Re: Fuel Pump
Posted by John Payne On 2012/5/11 2:46:55
G'day Men, time for an update on this project. This is the second time I've written this post - the first one disappeared into the ether as I'd forgotten to log on before hitting the submit button. I'll learn eventually!
Anyway, this project's taken awhile and a large chunk of the time was taken up with locating a fuel pump kit and receiving it downunder. The time was added to when one of the components in the kit was the wrong size. If you look at the smiley face bowl gasket membrane in the pic, it's eyes are too close together. A correct one was sent out, although it's OD was about 1/8" too large and needed trimming.
Removing and disassembly of the pump went pretty smoothly, apart from a couple of tight screws between the pump body and valve housing, but more about that later. Strangely, I found one of the inlet valve seal plates floating around inside - how or when it got out of its cage I don't know but I'm pretty sure it wouldn't help in getting fuel to the carby. Instead of the cages, the kit uses brake rivets to retain new seal plates and springs, and they are staked on the other side so hopefully won't move.
Reassembly went OK until it was time to mate the the valve housing and pump body. Two of the eight screws (probably the tight ones) were stripped on the ends and had some diecast attached. Troubling indeed and how to make sure the two halves stayed sealed. My conservative belt and braces approach to life came to the fore and I bought a set of longer screws, together with spring and flat washers and nuts, all in stainless steel, and fitted them. A purist might take offense but I think it looks OK and the pump certainly doesn't leak (see pic).
The flexible fuel line to the pump was feeling a little firm and I thought it better to replace it. I've ordered a new one from Niagara Packards, who make them as a project using materials for modern fuels, and they sell them for US $20 each, plus postage. Mine will be fitted once it arrives and the old one will have to handle the job in the meantime.
Finally, how did it all go? Well, after getting fuel up to the carby she started and idled in the shed normally. However, I was a little perplexed about one thing and someone with more experience about these things might be able to put my mind at rest. The glass fuel filter bowl on the carby doesn't get past the 2/3 full level, although it might at higher revs out on the road. It was like this before and I put that down to inadequate fuel pressure (???). I haven't taken her out for a drive yet but will soon. Regards, John
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Anyway, this project's taken awhile and a large chunk of the time was taken up with locating a fuel pump kit and receiving it downunder. The time was added to when one of the components in the kit was the wrong size. If you look at the smiley face bowl gasket membrane in the pic, it's eyes are too close together. A correct one was sent out, although it's OD was about 1/8" too large and needed trimming.
Removing and disassembly of the pump went pretty smoothly, apart from a couple of tight screws between the pump body and valve housing, but more about that later. Strangely, I found one of the inlet valve seal plates floating around inside - how or when it got out of its cage I don't know but I'm pretty sure it wouldn't help in getting fuel to the carby. Instead of the cages, the kit uses brake rivets to retain new seal plates and springs, and they are staked on the other side so hopefully won't move.
Reassembly went OK until it was time to mate the the valve housing and pump body. Two of the eight screws (probably the tight ones) were stripped on the ends and had some diecast attached. Troubling indeed and how to make sure the two halves stayed sealed. My conservative belt and braces approach to life came to the fore and I bought a set of longer screws, together with spring and flat washers and nuts, all in stainless steel, and fitted them. A purist might take offense but I think it looks OK and the pump certainly doesn't leak (see pic).
The flexible fuel line to the pump was feeling a little firm and I thought it better to replace it. I've ordered a new one from Niagara Packards, who make them as a project using materials for modern fuels, and they sell them for US $20 each, plus postage. Mine will be fitted once it arrives and the old one will have to handle the job in the meantime.
Finally, how did it all go? Well, after getting fuel up to the carby she started and idled in the shed normally. However, I was a little perplexed about one thing and someone with more experience about these things might be able to put my mind at rest. The glass fuel filter bowl on the carby doesn't get past the 2/3 full level, although it might at higher revs out on the road. It was like this before and I put that down to inadequate fuel pressure (???). I haven't taken her out for a drive yet but will soon. Regards, John
Attach file:
(130.42 KB)
(66.88 KB)
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