Cat excavator wiring?

[anuradha]

Did you check the voltage according to the below process ?

"Governor back up switch at the manual position or when these 2 wires are open in circuit, During acceleration from the speed change dial knob voltage between these 2 wires should be 15 - 30 volts.During deceleration -15-(-30 )
Volts. When starionary 0 V." During this test key switch should be at the on position.

 

[drew good]

Did you check the voltage according to the below process ?

"Governor back up switch at the manual position or when these 2 wires are open in circuit, During acceleration from the speed change dial knob voltage between these 2 wires should be 15 - 30 volts.During deceleration -15-(-30 )
Volts. When starionary 0 V." During this test key switch should be at the on position.[/QUOTE
just checked it the most I was getting was 5 volts when it was accelerating or the accelerating

 

[anuradha]

I think you should follow the PRV troubleshooting procedure also to see that what will be the result on that particular issue as well.

 

[drew good]

I think you should follow the PRV troubleshooting procedure also to see that what will be the result on that particular issue as well.[/QUOTE
I started to follow the procedure starting with the valve itself. It tested good. Then instead of taking the left armrest apart I went right to the connection at the controller. I unplugged it and on pins 8 and 9 it was open no shorts to ground . No shorts to any of the other pins on that connector besides pin 8 went to pin 28 when I moved the back switch for the pump. Looks like a controller problem. Has anyone tore into one of these? Controller Part number 4i-5383 . Google didn't come up with any.