Quote:
Originally Posted by ckamila
Army - I know you're not covering the modulator pressure adjustments but what about the other two forms of pressure, regulating and working, how are they adjusted or measured?
Great write up!!!
Thanks,
Chris
|
The names for each type of pressure seem to change depending on which book you are reading. The 722.3 ATSG manual talks about regulating pressure but the 722.1 ATSG manual does not.
To be honest I'm still scratching my head on all of this stuff at the moment. I'm slowly collecting as much information as I can though. I plan on doing a second thread on how I fitted and adjusted the sodding thing...
The 722.1 ATSG manual calls the pressure that gets adjusted by the throttle linkage (what I was talking about in the last post I made) the control pressure - but later on in the book they say it acts on the modulating pressure (which is why I called it that) and that it ignores the governor pressure...
All in all the only pressure that you can adjust (as a normal person anyway) on a 722.118 vacuum only transmission is the modulating pressure via the vacuum dashpot (and that bloody valve on the top of the engine).
On the 722.118 pre-1980 (ish?) no vacuum set up that does have the throttle linkage rod you apparently turn a screw for the modulating pressure where the vacuum dashpot would be on the later models (see link given at the beginning of the thread for more information about the early 722.118s) and then you've got the control pressure (= modulating pressure) again.
On most of the petrol engined fitted transmissions you've got modulating pressure done in two ways => vacuum dashpot and via the throttle linkage connection (as explained above also called control pressure).
Deep breath!
As for any other pressure on the 722.0XX / 722.1XX - what ever it is - what ever it is called - it can't be changed by mere mortals. It can't be adjusted. If the working pressure isn't high enough then the front pump is worn and that's it (for that pump anyway)
I'll make a picture tomorrow of the position of the test port positions.