![]() ![]() ![]() My guess based on your description and no knowledge of that machine is the pump will check out fine. That test will tell you what pressure the pump and system pressure relief are supplying. Before doing that you need to verify that the outlet block contains a pressure releif valve so as to not deadhead the pump. Just remove the pressure supply hose from the loader and connect your gauge to the hose. A pressure test ahead of the loader valve will tell you whether or not the pump is producing full pressure and that would be the first thing to check. Increasing RPM increases the flow rate from the pump and helps keep up with the pressure loss out the leak. The pump will basically make the same pressure regardless of RPM. If RPM improves lift power and speed I would suspect a leak. Is this a potential cause of the problem?Īny suggestions on how to diagnose this problem would be most appreciated.Ĭlick to expand.These are constant displacement pumps so the flow rate from the pump increases and decreases with RPM. I tried searching for relevant threads - found a suggestion to "burp" the outlet side of the hydraulic pump. I'm going to add some die to the hydraulic fluid so I can better tell fluid level at site glass, because it is hard to see.ĭoes the same hydraulic pump supply fluid to both the loader and 3-point system? If so, the problem would seem not to be the hydraulic pump. Looks a little milky still at the site glass. Last fluid change was in 2017, and fluid was milky looking (air, water?) at that time. I replaced the hydraulic filter recently, but does not change the condition. Rear 3-point system lifts at idle, so the problem appears related to the loader circuit. When there's a load, it needs to be much higher than that, and with a heavy load, it just can't handle it. We have to rev the engine to at least 1,300 rpm to lift the loader empty. ![]() Now, when attempting to lift at idle, the loader doesn't lift. Performance of the loader has decreased over time. Bought it new probably 15 years ago - only 719 hours on machine now, so only about 50 hrs avg./yr. We have an MX5000 Utility Special with a LB702 front end loader, and self-installed triple rear remotes (never quite right - leaking). ![]()
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