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Take a look at the TM 5-2420-224-20-1 in chapter 1 it has a lot of specs. I know that the front circuit has a flow rate of only 8 gpm, compared to 26 gpm for the rear. I suspect that flow rate is more pertinent to what you want to know.I am wondering if the front hydraulic system of the FLU419 operates at 2,450 psi, like the rear system?
While I understand that is correct on the 406’s with steering wheel mounted valves, the FLU419 does indeed have a pressure relief in the valve stack behind the cab that runs the loader.The front hydraulic pump is belt driven so maximum pressure drops when the belt slips. That's the limiting pressure factor on this system. Check your belt, clean it, tighten if in good shape. The belt should ride high in the V pulley at the front of the engine, even a little higher than the outside circumference of the pulley. The belt is 12.5 mm
When I was looking into it, I took the NSN numbers, and did a look up on those, and got the dimensions from the spec. The dimensions were of course all metric. I then took the dimensions and plugged them into NAPA to find best fit. What I found was not an exact match, due to SAE - Metric conversion, but I decided it was close enough for government work. When I replaced my belts I had the cab tilted which made it relatively easy. FluFarm and others have replaced the belts with out tilting the cab, but found that adjusting the tension on the belt that drives the hydraulics for the front end loader particularly trying. I think his solution was to take a pair of vice grips to the threads of the adjusting bolt and tighten it that way. I would not say it was his proudest moment, but you do what you have to to get the job done. I will try to find the picture I took with the cab tilted so you can see what you are up against.
Yeah, I foresee a tilted cab in your future. It is an old break, so maybe you can get by like you had for a while. The picture that I sent you was for the belt adjustment to the power steering. it is the outer most belt, so you will still need to remove it to get a replacement on. I wonder if you can weld a chunk of steel in an dress it up so it is not quite as sharp.
Thank you so very much for the response and follow up!!! I got in a major car accident the day I sent you the message and I am now just barely recovered, and resuming my life. Thank you again and happy holidays to you!!!!Tarek, if my notes on the old belts are correct, the pump is 9440, the P/S is 9350, and the water/alternator is 9670.
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