Balmar bush.

[IanCC]

Hi,
Trying to fit a balmar 6 series to my 3gm30f.
To line it up i need to shim it forward 3mm or so.
The problem is, the bush in the balmar is too far "in" to allow any movement.

So how do i press the bush back a little?

I have been onto Merlin, who i bought it from second hand, and also Balmar. Not much help either of them.

All input very much appreciated.

 

[Boater Sam]

Is this the normal split rear mounting bush? If so its split so that you can slide it into the correct position.

 

[IanCC]

Yes it's split. I haven't tried to shift it for fear of breaking the mount. Am i a bit dim and it's easy to move? Balmar told me i would be lucky to not break it.

 

[Poecheng]

Marine Alternator Installation - Tips & Tricks - Marine How To

 

[IanCC]

Marine Alternator Installation - Tips & Tricks - Marine How To

Thanks, yes seen that, but doesn't tell me how to move the bush.

 

[Poecheng]

Thanks, yes seen that, but doesn't tell me how to move the bush.

I haven't done it myself but, as I read it, in the section headed "Dual-Foot Alternator Rear Foot Bushing", the bush will move in by the desired amount so that it, and not the rear foot, is clamped by the nut. If it doesn't move in towards the engine mounting (and then stop) then it has no real purpose and could result in the breakage in the first photograph in that section, which it is designed to avoid.

Sorry, just to make it clear, I have assumed the tightening of the nut will move the bush into the appropriate position.

 

[IanCC]

I haven't done it myself but, as I read it, in the section headed "Dual-Foot Alternator Rear Foot Bushing", the bush will move in by the desired amount so that it, and not the rear foot, is clamped by the nut. If it doesn't move in towards the engine mounting (and then stop) then it has no real purpose and could result in the breakage in the first photograph in that section, which it is designed to avoid.

Sorry, just to make it clear, I have assumed the tightening of the nut will move the bush into the appropriate position.

Ah, no. I need to move it the other way. It is too far in on mine. Thanks for the effort, really appreciated.

 

[Poecheng]

I would hook the rear arm onto a block of wood (so that the inside end of the split bush is taking the weight) then put a socket over the other end of the bush and resting onto the rear arm itself and gently tap the socket so you are driving the rear arm down the bush (or the bush up into the socket).

Or some sort of puller if you can get it in there

 

[IanCC]

I would hook the rear arm onto a block of wood (so that the inside end of the split bush is taking the weight) then put a socket over the other end of the bush and resting onto the rear arm itself and gently tap the socket so you are driving the rear arm down the bush (or the bush up into the socket).

Or some sort of puller if you can get it in there

I think that is a good idea. Two person job perhaps but a good first option.

 

[Poecheng]

Yes, one to hold the alternator in place and one to break the rear arm gently tap the socket

 

[Boater Sam]

It will move easily, that is why it is split, so it will not bind in the end bracket.

 

[IanCC]

It will move easily, that is why it is split, so it will not bind in the end bracket.

Ok, i hope you are right.

 

[IanCC]

Is this the normal split rear mounting bush? If so its split so that you can slide it into the correct position.

No chance. It's in two layers. One split inside the other. Not going to budge easily.

 

[burgundyben]

Use a socket over one end and a nut and bolt with penny washers to wind it along to where you need it.

 

[penfold]

No chance. It's in two layers. One split inside the other. Not going to budge easily.

Can we have a picture? The bush is supposed to be readily moveable, two layers would make it easier to move as it would increase the springiness. If you have an assistant available get a tube or a socket that fits over the bush, sit the alternator on top of it on a bench or with the tube/socket in a vice and tap the bush downward, a piece of wood or a brass drift will do the job.

 

[burgundyben]

Can we have a picture? The bush is supposed to be readily moveable, two layers would make it easier to move as it would increase the springiness. If you have an assistant available get a tube or a socket that fits over the bush, sit the alternator on top of it on a bench or with the tube/socket in a vice and tap the bush downward, a piece of wood or a brass drift will do the job.

No whacking, it risks breaking the cast housing. Wind it along as I described above.

 

[IanCC]

Can we have a picture? The bush is supposed to be readily moveable, two layers would make it easier to move as it would increase the springiness. If you have an assistant available get a tube or a socket that fits over the bush, sit the alternator on top of it on a bench or with the tube/socket in a vice and tap the bush downward, a piece of wood or a brass drift will do the job.

 

[IanCC]

Use a socket over one end and a nut and bolt with penny washers to wind it along to where you need it.

Thanks but i am struggling to visualise this.

I thought about getting a long threaded bolt. Bolting it tight to other end of saddle, then using a nut on a penny washer to wind it back, all the while supporting casting with g clamp or similar.

 

[penfold]

G-clamp will do fine if you have one, no need for a bolt then; put a socket that's a loose fit over the bush on the side you want to move the bush towards.

 

[Boater Sam]

Get a socket that is bigger inside than the bush . Put the socket in a vice or on a block to support it.
Sit the bush over the socket so that the ally end mount is sat on the rim of the socket and tap the bush into the socket.