Type 4 fan hub removal in situ!

anyone had any luck doing the above. Need to pop a new seal in there and not up for dropping the motor just now.

 

I believe it can be done. @Paul Weeding

 

Put metal plate between the case and the hub and wind fan bolts in through the hub against the plates of metal and it will pop off. Use a bit of heat if necessary but only on the hub and be careful

 

thanks, makes sense. Used a puller in the past but engine has always been on the deck.

 

I have done it with engine in situ on mine. I bought a small puller from Machinemart to do it which wasn't that expensive and made it pretty straightforward. You do need to remove the tin around the fan but other than that it's fine. The only complication is the centre bolt which on mine came off easily but on a friends bus engine had been rounded off a bit by a PO and we needed up having to pull the engine to get enough access and purchase on it.

 

I have a plate with the three fan holes, bolt it on over hub nut, unwind hub nut against it.

 

I do the same except I tighten the three bolts on the hub to pull the plate against the centre bolt.

 

I made a puller out of a thick bit of plate to keep the depth down to use in situ.

 

Im confused now. How can you pull the hub off if you've got the centre bolt still fitted?

 

Remove bold and washer, put bolt back as it is small and goes through fan hub

 

Im my case undo the cente bolt against the plate, or tighten the 3 bolts. Once it pops off remove everything by hand.
Doing it up will be more fun.

 

I've not made a puller yet, although I do have a lump of round bar waiting on me spending an hour or so on the lathe knocking a posh one up.... Currently I use a type 1 crank timing gear puller, as it just picks up on all 3 lugs, and a quick tap with a hammer and it's off!!

 

I put 3 pieces of plate steel between the flange and the casing and evenly wind in the 3 bolts ...mine popped off quite easily . I suppose if it becomes a raunge forget that and use apuller , you don't want to damage the casing .

 

I do it like this, Be careful using a puller as you could damage the thread in the crank where the bolt needs to go back in.

 

But be careful doing it like that, you don’t want a hole in the block.

 

Just smash a hole in it if you want one, some people do it would seem

 

Indeed they do, and if you find the culprit tell them it is causing the inconvenience they intended – or just give them what they deserve.

 

No idea how it comes off, but I took a photo whilst looking for the source of the oil leak on ours.

Click for larger image:

 

That's the that's the puppy. The puller I bought bolts to the three holes and then the centre puller bolt pushes on the head of the hub mounting bolt (which you loosen a bit first so there is a bit of space for the hub to come off a little). Comes off really nicely.

 

Quite so. I had to buy a thread cleaning tap after I mashed the first couple of turns.