I had in mind to buy a dual action fuel pump to drive my vacuum wiper motor. I found part numbers for them, and then found them listed many places on the internet. But, everywhere I looked they were out of stock. This leads me to believe that the demand for them has dropped off so much that they've probably quit making them. Can one of you guys point me to someplace where I can buy one.
Mike Burns 1940 Chev 1/2 ton 1953 Chev 1/2 ton 1950 Studebaker Starlight Coupe 1947 Indian Chief 1943 Indian 741
You should be aware that a dual action pump is not a substitute for manifold vacuum- - - - -it's plumbed inline between the intake manifold and the wiper motor to assist, not substitute for intake vacuum. The pump takes over and keeps the wipers running- - - -sort of- - - -when you open the throttle to pass or climb a hill, and the vacuum in the manifold virtually goes away. About the only thing you'll be able to find these days will be a 3rd. world "rebuilt" unit- - - -new ones haven't been made in a couple of decades, at least. The reason they're so scarce is a lack of rebuildable cores. Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt! There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway Love your enemies and drive 'em nuts!
1.) Regardless of the comments of injected restorative liquids like diesel oil, brake fluid or moonshine, to make the old vacuum motor work, send your Trico motor to Ficken Wiper Service (www.wiperman.com). This will solve the internal vacuum leakage and get you back to square one.
2.) A quote from a VCCA member (Junkyard Dog), "I have installed about three new dual action fuel pumps on my car (since 1960) and all three were the same.....almost no wipers going up hill. With normal driving, the wipers do work better with a dual action fuel pump than with a single action pump, but going up hill is another story."
Used dual action fuel pumps can still be found and they can be rebuilt, with new hand made kits, to handle modern Ethanol gasoline. The vacuum section can be rebuilt but new (not NOS) kits can be hard to find and are limited to a few AC models (No Carter fuel pumps). Progression: AC 9126 replaced by AC 4138 replaced by AC 4666.
3.) The last add-on, period correct, solution was the Trico Electro-Vac. A little difficult to find today. It is an electric motor driven vacuum pump and reservoir that maintains vacuum level. The irony is, why add an electric motor when you can convert to electric wipers. On a side note, there has been discussions to make a DIY vacuum reservoir using a modern brake booster motor.
"Adding CFM to a truck will only help at engine speeds you don't want to use." "I found there was nothing to gain beyond 400 CFM."
Well, I just learned quite a bit about dual action pumps. I had always assumed that having a seperate vacuum pump solved all of the old issues. It's proof that your're never too old to learn. THANKS!! As an alernative to a dual action fuel pump, I had also thought that I'd just buy a 12 volt vacuum pump and use it instead of engine vacuum. I remember reading something about that here somewhere on here a while back.
Mike Burns 1940 Chev 1/2 ton 1953 Chev 1/2 ton 1950 Studebaker Starlight Coupe 1947 Indian Chief 1943 Indian 741
I bought a brand new AC/Delco dual action pump around 1970 thinking the same thing. As it turned out, it was a great incentive to convert to electric wipers and would have been a decent trot line weight if you had a trot line with only 3 or 4 hooks. Aside from that it was a waste of $ and as others have already said, it was not a solution to driving uphill at all. A couple of years ago I wrote a circuit for adding delay wipers to the AD that used the same switch knob. You end up with low speed, high speed and 4 different speeds of delay wipers. It is still around here somewhere and not difficult to do now that all the work has been done.
~ Jon 1952 1/2 ton with 1959 235 | T5 with 3.07 rear end
Your best way to improve the performance of vacuum powered wipers and other things like 2-speed rear axles, etc. is to install a reservoir tank. Buy a piece of 3" PVC drain pipe and a couple of caps, glue them together, and hide about 3 feet of it inside a frame rail under the cab. Put a rubber grommett and a one way check valve like a brake booster uses into one end cap, and install a screw-in barbed vacuum hose nipple beside it. Then when the vacuum drops, you'll have enough reserve to keep the wipers from stopping. It will also be MUCH less expensive than buying an electric pump. Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt! There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway Love your enemies and drive 'em nuts!
I bought a NOS vacuum/fuel pump a couple of years back. I don't know why I bought it. It seemed like a good idea at the time. I bought it on ebay and it wasn't enough money for me to remember the cost. It came in the original box I think. I have a 12 volt vacuum pump for my brakes because I have a blower. They can be pricey if you want one that doesn't sound like another engine. I think mine is a scroll type and requires no reservoir but I'll probably put one in anyway. I think it was a little over $500.
I found my vacuum/fuel pump. Turns out I put it on another 292 that I have never started. This is what mine looks like. I'm guessing it wouldn't fit a 235.
34 Years. Now with a '61 261, 848 head, Rochester Monojet carb, SM420 4-speed, 4.10 rear, dual reservoir MC, Bendix up front, 235/85R16 tires, 12-volt w/alternator, electric wipers and a modern radio in the glove box.
Mike Burns The other day a bolter said to get a diesel pickup vacuum pump that is electric. About 40$ If you look around you'll find the thread. He said with a good wiper mechanism will work !
1939 Packard Standard Eight Coupe (The Phantom) | 1956 Cadillac Coupe de Ville (The Bismarck) | 1964 Ford Galaxie 500 coupe |1966 Ford Mustang (Little Red) | 1969 Pontiac GTO (The Dishpit) I 1979 Ford F-100 | 1976 Ford F-150 (Big Red) | 1995 Ford F-150 (Newt)
I’ve too have been looking for a dual action fuel pump for my 54 235 engine (in a 49 3100). An impossible, ultimate find would be a dual action glass bowl fuel pump…
My question is, will any fuel pump from any year up to 1962/63 work on a 53/54/55/56/57/…
I see fuel pumps that are rebuildable on eBay but for later 50’s and early 60s 235’s and if one of these would work, I’d start looking for a rebuild kit… which also seems to be very rare these days.
Fuel pump rebuild kits are available from Then and Now Automotive. I believe they have them for the dual action pumps.
Kevin 1951 Chevy 3100 work truck Follow this saga in Project Journal Photos 1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car) Busting rust since the mid-60's If you're smart enough to take it apart, you darn well better be smart enough to put it back together.
I’ve too have been looking for a dual action fuel pump for my 54 235 engine (in a 49 3100). An impossible, ultimate find would be a dual action glass bowl fuel pump…
My question is, will any fuel pump from any year up to 1962/63 work on a 53/54/55/56/57/…
I see fuel pumps that are rebuildable on eBay but for later 50’s and early 60s 235’s and if one of these would work, I’d start looking for a rebuild kit… which also seems to be very rare these days.
Thanks all!
Fuel pumps from later years might fit but pump pressures might be too great on the newer pumps for more powerful engines.. I don't know, I'm just saying you should check out the specs first. Look up part numbers in a Chevy or GM Master parts book and see what's what.
1950 Chevrolet 3100 (Ol' Roy)
1939 Packard Standard Eight Coupe (The Phantom) | 1956 Cadillac Coupe de Ville (The Bismarck) | 1964 Ford Galaxie 500 coupe |1966 Ford Mustang (Little Red) | 1969 Pontiac GTO (The Dishpit) I 1979 Ford F-100 | 1976 Ford F-150 (Big Red) | 1995 Ford F-150 (Newt)
Hello, I’m just new to my ‘51 and the forum. It would appear that I have a dual action pump with glass top. As I currently do not haw I am going to address the windshield wipers I plan on bypassing the pump and blocking the intake manifold tap. Can I leave the fuel pump taps open or should I / can I cap these 2 fittings?
