Vacuum operated pull push gear
Hello, I am curious as to how the vacuum operated pull push gear works. I have added PP gear to three of my Jintys and a Coal tank including the extra vacuum bags. When adding these I wondered just how the system works. I can understand the braking application, similar I suspect to the valve in a guards brake van. But just how did the driver in the drive trailer work the regulator on the locomotive footplate? Also, I believe the Jintys were right hand drive and guess that the PP gear was added t
The Midland Railway Study Centre holds a copy of the 1946 "Instructions respecting the working of rail motors and motor trains" (Item No. 77-11931) and Summerson reproduces the title page of the 1935 version; from snowy1051's photos, the Midland system of 1908 seems to have remained the LMS standard system..
Nearholmer, one thing I don't understand in your deduction of how the system worked is the suggestion that with the locomotive's mechanical regulator open, the vacuum-controlled