I also run a 36z. I have been having alot of problems with surge in the concrete flow. I have tried varying throttle and pump speed and volume. This does not seem to help. Does anyone have any suggestions. The pump has 11" material cylinders. It is 1 2006 model only been in service since August.

Thanks

Russ

That 250yph bad boy can not be contained by anyone's 36m boom. I don't care who made it. In certain configurations it is going to bounce. It may sound strange but the 36m guys tell me that sometimes they need to speed it up to stop the bounce; and sometimes nothing works. Have you tried to make a pour 1-2 up 3-4 down? I don't doubt that you are doing this but check your 'light side' outriggers and make sure they are tight. They are a very important part of total stability. Also the slump of the concrete seems to play a big part. What are you seeing (specifiically)

That is what I was gonna ask also. When I pump in a z, at certian configs it bounces and gets a little rough. As the pour progress and you change the boom at times it is smooth as silk. I use a Con forms 5-3 reducing hose 95% of the time and really notice boom surge with dryer slumps in any config. Mr. Mike

That dry crete is the problem. At a certain speed (rate of pour) it seems to develop a rhythm that is in tune with the boom. That might sound retarded??? The valve shift speed does not seem to take out the bounce either. Operating as a R&F for part of the pour seems to be the only sure way to cure it for a while.

In ATL when the residential guys do slabs they make a pass and fill the footers with dry mud. This is when the bounce is evident. The final pass on the slab its self is usually wetter and the problem usually goes away................ except when the light side outriggers are not tight.

I have noticed that that the z mode is more stable when closer into the truck and when I go for long reaches I A frame it. Its a little easier to bring back to you using the main and tip section. I thought it might be the monster pump kit that was causing some of the bounce. Also it does bounce more with lower slump. Bob, good points but you were right i do do that already. Its important for this pump to keep the wheels on the ground. The pump kit make the pump rock from back to front(much more then most pumps). Sometimes I am afraid it will bend the frame when I have a couple of wheels off the ground. Thanks for the insight.

Russ

When a pump is set up it should be as near to level as possible.I do not understand the reasoning behind keeping the wheels on the ground.Please explain.Pumps are set up every day with the front bumper at chin height.Of course abiding by a companies rules should be relativly high on ones priority list.

I think they're talking about the rear wheels. The brakes on the front are not part of the parking brake (maxi) having the rear wheels off the ground will let the truck move back and forth especially when booming over the front or rear of the truck. Another problem with surge is squeezing it down to 3". The more you reduce the more pressure the more bounce. Just because you have a big pump kit doesn't make it bounce. With a 5-3" hose I can bet your not pumping any faster than a .16 or even a .12L is capable of pumping.

here is something you guys should no on a newer putz when the pump shifts it goes w.o. just for a sec. should be about 4 in.on dif cyl now this can be ajusted on your cards witch will take alot of the boom bounce out

We love that 260yhr pump kit, but i do not think that  boom on the 36 can handle that kind of volume, its overkill.