any CAV injector pump experts here?

Tony in Mass.

Well-known Member
Bill gave me an idea, anybody on here ever take a CAV fuel injector pump appart? How much is space shuttle? How much is ox cart? If I have to take this to a diesel repair shop, with 2 weeks pay, it will be in a basket, after I try my hand in there... this is on a standard diesel, now rebuilt and waiting for fuel to rise up the final lines, but it doesn't leave the pump body.
 
Hello Tony,

Your pump act like this:

Either the pump shaft does not turn when the engine turns.
Or, the stop arm is in the stop position.
Or, the trottle arm is at the lowest idle position.

The 2 first conditions will cause the pump to pump absolutely nothing.
The 3rd condition will cause the pump to pump very very little.

The first condition can be checked with the pump in place, cranking the engine and with the little cover on the side of the pump open you can see if the shaft inside turns.

For the second and third condition you need to take the lid off.
Under the lid you will see some springs, and you must lift it up very carefully and not stretch them. Then make a drawing and point out in what holes the different springs are connected to.
So that you are able to put it back as it was.

Then, you need to find out if something is broken in the pump, that means the stop is in stop position but the arm is in the running position fooling you, or that the trottle arm is in the full position but internally it is in idle position.... for whatever reason.

Or that the pump piston is not pumping.

Before you open it, please clean it like a babybum... and disassemble it on a clean piece of paper. Cleaness with diesel systems are at outmost importance. A tiny piece of dust is enough to ruin it.

You also need to use compressed air to blow things clean, but at the same time, remember that if you blow on 2 assembled parts there is a chance you blow the dirt further into the system, rather than blow it away.
So, sometimes it is better to bring 2 connected parts apart, and then clean them and after that with some lubrication bring them together again.

Work slowly and use your brain wisely. Don't bring the last baseball game with you to the workbench, or an argument with someone.
When not worked with such a pump before, you need all your concentration. And don't let the pump irritate you. Look at it as a challenge. You are the boss, the pump is a tricky brat doing what it can to fool you. Don't let it.
That was todays psycology lesson. :)

Good luck, and don't be afraid to ask. I will go away for the weekend, but I will bring the puter with me, and a spare pump I have. But, it is not a pump for the engine you have, so I can only look at it for general questions.


Bill
 
Oh! good thinking Dave! Let Bill type 3 paragraghs, then say 'yes'. I must remember that. Bill and Dave. Already took the back off before work, spun well, nice and clean in there, did see a third bleeder screw- faces the block, hard to reach or see when installed, was hoping it wasn't that simple. Then came home a short time ago, grabbed my 65/165 I&T manual to help LJS out.... look at the cartoons... oh boy. As I said, this was a non running project when I bought it, putting it together best I know how, and now wonder if the last butcher misled me, or had a poor running engine... I think he/ some one in the past, crossed the lines from the filters. I now believe I have a pressure line from a return fitting, visa versa. If I knew how to spell 'schematic' I would ask for one.
 
It is a brave man that will attempt to take one of those apart with previous training. Have you ever seen a repair kit for one of those? a bag full of gaskets, o rings and washers of various sizes and materials.. If you do have a go I can give you one tip. Take your camera with you (cellphone or otherwise) and take LOTS of pictures as you dismantle the thing.
 
Sometimes Roy, like the 7th calvary or the 24th Welsh borders, it isn't bravery as much as... lack of options? There is nothing else to do here, if I broke it open or not, the price at the shop is the same. In my educated experienced eye... there is nothing wrong in there. I don't know what type of bronze or brass the banjo fitting is, but the lead solder, that seemed pretty solid, let go, so a brazing job is in order... Like the old saying, if you don't do it the first time try try try try try.............. beat ya to it. Enjoy the pics-btw, I have no idea how these Carling black labels keep getting the view of these frustrating endless maddening projects
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Go for it Tony. I did the one on my 65. Same deal, wouldnt push any fuel. Peaked in the top cover and the throttle shaft was stuck. Freed it up and still wouldn't pump anything

Bought a $30 seal kit and tore into it. Same deal at the injector shop, they didn't care if I tried as long as I didn't bust anything.

Turned out the pistons that actually pump the fuel to the injectors were stuck.

You can take that pump apart and reassemble without messing with the fuel settings. As stated previously, clean, clean, clean.

Mine runs like a champ, but you better believe I was ready with a gloved hand to choke the intake on the first start just in case she went crazy.

Here's a link to an online manual for the cav pump. Not exact, but should get you through it.

Jeff
Try this
 
forgot I had it, I can't even remember where it came from or when, but I had this page in my files, from JohnUK? Yes very detailed, and doesn't look like magic anymore. so the gov'nor is the spring in the turret on top I suppose. I didn't think I needed to get into the belly of it, but it might have the same piston issues as yours did. I am going to keep reinstalling it till I figure out the problem, gets easier and quicker every time huh? Tell me, If you turn it with your fingers, and pull the throttle back at the same time, is it suppose to get tougher? I was ready to give up on this lemon, now it is like -a hunt?
 
Wow. I haven't seen a black label commercial in decades.. they must make so much money around the world, they don't need to advertise in the states, where everyone likes bud flavored water. My favorite is the one with the sheepdog. I had one like that till someone stole him. I thought I was the only one left that drank it. still the best selling beer in the 3rd world.. makes me proud! In a few hours me and a carling will tackle the CAV again... once again into the breech...
 
they dont make cav pumps anymore, but I was told just yesterday there is a aftermarket pump they buid to replace the cav pumps. I can ask the guy when I see him next. Not sure what they would cost. Tony you gots lots of the loot so it doesnt matter :D
 
Shhhh. Don't go letting out any family secret cousin Lyle. Or I'll take you off my will. This pump of which you speak doesn't have a handle does it? A neighbor's uncle came by just a hour ago, he has all Ford stuff, he was telling me about a couple guys in town who do diesels and make house calls, we'll see how that goes. He had the same problem on a Fordson Major, he was told to take a syringe and prime the 4 lines from the top... he said it did the trick. I can't see that happening here. I will try that idea tomorrow anyway. running out of ideas. Now look cousin Lyle, this is a forum full of very sober normal people on here, so behave yourself. Or we will team up and help you sabatoge your... what is broke 1065? Now go post a normal massey question.
 
(quoted from post at 04:47:55 07/24/11)
(reply to post at 19:22:39 0any news7/09/11)
orry I have not seen the guy I had talked to about it. I also kinda forgot about it :oops: I spend lots of time in tractor tales, Just remind me Next week if I dont post anything about it before then...thanx
 
Is that guy me? Yeah, I am too busy and bored on here. Ya try to help someone, then have some lurker tell me how wrong I am according to the old brochure he found someplace. summer is to short to respond, and defend something I've done since the 70's, so yeah Lyle, I ain't on here lately, and I might just tear into the cav pump again myself, or not for a long time, don't mater, too much else to do. The rebuild kit is like 30 odd bucks...
 
(quoted from post at 17:55:48 07/24/11) Is that guy me? Yeah, I am too busy and bored on here. Ya try to help someone, then have some lurker tell me how wrong I am according to the old brochure he found someplace. summer is to short to respond, and defend something I've done since the 70's, so yeah Lyle, I ain't on here lately, and I might just tear into the cav pump again myself, or not for a long time, don't mater, too much else to do. The rebuild kit is like 30 odd bucks...
ou got nothing to loose by tearing into it. If you cant get it you can bring it to a shop later... me got faith in ya,you can do it
 
(quoted from post at 04:47:55 07/24/11)
(reply to post at 19:22:39 0any news7/09/11)
rom what I understand LUCS bought out CAV. I saw the guy this mornin and he said he just purchased a pump for his 1100 massey for around 800 bucks no core nessecary. Hope this helps :D
 

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