Marshall,
I degreased the components for both smog pumps and found the following in both. It is a hard smooth layer and I would be concerned that any type of bead blasting might remove it. Did you see this in your smog pump? Guess I'll leave the inside degreased and install my bearings tomorrow. I should have both units finished and one installed in the 40. It will be nice to get behind the wheel again.
Yes both mine had that film. I stayed away from it with the bead blaster.
Going to buff the inside with jeweler rouge to a mirror finish. I don't think the vanes even hit this surface since there was grease blobs left on the surface.
I think I might have found an easier source for the carbon seals. Stay tuned.
Rebuilt pumps are listed at Rockauto.com for only $88.79 with no core charge. A-1 CARDONE Part # 33779. It may not be original, but probably it'll work to get you through a smog check station.
Not really neading it for a smog check. Need it so it looks right.
I've been hesitant about a reman unit based on the fact I have yet to see one that had the vane seals replaced. FInd me one that I can swap the rear hose outlets for and I will buy it.
Yes both mine had that film. I stayed away from it with the bead blaster.
Going to buff the inside with jeweler rouge to a mirror finish. I don't think the vanes even hit this surface since there was grease blobs left on the surface.
I think I might have found an easier source for the carbon seals. Stay tuned.
The vanes don't touch that spot. The cylinder does to some degree, the vane is fully retracted at that spot in rotation. I would certainly like to get new carbon wipers for one of my pumps. The wipers that are in the other pump are in great shape and still seal against the vanes. Let me know what you come up with for wipers. If the price is right, I would be willing to buy a number of spare sets.
Well, I put the smog pump in the best shape together and it is oh so quite. I will say that figuring out the hardware to use to press the vane bearings in took a trip to ACE. I ended up using 3 bronze bushings, a grade 8 1/4" bolt and a 9/16" socket. The setup worked very well with my bench vise. I was able to do all the bearing removal and installation with a 6" bench vise.
Not so good on my side. Got the material in for the vane seals. I think it's too soft. Basically what I bought was a block of graphite. Granted I think it would work I don't think it's a direct replacement.
The link to the other supplier above. They asked for drawings and tolerances. Something I'm not willing to do. I will probably just buck up and buy a block from them and see if it would work.
I thought the Factory Emmisons Manuals had specs on the minimum thickness and taper of the carbon seal peices. I think there may also be spec on the vanes. That would give a good starting point on reproducing them from bulk stock.
I have a 73 Emmisions manual. Used it when I tore down my 60 series pump. Specs seemed similar. My 60 pump was really clean inside for a the stock pump at 175,000 miles. Worst wear was not that the carbon was really wore down, but just scored and grooved, as was the vanes. Probably one reason they stop to function at top performance. I didn't have the means at the time to pull the front bearing. All I did was lube up what I could, clean it out real well and stick it back on. Still working fine, but I don't have smog testing and couldn't tell you if it was really putting out enough air. It will make suction though if you hold the hose to skin.
Afterthought, some of the smog pumps we replaced through the years on my dads Fords seemed very similar to Toyota pumps. Not identical but very similar, which makes sense. Perhaps parts could be taken from them. I never tore any down though to see what the guts looked like. These were mid 80's vintage Bronco and F-250, I-6 and v-8 460. The 460 actually had two pumps for each cylinder bank. We stripped them a few years ago after they kept failing.
I couldn't find a good economical source for the vain seals so I just robbed the larger ones from another pump I had.
Installed new main bearings and decided the vain bearings after cleaning them up looked very good. So I reused them. All bearings were packed with a high temp grease. I decided to also spray all the internal surfaces with a graphite spray I picked up from NAPA. Looks like it will work well and hopefully extend the life a little longer. Slapped it all back together.
Here are a few photos of the pump assembly with the pulley removed. You can see the bearing held in place by a snap ring behind the pulley retainer but I can't figure out how to get the retainer off to access the bearing. It's not like the pre '80 pumps that have reverse threads with a keyway.
Whats the back side look like? It looks to me like theres some way to retain the shaft/hub in the bearing from the backside, press the shaft/hub out of the bearing, then remove c-clip and remove bearing.
Whats the back side look like? It looks to me like theres some way to retain the shaft/hub in the bearing from the backside, press the shaft/hub out of the bearing, then remove c-clip and remove bearing.
