Was just wondering how everyone primes with there 39? And what stroke setting works the best. When I primed with it the other day. I used water and A framed the boom at max rpm at about half stroke. 

Another question...how do people water wash with there 39? Haven't done it yet but if I were to I would a frame boom, put on half stroke, either counting my strokes or watching for water put it into reverse full stroke volume...would love as much advice I can get with this truck. 

i prime at 3/4 volume 3/4 throttle with all the booms i run. Your routine shouldnt change just because the size of the boom does :)

Isn't it true though that you are suppose to and run the pump a full rpm/throttle and adjust your stroke accordingly?

You can have problems by priming with to much water, I prime @1200 rpm (which I pump at) and strokes on 4. As far as waterwashing, stick with the ball!!!! 

on the big booms you need to run the booms at max throttle or the truck will stall but on smaller booms you can run at whatever RPM you want basically. I usually run the 34 at 1200-1300RPM while pumping, adjusting the volume as needed

priming has nothing to do with the size  of the boom or rpm. on a putz half rpm half vol. on schwing u will need more rpm and more vol. it has to do with kind of concrete your state u pump in. in florida coral rock mud is harder to prime and pump.in iowa concrete here in sweet .its like river rock blend mix . i prime with one gallon of water.never a problem. its all on the type of concrete your pumping  water wash if u want to but i would use a ball. good luck pumping brother and nice pump.

many of my operators use two 5" sponges. suck one back a stroke or two then tip some water in the last bend and then another sponge. then suck back. not too many problems with that method and cleans the pipeline nicely...

we have a 39m sching just like yours i have always primed at 1200 at about 2.5 on the dial. I have pumped at 1000rpm on .5 to zero when doing basement floors depending on how the placing crew is. we used a 5 inche medium to hard ball with a 8 inche foam bollister about 12 inches long behind i put ball first the the other sponge and never had to many  problems unless you don't keep rubbers clean on your transition door. i Love the 39m until we got a 41m but it is still an awesome pump to run and easy to figure out when issues arrise.

 Priming is about the same with any pump. As far as washing ai dont care what you do but I have been water washing for 33 years, Oh but I can suck a sponge to, so I have 2 options. Empty the hopper, turn aggator off, fill hopper to 2" below top of rubber, take 7 strokes forward 1500 RPM stroke control below half, bring water back same speed, then 4 srokes forward, and 4 back to clean any residue in deck, and you should be good. WARNING anything can go wrong so when you have a problem what you do next makes you a better operator. Good luck if you have any other questions just ask.

I put it about 1200-1500 rpms on lowest stroke with some water ahead and behind a soft orange ball