BMW1 42 #1 Posted July 23, 2023 I am new to hydraulics and am putting a Johnson Model 10 Midget Loader on a Wheelhorse D200. I finally got everything hooked up but when I operate the spool valve nothing happens. What do I have wrong? The pump is being run by the PTO and the I did engage the PTO. Belt and pump are spinning. The PTO pulley is 5" in diameter and the pulley on the pump is 6". I included the .pdf for the pump and the loader manual .pdf. The reservoir is full - within 8 inches from the top, according to the loader manual. I unscrewed the hose connector going into the spool valve and oil came out so it seems like oil was getting to it. The first picture is the spool valve, two hoses on the right are for the loader cylinders. Two on left are for bucket cylinder. The second picture is the plumbing from the reservoir to the pump. Third picture is the pump. It is a bi-directional pump. I included the pump manual, I have pump model 4F657. The pump directions did not indicate which outlet is input and which is output, so I thought it did not matter? Is that my problem or is the plumbing from the reservoir to the pump a problem? I was trying to get out of the way of the tire. I'm using a 3/4" hose from reservoir to pump for suction and a 3/8" hose from pump to spool valve. Thanks. Johnson Model 10 Midget Loader Manual.pdf Grainger Cocentric 4F657_1.pdf Share this post Link to post Share on other sites
Pullstart 62,840 #2 Posted July 23, 2023 Is the pump spinning in the right direction? Share this post Link to post Share on other sites
wallfish 16,994 #3 Posted July 23, 2023 (edited) 1 hour ago, BMW1 said: It is a bi-directional pump. The pump directions did not indicate which outlet is input and which is output, so I thought it did not matter? It matters. You will need to determine which is IN and which is OUT depending upon the direction of travel it is set up for. I'm not familiar with that pump but the case drain (#10) should be on the bottom. If it is on the bottom, it appears your plumbing IN and Out are correct. How long did you run it? The air needs to be bled out by operating the valves but that typically goes pretty fast to notice the rams moving. But it does take a bit to get ALL of the air out. And pay attention to the reservoir level because it will drop fast once the cylinders fill Edited July 23, 2023 by wallfish 2 Share this post Link to post Share on other sites
WHX?? 48,815 #4 Posted July 23, 2023 (edited) When they say it is bi-directional this can be true with a gear rotor pump but direction of rotation is still critical. All matters on your rotation and which ports your suction and pressure lines are connected. I would think the ports would be labeled in/out for cw/ccw direction of rotation? I would say try flipping the pump 180 but be ready for some oil spillage now. The way it looks in your pics the pump should be running cw facing shaft end but it depends on which gear is driven and which is the idler. I didn't catch that in the pump specs. Edited July 23, 2023 by WHX?? Share this post Link to post Share on other sites
Handy Don 12,216 #5 Posted July 24, 2023 2 hours ago, WHX?? said: The way it looks in your pics the pump should be running cw facing shaft end but it depends on which gear is driven and which is the idler. I didn't catch that in the pump specs. The pump schematic shows the driven shaft on top and case drain on the bottom, as @wallfish noted. So, then if the drain is on the bottom and (looking from the front of the tractor toward the engine) the belt is rotating ccw I’d say IN is on the left and OUT is on the right, Don’t know anything about D200’s engine rotation though! Share this post Link to post Share on other sites
BMW1 42 #6 Posted July 28, 2023 Just wanted to let everyone know I reversed the hoses on the pump and everything works now. Thanks for all the suggestions. 4 1 Share this post Link to post Share on other sites
wallfish 16,994 #7 Posted July 29, 2023 1 hour ago, BMW1 said: Just wanted to let everyone know I reversed the hoses on the pump and everything works now. Thanks for all the suggestions. Thanks for the update!!! Always helpful for future searches on the subject. Is that the drain plug (indent) on the top of the pump in the pic above? Assuming you just turned the pump 180 deg and reconnected the hoses. 1 Share this post Link to post Share on other sites
BMW1 42 #8 Posted July 29, 2023 9 hours ago, wallfish said: Is that the drain plug (indent) on the top of the pump in the pic above? Assuming you just turned the pump 180 deg and reconnected the hoses. The Drain Plug is on the bottom of the pump. I did not change the orientation of the pump. I just unscrewed the hoses from where they were and swapped them to the other side. It is a bi-directional pump. The ports on the pump had no markings to indicate which was input/ouput and I could not find anything in the document that came with the pump indicating inlet/outlet. I attached a picture of the pump from the bottom showing the drain plug. Share this post Link to post Share on other sites
Handy Don 12,216 #9 Posted July 29, 2023 (edited) 2 hours ago, BMW1 said: The Drain Plug is on the bottom of the pump. I did not change the orientation of the pump. I just unscrewed the hoses from where they were and swapped them to the other side. It is a bi-directional pump. The ports on the pump had no markings to indicate which was input/ouput and I could not find anything in the document that came with the pump indicating inlet/outlet. I attached a picture of the pump from the bottom showing the drain plug. The reason the pump isn't labeled in and out is because these depend on the direction of the input shaft rotation. The doc certainly could have been clearer about that! Glad to hear all is well with your loader now. 😄 Edited July 29, 2023 by Handy Don Share this post Link to post Share on other sites
