Geoff Weeks

The two tanks should be T'ed off of the wet tank. So a stuck check on the inlet (not likely) or a leak at the the brake treadle valve or other part of the primary system. Plug off the outlet of the primary and see if it builds.

It would seam that way if Dynatard heads had recessed valve seats and regular did not, trying to gain a little room between the valves and piston,

Not at all, new engines do just that, but cutting fuel does nothing to retard. when you hand crank an engine on compression, then past TDC, the engine kicks even if it never fires. By opening the exh valve just before TDC you get all the compression effort but dump the "kick" after TDC. The kick is caused by the pressure you built up moving the piston up now acting to push it down. by dumping the pressure, there is nothing to push the piston back down.

Jake on a Cummins, is operated (opening trigger) off the injector push rod, which is about 19 deg BTDC (yes it changes from model to model). If you open before compression, then you get no or very little resistance It is the compression that provides all the retarding effort, by opening the exh right before or at the injection time, there is no or little ignition and by holding the exhaust off the seat, there is no power returned to the crank like there would be if the valve stayed closed, after the piston passes TDC. Opening before compression, you have no compression, and little to no resistance to revolution in the crank.

I disagree with this statement, it holds the exhaust valve open just before power stroke, it allows for compression but not power.

I have successful bought from them in the past, but prices are high, and would not be my 1st "go to" place, They do seam to have some of the more "odd ball" parts.

here it is: https://www.partdeal.com/cole-hersee-dp-2-circuit-marker-lamp-switch-12vdc-dpdt-boxed-55071.html?srsltid=AfmBOoq--qdZhGYxWZBGhDjNAzT-eQJHLlTIeyEScZC1kPGRy-FOz2bH edit: Not finding any in stock, so may be hard to find and N.O.S. being the only option.

Somewhere I have a Cole Hersee book that has the switch and the wiring for that. IIRC it had 3 positions, center was off. Found it! (not in current Cole Hersee catalog) Sw number 55071 Had 3 terminals on the rear, Battery, Marker light feed, and common out to the marker lights. Flashed on for daylight, off for night time, by moveing the switch in opposite directions, spring loaded to center (normal) position. Cole Hersee's version worked with lights on or off.

I'll add mine with the caveat that I have never driven with one. The design, in theory is a sound one, use a purpose designed "lump" on a cam to open the exh valve at the right time to"dump"compression. Cummins touted this with the release of the ISX. Problems abound with execution. How much lift can you have at TDC? how much mfg tolerance can the design have and still function well? How much "extra"weight can the rocker system take and not float at high speed" How well with the oiling system meet the demands that the system requires? I can see all the potential of the design, but have no experience with the execution.

I don't know, if I'm not careful Paul may make the trip to put a lump on the side of my head!😄

That doesn't make it murder, nor does it absolve her actions. It is lucky she was the only one.

Not what you said, tho

Aslhi died because she made a stupid choice. She forced entry in to restricted area, as an ex military person she should have known that it might be met with lethal force. Same if she tried to force entry to the White House, a military installation, or even a restricted section of an airport! I sorry she died, but it was her actions. The fact that more weren't shot has much more to due with the lack of manpower and equipment than any legal restraint. I am more concerned about people shot by police in their beds during "No Knock" entry. Breyana Taylor was killed in her apt, a sleep without anything happening to those that killed her. Yes, her boyfriend opened fire on what he thought (do to no advance warning they were police) was a home invasion. Ashli was forcing entry to a restricted area, what happen can easily be anticipated. The fact that you sympathize with her political views doesn't change the fact that her actions were what cause the response.

I think he was talking cam (valve cam) timing.

Don't want you coming over and giving me a lump upside the head!