Great news! The excavator is up and running better than ever!
I contacted RC4wd requesting some help with how to set up the 4th valve. ( thanks Ralph for asking the question )
They gave me Martin's number. Known on YouTube as diggin with Martin.
In a matter of minutes I realized I met and spoke to him at Indy 2012
Had a great talk and in no time had the hoe running great.
I was running this thing all wrong up till now
I ran the pump from 80-95%.
Now with the 4th valve, or " metering valve" I like to call it, running properly my pump speed is set at 25% !
No more high temps , battery life is up by 30 minutes. I got about 1hr 20 minutes run time
Channel 8 runs the metering valve and is controlled by the dial above the left stick. It is a fixed setting and does not move during functions. The pump puts out way more than the valve can handle at full flow which generates a lot of heat and motor works hard. The dial allows you to use only the amount you need to run properly and the rest goes through the 4th valve straight back to tank.
Still got all the speed and power I had before but much easier on the system.
I'm a happy camper!
http://youtu.be/3IciGMo5GyM