Throttle adjustment?

[Gamagoat1]

The nifty Roto chamber

 

[WillWagner]

That is a variable speed governer. The upper part is used for the rear throttle, the bottom is the automotive one..the one you drive it with. If the upper lever isn't locked in the front or rearward position, depending on how it's configured, the two governers fight each other. It limits RPM in both modes, the idle will fluctuate, the auto throttle can be touchy, you'll have low power. Also, as the pump pressure increases when using the auto throttle, it can force the upper throttle lever off of it's stop and cause the same symptoms mentioned above. If you aren't using the upstairs throttle, use some strong wire and tie it in the fully closed position. Or, see the circled bracket on the rear of the pump? It is used to keep the upper throttle lever locked in the closed position so the pump pressure can't move the upper throttle and cause the above issues.
HTH, Will

 

[Gamagoat1]

Will,
You're a genius. I've wondered what that bracket was for, and my 816 displays the exact symptoms.
Thank you!

 

[DaveP]

Will, the pics above of my pump shows the upper gov with the spring pulling the lever forward. should i secure it that direction or to the rear?

 

[jatonka]

No sweat, Dave, keep posting, I'm reading all of them. This wrecker thing is a lot more than just pulling levers, I've been an excavating contractor since 1974 and I have learned a lot from older guys over the years, now I'm older and I know a lot, but I sure can learn a lot more and still not know it all. I love this wrecker, it pulls like I can't hardly believe. Merry Christmas to all. John T