Beetle or Golf, it should be the same as my 924 has - it's about 2' long with joints on each end, you'd be able to cut it down to fit no bother.

[davem2005]

The problem with a UJ on a steering shaft is its designed to be as light as posible with a max turn rate of a few turns a minute. The Pump is probably rated at 1500 rpm. This does not give reliability in the long term.

Suggestion would be to remove pump, sprocket,shaft and bearing as a unit and rebuild the whole assembly in the work shop on a steeel subframe. Get it allaligned etc. Then take the whole thing back to the boat and bolt it to the readily available oak timbers with the only worry of aligning the sprocket of the chain drive. Far easier than trying to site build it and in theory you can do away with the UJ alltogether. Remove eveything in picture two and rebuild it as a bolt on item.

Cheers
Dave

[braine]

Best idea would be to mount the pump on a new baseplate with some adjustment for belt tension. Fit a new pulley to the original pump shaft and drive it direct with the belts. The history of the Pansy and the effort you lads have put in so far deserves a good job being done and not another lash up. From the pump pics it looks like a lorry power steering pump and the clear plastic pipe looks to be a bit nipped. Hinge the mounting plate nearest the drive end with the adjuster moving the plate up / down. You could probably use one off an old lathe / drilling machine motor mounting plate and use the original checker plate mount welded on the new plate. this would make it easier to get to and service.

[Alfie]

If the unit is servicable and the only problem is the shaft spins on the joint then a simple shaft collar would suffice in the short term. Minimil cost and would allow you to get on with other things.

[mark]

Best idea would be to mount the pump on a new baseplate with some adjustment for belt tension. Fit a new pulley to the original pump shaft and drive it direct with the belts. The history of the Pansy and the effort you lads have put in so far deserves a good job being done and not another lash up. From the pump pics it looks like a lorry power steering pump and the clear plastic pipe looks to be a bit nipped. Hinge the mounting plate nearest the drive end with the adjuster moving the plate up / down. You could probably use one off an old lathe / drilling machine motor mounting plate and use the original checker plate mount welded on the new plate. this would make it easier to get to and service.

thats the target I reckon, off out shortly to see what can be scrounged, might have a pump of a tractor with a PTO plate that I can maybe fix a pulley to directly

curiously alfie, there's a shaft collar already on one end of the U/J but not the pump end??

[braine]

The spare pulleys on the other end of the shaft look about right. You could machine a bush to fit if the bore is too big with a couple of locking screws or even a keyway. The holes in the pulley will (hopefully) allow access to the fixing bolts for the pump itself. If I was 20 years younger and 10 stone lighter I would give you a hand!

[mark]

been advised the pump is just plain wrong!

its off a dust cart/sweeper apparently, and is not a full pressure continuous demand pump, so although it tested fine, it ain't up tot he job,

stripped the whole malarkey yesterday, pulleys included, main shaft diameter is 25mm, the pump shaft is 15, so had thought about trying to machine a bush to adapt a pulley to go straight on the pump, but looks like a new pump is in order....

been offered one so far, but is total over kill - Its off a JCB

[The Great Wallsendo]

Try this...it's prob a lot cheaper too



Can be welded straight onto the pulley wheels

Whenever you need to turn simply adjust the Lemonometer to Port or Starboard

[mickthefish]

mark , are you aware of Boats for Sale UK & Ireland - Findafishingboat.com ?
might be worth keeping an eye on the 'hydraulics' section under the classified tab thing.

[mark]

mark , are you aware of Boats for Sale UK & Ireland - Findafishingboat.com ?
might be worth keeping an eye on the 'hydraulics' section under the classified tab thing.

aye, I keep looking on there, tends to be full systems though.

got a guy that works for Pirtek on the case at the minute

[Codfather]

Pirtek certainly know hyraulics, thats handy having a mate working for them.

We've used them a few times at work.