Flushing hydraulics

Joined
Jun 8, 2019
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City & State/Province
East TN
Long 460 that belonged to my Papaw. Hasn't been used much the last 10 years. I decided I'm going to put it to use this year with bush hogging and hay raking. So figure I better get everything serviced. 😆

I don't think the hydraulic filter has been changed in 20+ years. Maybe the original, but surely not.

Anyways, got water in the hydro. I'm going to flush it in attempt to get all the contamination out.

How would you flush it? I originally thought to fill it up with diesel, drive on flat ground slowly for about 5 minutes, then drain and refill w cheap hydraulic fluid. Run for a few hours, drain, and refill with 46 fluid like it calls for then go. I'll run a new filter during the flush process, and put a new filter in when the 46 fluid is poured in.

Am I asking for trouble? Have had a couple people suggested 50/50 diesel/hydro for the flush process. That makes sense to me.

Leave the lift arms down the whole time, right? That'd keep the diesel out of the lines I think.

here's a pic of the filter and drain plugs.
 

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Those 460 Longs are not a bad tractor. I would run some TSC cheap Hydraulic oil for a few hours and then change. From the Tractor Data it looks to take 18 quarts for the transmission. Probably the biggest problem with those is keeping the leaks fixed and the differential contracting band brakes. The brakes and clutch are both dry so no problem from the cheap hydraulic oil. Also, some parts are getting hard to get.

https://www.tractordata.com/farm-tractors/005/8/1/5815-long-460.html
 
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That looks like the remnants of a cotter pin attached to the one magnetic drain plug. Concerns me a bit.
 
Newer CAT machines use a 10w ENGINE oil for their hydraulics (CF2 grade), I suppose it has more detergents in it.. some cheap ATF would probably clean things really good too.
 
Yeah the amount of filings and debris on the drain plugs and filters concerns me. But being a Long their machine work and tolerances weren't the best so who knows whats considered "normal".
 

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