Home built compression tester

[Muir hill 101]

Cost me 52$ had the pencil injector which had a bad fitting .

 

[rlp in Co.]

So how did you make it? Drill out the old injector? I need one to test my 550 Ford backhoe! I wonder if one can be rented?

 

[Muir hill 101]

I had a bad injector to make the adapter . I had to cut the original fitting off the injector then I cut a swivel hydraulic fitting in half drilled it out then pushed it on the old injector welded it in place then I took the guts out of the injector and cut the tip off the injector . Then a hydraulic hose a liquid filled gauge and fitting to put it all together. I dont know if you could find a compression tester to rent or not ? I figured this would be cheaper than the cheap sets that didnt have the right adapter so I made my own

 

[wore out]

What did you use for a check valve, there needs to be one at the adapter end of the hose for accurate measurements, IMHO.

Were you able to repurpose the injector pintle, possibly?

https://www.toolsource.com/injector...ase-caterpillar-john-deere-wauk-p-121085.html

The adapter at the link above is reasonably priced and will fir the quick-coupler on some common compression testers.

 

[rlp in Co.]

Thanks, I might have to do the same thing. I wish I had an old injector.

 

[rustred]

Thats a half Azzed one as u will only get one puff on the gauge,u have no check valve to hold the pressure for each puff.

 

[Muir hill 101]

Hadnt thought of that yet now back to the drawing board

 

[Muir hill 101]

I hadnt considered the need for check valve dang it .

 

[Muir hill 101]

So all isnt lost looks like the fine folks at McMaster carr have a check valve

 

[rustred]

perfect.

 

[rustred]

i got to looking at that one and done see any way to release the pressure . might have to add in your own valve.

 

[Dieseltech]

Number one, it needs a Shrader valve. Number two, the nut end needs sealed off/welded shut.

 

[Muir hill 101]

I was wondering about the top being welded as well

 

[Dieseltech]

I have some old pencil injectors, how many do you want? lol

 

[Muir hill 101]

do have release valve built in just no check valve .

 

[Muir hill 101]

Would you have an injector for a 2715e ford diesel

 

[Dieseltech]

Dont think so, need to know what injector body number are and Ill look.

 

[rustred]

that is a check valve with no release valve.
as i said you need to add the release valve to bleed the pressure off after each test.

 

[rlp in Co.]

I need one for a 550 Ford backhoe. I was going to go to the fuel injection shop in Greeley to see if they had an old one. The engine misses on one cylinder till it gets warmed up.

 

[Muir hill 101]

I have a release valve I just need a check valve