slow hydraulic movement at startup - IH 240U

At start-up the hydraulic, both loader and 3pt hydratouch, are very slow. After warming up the hydraulics move better but still not very fast.

The loader frame is definitely custom. The arms and bucket, and pump look like an after market upgrade. Pump is moved from the side to the front for this update. There is a valve that switches power from 3pt to the loader to give respectively full pump flow. Resevour and filter are behind seat, original manual for this model says there is a filter screen (not a modern filter) near the pump but I don't see this since the pump was moved, it must have been removed during the update.

I ordered a new filer and will install that first. I could try bleeding the air too perhaps, but I don't have any rocky movement. Maybe its just a weak pump for the loader. The 3pt hydratouch seems to react fast if I divert all power to that.

Any advice would be appreciated to get the loader hydraulics moving faster.

jerry

When the fluid is cold the viscosity is higher and the flow rate reduces somewhat. That"s why you"re hydraulics are quicker when they are warmed up. But if they are still too slow, and if you relief valve is not stuck open or you don"t have a lot of line leakage, etc then your pump capacity is too low either because the pump is too small or it is worn and cannot supply it"s design capacity.
Is there a lot of noise that indicates air in the lines? If so the suction line to the pump may have an air leak and that will reduce the flow also.

Hope this helps you.

I don't think its an air leak. Its not any more noisy then my ford 3400 which has fast movement.

So if I put a bigger pump on it would increase the load on the engine. I wonder if there are pumps that have variable load/displacement so its adjustable for different tasks.

jerry

Yes there are variable displacement pumps but they are for closed center hydraulic systems and you have an open center hydraulic system. In an open center sytem the pump supplys flow to the system that goes out to the valves and thne returns to the resevior. With a variable displacement pump, as the flow demand increases, the pump suplies more flow but it doesn"t put out all the flow through the valves until there is a demand for more flow. (I don"t know if that makes sense to you.)I"m over my head in telling you what the differencea are without going into some research on hydraulic systems but there are more knowledgeable people than I on that matter.

I given you some very fundamental info regarding hydraulic systems that can help you understand how the basic sytem works. Glad you found it useful.