Tom74 Posted August 3 Share Posted August 3 I’m getting ton of whine from the hydraulic pump. It tends to get much better if I over fill it. I’m assuming the issue is with the suction tube seal. Where is this located and do I need to split the tractor to fix it? Quote Link to comment Share on other sites More sharing options...
mrfred54 Posted August 3 Share Posted August 3 Have you checked the hose connection in the differential housing threw the third link cover?? 1 Quote Link to comment Share on other sites More sharing options...
HydroTek Posted August 4 Share Posted August 4 Check to see that the filter gasket surface is cleaned on both sides -- and that the correct bolt length have been used to hold the cover on Check the suction jumper tube for the pump -- the jumper can get out of place -- or the seal can shrink away from the housing and suck air -- if the pump has been replaced , the length of the jumper tube needs to be checked , as that is what holds the jumper in place Check the super charge line as was suggested by @mrfred54 accessed thru the top link cover The last place is the suction oring in the rear housing / transmission split Do the easy stuff first , then work to the harder stuff Quote Link to comment Share on other sites More sharing options...
Tom74 Posted August 4 Author Share Posted August 4 6 hours ago, mrfred54 said: Have you checked the hose connection in the differential housing threw the third link cover?? I did, and I did not see a problem there. Quote Link to comment Share on other sites More sharing options...
Tom74 Posted August 4 Author Share Posted August 4 Thank you! I was wondering if that tube may be an issue. I just did a ton of work to my loader (resealed the cylinder and new hoses). I should probably change the filter anyway. Only question I have is why will the wrong bolt length affect the whine? I could see it causing a leak. But maybe I’m missing something. I’m positive I have the correct length in thought. I believe ther E are 2 bolts that are shorter due to a recessed hole. Quote Link to comment Share on other sites More sharing options...
HydroTek Posted August 4 Share Posted August 4 That filter gasket was sometimes difficult to remove from the surface -- if you don't get all the small parts off , air can be sucked thru the uneven surface -- just be sure the metal is cleaned With the age of the tractor , hard to know that the cover bolts are correct my comment was just to cause you to look and see that the bolts are not bottoming out Quote Link to comment Share on other sites More sharing options...
ksfarmdude Posted August 4 Share Posted August 4 that creates an obvious leak if oil level is correct I'd pull the pump and check for bolts and Oring the bolts can be checked for tightness on the outside near the step Quote Link to comment Share on other sites More sharing options...
HydroTek Posted August 4 Share Posted August 4 2 hours ago, ksfarmdude said: that creates an obvious leak if oil level is correct I'd pull the pump and check for bolts and Oring the bolts can be checked for tightness on the outside near the step "what you talking about willis" The pump mounting bolts or plate has nothing todo with the suction side of the system -- only the jumper tube fitment in that area Quote Link to comment Share on other sites More sharing options...
ksfarmdude Posted August 4 Share Posted August 4 It will if the oil level is low in that area if there's any pump issues it can cause any type of problem I would suggest he do pressure tests plus see what flow he has and check for air bubbles if there's air present Never seen the oil filter plate cause problems anyone with mechanical skill can change the filter and install a new gasket and check for a leak doesn't take a rocket scientist to figure that one out Quote Link to comment Share on other sites More sharing options...
hobbyfarm Posted August 5 Share Posted August 5 If your pump is whining change your filter before you do anything. Talking from experience. Mine clogged up with sludge 2 years in a row for reasons unknown and then was fine this year. Quote Link to comment Share on other sites More sharing options...
HydroTek Posted August 5 Share Posted August 5 2 hours ago, hobbyfarm said: If your pump is whining change your filter before you do anything. Talking from experience. Mine clogged up with sludge 2 years in a row for reasons unknown and then was fine this year. Reasons aren't unknown : Those tractors do not like getting wet Water will drain into the transmission at the "pockets" on the floor plate -- and run in around the bolts and at the top of the transmission to rear housing split -- there are no bolts in the center of that split at the top , and a pocket of sorts that collects water Put your 656 - 686 in the shed Quote Link to comment Share on other sites More sharing options...
hobbyfarm Posted August 5 Share Posted August 5 7 hours ago, HydroTek said: Reasons aren't unknown : Those tractors do not like getting wet Water will drain into the transmission at the "pockets" on the floor plate -- and run in around the bolts and at the top of the transmission to rear housing split -- there are no bolts in the center of that split at the top , and a pocket of sorts that collects water Put your 656 - 686 in the shed I will say I have probably had this tractor 15 years and it doesn't sit out. In that time frame it has had 3 hydraulic filters. One after I got it, one in 2021, and one in 2022. To the original poster I would think it is sound advise to change the filter before doing anything else. Quote Link to comment Share on other sites More sharing options...
HydroTek Posted August 5 Share Posted August 5 Sitting out , is not the issue Getting rained on is tho , as well as washing in the area of the steering column Moisture will also enter thru condensation that is why the recommendation of oil change every 2 years , or 1000 hours Most do not change oil until there is a problem or a major leak Quote Link to comment Share on other sites More sharing options...
Tom74 Posted August 20 Author Share Posted August 20 Thank you all for the help. I’ve been a little busy the last few weeks, but all the hay is put up and I have some time for maintenance. So, I’m going to change the hydraulic fluid this week. I’m going to pull the pump, replace any o rings I come across and just make sure they system is sealed up. If I take the top cover off the gearbox, can I get to that suction tube hose? Or can I even see it from the top so I can do a better inspection of it? I like to know what I’m getting into before I open something like this up, but I’m not finding many pictures on line. Quote Link to comment Share on other sites More sharing options...
HydroTek Posted August 20 Share Posted August 20 You can see the super charge hose by removing the top link cover on the rear of the tractor -- older tractors did not use that hose Quote Link to comment Share on other sites More sharing options...
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