184/185 Hydraulic Control Valve

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wrink3
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1977 IH 184
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184/185 Hydraulic Control Valve

Postby wrink3 » Tue Dec 31, 2019 9:56 am

Has anyone disassembled and rebuilt one of these? I would love to hear about your experiences and any lessons learned. You can get the o rings from Case that were in the rebuild kits but I'm not sure from the drawing where they go??? I know it should be obvious when I get it apart but I like to get my stuff together before I take things apart. My lift works well but goes down without any external leakage anywhere so I figure it is in the valve unit. Thanks for any help in advance

john2189
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Re: 184/185 Hydraulic Control Valve

Postby john2189 » Tue Dec 31, 2019 2:41 pm

Could be the cylinder piston seal worn and leaking by
'49 Cub (Vince)
'72 cub (Cecilia)
'41 allis B
'42 Allis B
'71 154 Cub Lo-Boy
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C-165 Wheel Horse
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wrink3
5+ Years
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Posts: 69
Joined: Thu Jun 09, 2011 4:59 pm
Zip Code: 65622
Tractors Owned: 1977 New IH Cub
1977 IH 184
Location: Buffalo, MO

Re: 184/185 Hydraulic Control Valve

Postby wrink3 » Tue Dec 31, 2019 3:36 pm

Wouldn't that result in an external leak and fluid loss? I don't have either of those...

Eugene
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Re: 184/185 Hydraulic Control Valve

Postby Eugene » Tue Dec 31, 2019 5:26 pm

There are two different control valves listed in the parts manual. Suggest removing the valve and identifying prior to purchasing parts.

Most likely the valve will need an O ring or two. Probably available individually at any tractor dealership.
john2189 wrote:Could be the cylinder piston seal worn and leaking by
They are single action cylinders. A leaking cylinder piston seal would normally leak all over the floor.
I have an excuse. CRS.

wrink3
5+ Years
5+ Years
Posts: 69
Joined: Thu Jun 09, 2011 4:59 pm
Zip Code: 65622
Tractors Owned: 1977 New IH Cub
1977 IH 184
Location: Buffalo, MO

Re: 184/185 Hydraulic Control Valve

Postby wrink3 » Tue Dec 31, 2019 7:06 pm

I have the later design that used primarily on the 185s and 184s. Also, I got the o rings from Case IH via Hoober Parts. They are pretty nice. The service kit lists the required o rings and 2 washers. They were able to cross reference the rings but not the washers--guess I'll cross that bridge as needed. The drawings just don't show where they go. I was just curious. I've never taken one of these things apart. Thanks

Eugene
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Re: 184/185 Hydraulic Control Valve

Postby Eugene » Tue Dec 31, 2019 11:16 pm

The process of replacing O rings is pretty simple. You shouldn't have a problem with which O ring goes where.
I have an excuse. CRS.

BigBill
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Re: 184/185 Hydraulic Control Valve

Postby BigBill » Wed Jan 01, 2020 12:35 am

Do you have a 3pt hitch with the valve that switches from the rocker shaft to the 3pt hitch?
These valves can leak inside causing the implements to drop. They take 9/16” o rings.

If your changing o rings on the control valve lay the parts out the way come out in other. Then match the new o rings to the older ones during assembly. Remember to clean the valve body and spool. Check for burrs in the ports that can cut the new o rings. Remember to pre lube the valve body and spool with hyd oil before assembly.
I'm technically misunderstood at times i guess its been this way my whole life so why should it change now.

john2189
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Re: 184/185 Hydraulic Control Valve

Postby john2189 » Wed Jan 01, 2020 1:17 am

john2189 wrote:Could be the cylinder piston seal worn and leaking by
.


Sorry was thinking it was a double action cylinder
'49 Cub (Vince)
'72 cub (Cecilia)
'41 allis B
'42 Allis B
'71 154 Cub Lo-Boy
656 Wheel Horse
C-165 Wheel Horse
Simplicity 20 HP Sunstar

wrink3
5+ Years
5+ Years
Posts: 69
Joined: Thu Jun 09, 2011 4:59 pm
Zip Code: 65622
Tractors Owned: 1977 New IH Cub
1977 IH 184
Location: Buffalo, MO

Re: 184/185 Hydraulic Control Valve

Postby wrink3 » Wed Jan 01, 2020 5:35 am

I appreciate the idea! Without pics or more data you were trying to help. The best thing I've found so far was a post to the forum in Mar 2018 by Landreo. The books are just kinda vague on this


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