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  #1  
Old 05-04-2019, 09:18 AM
IH1086 IH1086 is offline
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Location: Wisconsin
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Default 682 Relief Valve Issue/Pump Issue?

Hello everyone. I know this seems redundant, but please read it all. I can't find any answer to this issue. I'll tell you a little backstory on it first.
I bought this new to me 682 two years ago cause I always wanted one. It was all original and running when I bought it, but had a built in mosquito repellant. It came with the mowing deck and snowthrower. My first project was to create a boat anchor out of the Kohler, out of life engine that was in it. I had a lightly used Honda GX620 laying around I bought at an auction a while ago to put on the feed cart, but never did. I put the Honda in it with some modifications right away. I opened the rear end and cleaned out the gunk from the hytran, flushed, refilled with hytran, and installed a new WIX 51410 filter. Mowed and cleaned out the driveway with it with no issues until last fall. The left side relief valve started to leak. I read a lot about the o-rings going bad, so i decided I would rebuild them. That worked great.... for about a month. So I broke down and bought new ones figuring I must have goofed something up. Good for a week with the new ones, but then again, the left side started to weep. I thought no way, but I guess it's possible I have a bad one. I swapped them side for side, and right away the one that was on the right started to leak when put on the left side, and the one from the left installed on the right was dry. Well winter came, and I got busy with other projects and plowing so I just used it as it was, and just made sure to check the oil level before I used it. It worked with just the left side weeping a little until I went to use it last. I went to pull out of the shop to clean up the last dump of snow, and there was a pretty good trail following me. Back into the shop, and I found both valves had oil coming out of them pretty steady. My thoughts were there must not be enough pressure to push the valves all the way open, but enough to make the tractor go. Maybe I have a plugged filter, and didn't get enough of the gunk out when I flushed the rear end, and it's now all in the filter. So I took the filter off, and there was hardly any oil in it, and it looked clean. I thought I've seen plugged fuel filters that looked decent yet, so on a new filter went. The oil level was topped back off, started it up, and no difference. Still leaking badly from both valves. Now I'm wondering is the pump shot, is there something in there that could restrict flow, or is it getting air somewhere. The oil wasn't foamy, so I'm not thinking its sucking air. Hytrans doesn't really foam, but I've had issues with some of the farm tractors with a broken pickup tube that made good oil look like it was full of water and foamy. Is there a pickup tube in the rear end of this tractor, and how hard is it to get to? I think I remember seeing one toward the front when I had the back cover off, but maybe it's a return line? If you've made it this far first of all thank you for reading my novel, but I like as much info as possible, so I figured I'd give it to start. Second, any ideas or experience with this type of issue? Any kind of help will be great! It's finally starting to green up good around here!
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Old 05-04-2019, 10:26 AM
R Bedell R Bedell is offline
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First, welcome to OCC.......

Quote:
Is there a pickup tube in the rear end of this tractor,
YES....there is. Item #36 in the attached Image.
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File Type: jpg Suction.jpg (17.5 KB, 205 views)
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CC Models: 100, 105, 1450, 782, (2) 784, & 2072

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Old 05-04-2019, 10:38 AM
IH1086 IH1086 is offline
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Thanks for the welcome R Bedell. #36 in the picture looks like it will be the pickup. It also looks like it's on the outside correct?
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Old 05-04-2019, 11:55 AM
R Bedell R Bedell is offline
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Quote:
It also looks like it's on the outside correct?
Yup, right under the Hydro Filter.
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CC Models: 100, 105, 1450, 782, (2) 784, & 2072

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Old 05-04-2019, 12:24 PM
IH1086 IH1086 is offline
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Thanks for the info. I'll start there.
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Old 05-04-2019, 12:40 PM
Dart1917 Dart1917 is offline
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I would guess your charge pump relief valve is stuck allowing to high a pressure at the check valves. Down load the manual and it will explain how to check better than I can. As far as the almost empty filter I don't think it has a drainback valve and the filter sits mostly above the oil level so a lot of the oil will drain back when the tractors not running.
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Old 05-04-2019, 07:19 PM
IH1086 IH1086 is offline
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Could you point me in the direction of the correct manual, or the name of it? I've downloaded a couple and can't find anything about the relief valve.
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Old 05-04-2019, 07:54 PM
R Bedell R Bedell is offline
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It is in the Technical Library Section..... Manual
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CC Models: 100, 105, 1450, 782, (2) 784, & 2072

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Old 05-04-2019, 10:52 PM
Dart1917 Dart1917 is offline
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I looked at the 82 series manual and it shows the charge pump relief on page 3-37 and says to go to page 2-94 for instructions on checking pressure but there is no page 2-94, section 2 ends at 2-65 I think. You could try the Quietline manual, the procedure should be the same.

https://s3.us-east-2.amazonaws.com/c...ervice+Man.pdf

Go to page 2-92 for pressure check
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Old 05-05-2019, 07:54 AM
IH1086 IH1086 is offline
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I looked at the manual and found the right stuff. I just got to get an adapter and 1/8" pipe fitting to check it. I don't think I have anything that small laying around here. Thanks for the help guys. I'll post what I find out. I'm going to mow with the Gravely today to get everything that isn't too soggy yet cleaned up a bit. It supposed to be rainy all week again, so I should get some time to putz with it.
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Cub Cadet is a premium line of outdoor power equipment, established in 1961 as part of International Harvester. During the 1960s, IH initiated an entirely new line of lawn and garden equipment aimed at the owners rural homes with large yards and private gardens. There were a wide variety of Cub Cadet branded and after-market attachments available; including mowers, blades, snow blowers, front loaders, plows, carts, etc. Cub Cadet advertising at that time harped on their thorough testing by "boys - acknowledged by many as the world's worst destructive force!". Cub Cadets became known for their dependability and rugged construction.

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