Some years back we rented a 310 Backhoe. It worked great for what we were doing but like most rental units they were holding us to the 8 hours of use per day for a weekend rental - keep in mind that here in Florida the days are much longer then 8 hrs.
While using the machine it stopped moving forward/reverse. We checked the fluid level and it appeared it was low - quite a bit low - it needed nearly a full bucket to bring it up. We got some fluid and topped it off - didn't help.
We called the rental place and told them about the problem and they said it would be Monday before they could send someone out.
We kept looking at the machine and found a wire underneath that looked like it was hanging ... when we followed it, it was unplugged. When I plugged it in, the 310 worked just fine.
We called the rental place and they were so happy we fixed the problem and topped off the low fluid they lifted the 8 hr time limit and let us have an extra day with the 310.