Hi I recently bought a David Brown 880 Selectamatic tractor 66/67 model.
The 3 point linkage (hydraulics) will not lift if the tractor is pointing downhill, even on the slightest slope. It’s fine if tractor is uphill or on level ground. Both filters are new and oil level is correct. If I raise the 3 point linkage on level ground and then back the tractor slightly up an incline or drive it downhill, so tractor is pointing downhill. While on that incline I can lower the 3 point linkage but it will not raise again while on the downhill. It does not appear to be starving of oil, because it makes no noise. I have tried overfilling about 3 litres and it made no difference. If I have to dismantle it, I would first like to have some idea what I should be looking for. Has anyone experienced this issue and or have some constructive input on this? Cheers DGS
The 3 point linkage (hydraulics) will not lift if the tractor is pointing downhill, even on the slightest slope. It’s fine if tractor is uphill or on level ground. Both filters are new and oil level is correct. If I raise the 3 point linkage on level ground and then back the tractor slightly up an incline or drive it downhill, so tractor is pointing downhill. While on that incline I can lower the 3 point linkage but it will not raise again while on the downhill. It does not appear to be starving of oil, because it makes no noise. I have tried overfilling about 3 litres and it made no difference. If I have to dismantle it, I would first like to have some idea what I should be looking for. Has anyone experienced this issue and or have some constructive input on this? Cheers DGS