mblaney
Full Access Member
I have been borrowing some equipment from work to pop my injectors (pump and precision gauge - see http://www.oilburners.net/forums/showthread.php?63111-Best-homemade-pop-tester-Ever ) so I figured I might as well make my own pump and either use a ***** gauge or borrow the digital one from work.
I bought a ***** 2 ton hydraulic jack and modified it. I replaced the jack piston with a brass plug rather than weld an NPT fitting to the cylinder cap...
Crappy jack for $16
The top of the jack cylinder has a very small vent hole to prevent over extension of the jack piston. Silver solder fixed that up.
Lathe time. Brass plug with NPT thread and o-ring seal to fit the cylinder bore.
This is how the brass plug fits; the cylinder / reservoir cap will hold it in place. Two advantages of using the plug instead of welding an npt to the cap are, you can rotate the pressure assembly to any position, and the plug with o-ring puts less stress on the cap due to reduced surface area.
Bath time! Twenty minutes in the ultrasonic bath will clean everything up.
Parts drying.
Plug installed (note: this pic is out of order... this was a test fit before I tapped the NPT, for those with a sharp eye).
And the rest of the fittings. The pressure gauge connection port is a Rawlston fitting; it is an NPT but uses an o-ring face seal. This allows you to switch between gauges, etc but does not use teflon or other thread sealer.
It works! The gauge I am using is borrowed from work; it is very accurate (0.1% of reading) and has peak hold
Thanks for looking!
I bought a ***** 2 ton hydraulic jack and modified it. I replaced the jack piston with a brass plug rather than weld an NPT fitting to the cylinder cap...
Crappy jack for $16
You must be registered for see images attach
The top of the jack cylinder has a very small vent hole to prevent over extension of the jack piston. Silver solder fixed that up.
You must be registered for see images attach
Lathe time. Brass plug with NPT thread and o-ring seal to fit the cylinder bore.
You must be registered for see images attach
You must be registered for see images attach
This is how the brass plug fits; the cylinder / reservoir cap will hold it in place. Two advantages of using the plug instead of welding an npt to the cap are, you can rotate the pressure assembly to any position, and the plug with o-ring puts less stress on the cap due to reduced surface area.
You must be registered for see images attach
Bath time! Twenty minutes in the ultrasonic bath will clean everything up.
You must be registered for see images attach
Parts drying.
You must be registered for see images attach
Plug installed (note: this pic is out of order... this was a test fit before I tapped the NPT, for those with a sharp eye).
You must be registered for see images attach
And the rest of the fittings. The pressure gauge connection port is a Rawlston fitting; it is an NPT but uses an o-ring face seal. This allows you to switch between gauges, etc but does not use teflon or other thread sealer.
You must be registered for see images attach
It works! The gauge I am using is borrowed from work; it is very accurate (0.1% of reading) and has peak hold
You must be registered for see images attach
Thanks for looking!