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I'm rebuilding a Sundstrand #90-1136 that came out of my 1974 WH B-100. I Found this company www.novahydraulics.com that has the entire rebuild kit PN / 99890. It shipped quick too. Gordy is the man you want to talk to regarding Sundstrand units. Good hunting all. 

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@OLDASDIRT Thank you for the information. Maybe this info should be pinned?!?!

Oh, and :WRS:

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:text-welcomeconfetti: TO :rs: Thanks for that useful link!

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Glad to hear that - right now we only know of LJ Fluid Power in Michigan - they stellar service and know these older Sundstrand units very well , I've bought a lot of parts from them recently, great bunch up there. From what I was told, a lot of the parts for the older units are still being made - that pump setup was used for a long time in other equipment besides WH so parts stock is still around, which is good to hear for us.

 

I'd be really interested to see what is in the "kit" specifically - is this just a re-gasket/re-seal kit or something more advanced like the bearings, thrust plates, ect...?

 

Sarge

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20 hours ago, OLDASDIRT said:

I'm rebuilding a Sundstrand #90-1136 that came out of my 1974 WH B-100. I Found this company www.novahydraulics.com that has the entire rebuild kit PN / 99890. It shipped quick too. Gordy is the man you want to talk to regarding Sundstrand units. Good hunting all. 

:WRS:            Inquiring minds want to know;  what comes in the kit?

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Here's what comes in the kit. There is a pump gasket { between the pump and the transaxle} that is missing from the photo otherwise this is it.

DSC00062.JPG

DSC00063.JPG

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Well @OLDASDIRT, I used your advice and consulted with Gordy of Nova Hydraulics to rebuild or have parts for my 1968 Sundstrand #90-2046 and they recommended I contact  LJ  Fluid Power in Michigan. Thanks again @Sarge for your referral! 

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Just be sure to have the drawing and parts list in hand when you talk to them. They do not have the same parts listings or the WH drawings from the Sundstrand manual. They can easily cross reference the part numbers you have directly over to the Sundstrand numbers they use, so it's not an issue.

 

Be ready to go quickly and ask any questions about parts groups as you go along. This is a very busy shop and the number of questions they will answer is pretty limited. They also don't seem to be willing to do any diagnostic guesswork, if there is some problem beyond the known issues in the pump/motor you're better off sending it in for rebuild work. That's why I brought up swapping the unit out for the later C series model piston to piston pump and motor. The latter version can be repaired and rebuilt, the early hydrogear is very limited in what parts can be fixed.

 

@pfrederi

Has posted photos of the internal differences between the early hydrogear units and the later piston to piston pump, those pictures really tell the tale of what little can be done with the early Sundstrand.

 

 

Sarge

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Thanks  again @Sarge! My plan is to swap out my Sundstrand for the same 1968 Electro 12 "suppose-to-be-working" from Joe's Outdoor that I purchased. My last resort will be to use the 1973 No Name Auto piston-to-piston Sundstrand. I may want to someday want to restore the No Name, or maybe not, it has a Kohler breakerless ignition and the module went bad. :( Oh well, I think at this time I want to make the Electro 12 drive/work first. Purchased hoses/gasket from @wheelhorseman along with seals for the valve rods. Lowell recommended it. I don't even know what/where the valve rods are?? Newbie to the hydro world.

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Valve seals are in the lift valve,  good idea and there are threads on here to do that process.

 

The breakerless system can be converted back to points, not really hard. I don't have a computer right now,  so I won't be around much.

 

Sarge

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