having some issues with our bobcat. we had to have the motor changed due to someone putting dirt in the motor on a job site, and once we got it back we have had a couple problems where the skidded will lift and tilt and won't move forward or back. occasionally we can bounce it around and it will start workin again, but yesterday it left us dead in the water. any help would be greatly appreciated its a 2017 t870 Code No drivers communication Only loader works I can bounce around with loader and it has went off in the past Now it goes from No driver communication Low DEF Driver door open
bobcat t870 won't move forward or back but will lift and tilt
- Thread starter gsvar2004
- Start date
flyerdan
Well-known member
- Joined
- Mar 7, 2009
- Messages
- 983
First impression would be an intermittent ground to the chassis; I would imagine that the negative battery cable connects to the engine, and chassis ground is subsequent from that. Possibly when they swapped mills they neglected to connect the smaller cable connecting the two, or it wasn't cleaned or tightened properly.
I would use a jumper cable from the neg battery to a clean chassis point and see if the problems go away. If so, find the culprit and fix it or add your own ground. I like using the woven strap for grounds, it's more flexible.
I would use a jumper cable from the neg battery to a clean chassis point and see if the problems go away. If so, find the culprit and fix it or add your own ground. I like using the woven strap for grounds, it's more flexible.
We ha e 3 codes. M7504 M6303 M3128 We checked the grounds that was all good. We had a coole or cut wires on the left side of the lift arms that we spliced but that wasn't it.
walio123
Well-known member
- Joined
- Dec 9, 2013
- Messages
- 367
M3128 Interrupted Power Failure M6403 Switched Power Relay Error M7504 Drive Controller No Communication Check the fuses and the relay, on the fuses cover is usually a drawn circuit, you will know exactly which fuse and which relay is for Switched Power.Also check the drive and main controller connectors, whether they are installed correctly and are clean, water / mud may have fallen into them. Be careful, the pins are too thin and if the connector is incorrectly attached, you may have bend/ twist some pin/pins. There may be a broken wire in this circuit.
