Recently installed a JD FL1061S flail mower on my 4310 diesel with 775 hours. After an hour of mowing tractor stops. No forward or reverse. I have a dual SCV which is routed through the Power Beyond port. Hydraulic fluid and the three filters were replaced. I installed an external oil pressure gauge and when i start out, pressure is 160 psi. Pressure will drop to 135 psi and not lower which is in John Deere specs. If I let the tractor run about 10-15 minutes with shuttle shift in forward or reverse and transmission in neutral, the tractor will start to move again. This issue really has me stumped. Tractor does not have provisions for an oil cooler. Hopefully someone can shed some light on this issue.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an alternative browser.
You should upgrade or use an alternative browser.
4310 Loss E-power reverser
- Thread starter Philo
- Start date
The fact that it works normally when cold, then loses both forward and reverse after about an hour, and comes back after cooling down makes me think this is more likely a heat-related hydraulic/control issue rather than a bad main pump.
Since you recently added the dual SCV through the Power Beyond port, I would start there. Double-check the Power Beyond plumbing and, if possible, temporarily return the tractor to the original hydraulic setup and see if the problem disappears. A restriction or incorrect connection may not show up until the oil gets hot.
I would also check the charge pressure while the tractor is actually not moving. The pressure when cold is less important than the pressure during the failure. If pressure stays normal when it refuses to move, the issue is likely in the forward/reverse clutch control circuit, valve, solenoids, or wiring rather than the pump.
I would not replace the hydraulic pump yet. The “works cold, fails hot, recovers after 10–15 minutes” symptom is the biggest clue here.
Since you recently added the dual SCV through the Power Beyond port, I would start there. Double-check the Power Beyond plumbing and, if possible, temporarily return the tractor to the original hydraulic setup and see if the problem disappears. A restriction or incorrect connection may not show up until the oil gets hot.
I would also check the charge pressure while the tractor is actually not moving. The pressure when cold is less important than the pressure during the failure. If pressure stays normal when it refuses to move, the issue is likely in the forward/reverse clutch control circuit, valve, solenoids, or wiring rather than the pump.
I would not replace the hydraulic pump yet. The “works cold, fails hot, recovers after 10–15 minutes” symptom is the biggest clue here.
Something else I'd be curious about when it quits moving: do the steering, 3-point and loader/SCV still act completely normal at that exact moment? If those are normal while forward/reverse is dead, that seems like useful information before tearing into the pump side. I'd also jot down the oil temperature when it fails if you can. The fact it comes back after 10–15 minutes makes heat look important, and having the actual temp plus pressure during the failure might make the pattern a lot easier to pin down.