Hello everyone, On my 1965 B40F, I'm doing away with the gas tap which was fitted just below the oil tank by a previous owner (he fitted it in order to cure a wet-sumping problem.) I've removed the tap and now need to remove the rubber tube, which is too short to use with the standard union nut etc which I'll be fitting. My problem is: I'm having trouble removing the rubber tube from the metal pipe underneath the engine. I've unscrewed the clip until it's very loose but can't get the rubber pipe to budge, and am afraid of pulling too hard on the rubber in case I put too much strain on the metal pipe. I've tried pushing the end of the rubber with a screwdriver blade, but it doesn't want to move. I thought about trying to cut it off somehow, but it's in a very confined space, and also I wouldn't want to damage the metal pipe. I was just wondering if anybody knew of a trick of the trade? Phil.
I would put a sharp knife through it, that tube is cheap as chips.
Phil
I posted on same matter here. The advice I had...which worked.. is that the section near the clip needs to be twisted to unstick it then it should be possible to pull the pipe off.
I carefully used some mole grips. Was a bit tricky to get hold of it as the pair I have are quite large.... but it worked. The more central return pipe was harder to get at to get a grip...so I ended up using a small flat head screw driver and pushing it between the rubber and metal pipe to break the seal. Then managed to twist free with the mole grips. Sounds like you may not be changing that one though.
Thanks, I'll try the mole grips and if that doesn't work I'll get a knife on it.
Also, I've been advised that when fitting the new rubber pipe, I should connect the oil tank end first, and then when I'm ready to fit the bottom end I should put some oil in the tank, keeping my finger over the bottom end to prevent spillage until the last moment when I stick it on the metal pipe (obviously there will be at least a little bit of spillage). The reason for this apparently is to prevent an air lock. Does anyone agree that this is the way to do it, or does anyone dispute it?
Phil.
It would do no harm, and it is possible to get an airlock between tank and pump. Had one on my A10 after replacing the feed pipe.
Update about rubber pipe removal, in case you're interested (unlikely, I know): couldn't get the mole grips on, Hoogerbooger, but the Stanley knife did the job - thanks, A10 JWO. Phil.
Quote from: Phil C on 04 May, 2018, 19:09
Thanks, I'll try the mole grips and if that doesn't work I'll get a knife on it.
Also, I've been advised that when fitting the new rubber pipe, I should connect the oil tank end first, and then when I'm ready to fit the bottom end I should put some oil in the tank, keeping my finger over the bottom end to prevent spillage until the last moment when I stick it on the metal pipe (obviously there will be at least a little bit of spillage). The reason for this apparently is to prevent an air lock. Does anyone agree that this is the way to do it, or does anyone dispute it?
Phil.
Never had an air lock with a BSA unit single - it's something people worry about but I don't think it's possible to get one with a gear driven pump unless you have a very strange pipe routing. I would connect the pipe dry and, when you first start the engine, just make sure you've got a good return to the tank after about 10s. It's hard enough getting the pipe on to the engine inlet pipe without trying to stop oil leaking out at the same time. ::)
Thanks AWJDThumper, but I didn't see your message until I'd done it. Anyway, it went okay, and oil returned to the tank straight away. A disappointment is that there appears to be a slight leak at each end of the new rubber pipe, even though I think the new clips are fully tightened. Any advice/suggestions please? Phil.
Might just be a bit of residual oil in the pipe just beyond where you fixed the clips, assuming it was full of oil when you pushed it home at both ends. As long as you've used the correct size of clips, there shouldn't be a problem.
Looking again, the clips are completely closed, so I guess they might be slightly too big. Might have to take the rubber pipe off again and fit slightly smaller clips. Phil.
I assume any kind of hose clip/jubilee clip will do? Phil.
The trouble with jubilee clips in smaller sizes is they crush the tube into a "D" shape. If the hose is the correct size for the fitting double wire clips do a good job of securing it
https://www.ebay.co.uk/itm/10-x-Mikalor-Double-Wire-Spring-Clips-Silicone-Hose-Pipe-Tube-Air-Fuel-Clamp-/262447979519?_trksid=p2385738.m4383.l4275.c10
I always use Jubilee clips but you have to use the correct size for the rubber pipe. I've even used them on a smaller diameter pipe than on the C15 without any problems.
Bit disappointing as they were supplied with the pipe, but I guess they must be slightly too big. Anyway, I'll replace them. Thanks everyone. Phil.
I've just replaced the clips on my new rubber oil feed pipe, and first impressions are that I might have cured the leaks at each end of the pipe. (The clips I had on before were too small a diameter.) So that's good. I notice however that the clip flange, upon which the screw head seats, is at quite an angle to the screw head (see photo attached.) (It's the same on the clip at the other end of the pipe.) Is that a problem at all? I thought I'd just check. Phil.
The problem with this type of mini clip is that they don't have a very big clamping range - normally only about 2mm. For these 5/16" oil pipes, I believe you need to use a 15mm mini clip, which probably means a 13-15mm clip. It might be worth checking what you have used but it's probably ok, if a little unsightly. I personally prefer Jubilee clips which look slight neater.
The ones I have used are 14 - 16mm. I think the o/d of the rubber tube is about 15mm. As long as they're not going to come loose, I'm happy. Phil.