Bobcat 720 Hydraulic/Drive Problem

[Bama720JO]

Hello everyone I have a bobcat 720 skid steer with an Isuzu D201 2.2 4 cylinder diesel engine. I've only ran the machine for a very short time since I've got the engine back going now I'm having problems somewhere in the hydraulic system I believe. my first test run with the machine after around five minutes I lost movement completely but lift and bucket functions still worked after letting it sit for a bit it would do same thing. I changed hydraulic fluid and both filters, after refilling with fluid I thought I had it fixed. That evening I ran machine pushing dirt for around 1 hour, it ran and functioned well. I parked the machine back on level ground that evening the next morning I jumped on it to move only about 30' and lost all movement as well as lift and bucket functions. If anyone could help with any information I would be grateful. Thank you all for the wealth of knowledge that is on this forum.

 

[emilyjohnson85]

Sounds like you're dealing with a hydraulic issue, possibly related to the charge pump or a failing hydraulic pump. If the machine works for a bit and then loses all movement, it might be overheating or losing pressure. Check if the hydraulic fluid is overheating and ensure all connections and lines are secure and free from leaks. Also, inspect the charge pump to ensure it's functioning properly, as it could be losing pressure after running for a while.