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Randaleky 
Silver Level
Joined: 17 Aug 2011
Location: belfry, ky.
Points: 427
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 Posted: 05 Oct 2019 at 10:55pm |
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if you checked pressure at the filter and only got 60 then it appears like problem is back toward the pump. I an wondering if the back end of the pump which is for the convertor side is driven by a keyed shaft and the key could be sheared ? I will look it up on my parts book and see . this is stumping me also.
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Randaleky
Silver Level
Joined: 17 Aug 2011
Location: belfry, ky.
Points: 427
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Posted: 05 Oct 2019 at 11:36pm |
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when the problem first happened after operating 30 minutes , did the hydraulics for the loader bucket loose its power ?
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Big Jim
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Joined: 19 Sep 2017
Location: West Virginia
Points: 24
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Posted: 06 Oct 2019 at 11:15am |
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the picture in the parts manual shows where it is.
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Mikeys250
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Joined: 27 Sep 2019
Location: Juliette, Ga
Points: 21
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Posted: 06 Oct 2019 at 11:50am |
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No the loader hydraulics stay strong at all times.
I really think I’m gonna find this sump screen clogged and starving the pump for fluid. Since I had 150psi and I drained the fluid and I dropped to 50psi I think more settled on the screen when the fluid was drained.
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Randaleky
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Joined: 17 Aug 2011
Location: belfry, ky.
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Posted: 06 Oct 2019 at 4:41pm |
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My parts manual for the HD4 shows the screen assembly to be in line just short of the bend in metal line where it turns down to the sump. My HD 4 dozer does not have a screen in the line . I think many screens were eliminated by the owners . Might be some type of screen in the tube attached to the sump pan.
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Mikeys250
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Location: Juliette, Ga
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Posted: 06 Oct 2019 at 6:05pm |
The way I’m looking at mine it looks like it’s either bolted to the bottom of the rear compartment or inside the compartment. 
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Big Jim
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Location: West Virginia
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Posted: 06 Oct 2019 at 6:06pm |
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If you go down the line to the rubber hose. The hose goes on the cover asy.
The cover is held on with 8- 5/6 bolts. the screen is inside.
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Mikeys250
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Location: Juliette, Ga
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Posted: 06 Oct 2019 at 6:20pm |
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So I’m gonna loose all the fluid when I do that correct?
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Big Jim
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Location: West Virginia
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Posted: 06 Oct 2019 at 6:33pm |
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I hate to tell you, yes.
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Randaleky
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Joined: 17 Aug 2011
Location: belfry, ky.
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Posted: 06 Oct 2019 at 9:27pm |
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should be a drain plug on bottom of torque tube . use a plastic drain pan to save the fluid .
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Mikeys250
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Location: Juliette, Ga
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Posted: 09 Oct 2019 at 11:30am |
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Ok folks. I haven't made it the sump yet but I have another question yall might can help me with.
Does anybody know of a boneyard or anything that might have used loader buckets that will fit this tractor? Once I get it all running right I would like to put a 4 in 1 on it since its already plumbed for it.
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NomoreJohnDeere
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Joined: 24 Jul 2017
Location: Missouri Ozarks
Points: 308
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Posted: 10 Oct 2019 at 8:30am |
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HD3
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Tracy Martin TN
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Joined: 11 Sep 2009
Location: Gallatin,TN
Points: 10698
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Posted: 10 Oct 2019 at 9:17pm |
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Blount used parts, Hoboken, GA. HTH Tracy
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No greater gift than healthy grandkids!
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Mikeys250
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Location: Juliette, Ga
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Posted: 25 Oct 2019 at 1:33pm |
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Well I got the pressure up to about 230psi finally. Found the sump clogged and the line comes from the pump to the winch control valve and I was loosing pressure somewhere in the winch or valve so I bypassed they winch valve completely. Now I have full power in reverse all the time and only full power forward until the fluid gets up to temp. Stumped again. I’m chasing my tail it feels like
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Mikeys250
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Posted: 25 Oct 2019 at 2:34pm |
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Correction. I had the pressure up. I took the gauge off and started working it. Strong when cold but I put the gauge back on and I’ve lost pressure again. Also have a whining sound coming from valve once hot. Maybe the relief is sticking?
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Randaleky
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Joined: 17 Aug 2011
Location: belfry, ky.
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Posted: 25 Oct 2019 at 10:47pm |
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May need to take the shuttle shift valve apart to find problem . could be broken springs or gunked up.
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Randaleky
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Location: belfry, ky.
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Posted: 25 Oct 2019 at 10:54pm |
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or could be yet a problem in sump , lines , or even the filter . At least you know you can get pressure and clutches are ok. Hang in there .
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