Bobcat 825 Hydraulic Fluid

[New825Guy]

www.firgelliauto.com/ is a major supplier of linear actuators. I have used them on motorized ladder racks of fire equipment and have been very happy them. I'm thinking 12 inch stroke and 400 pound lift will do. I doubt you will beat the price. You could be the first to go remote control on your cab tilt. I know, I know, a little to far on that but its late. I was looking at gas struts. About the same money but it would be my luck to get the cab forward and have to winch it back. Would need some calculations there, it's a start. jeffco

Great forum and great info. I have had my 825 for two years now. I have a great deal of water in the hydraulic fluid. This appears to be cased by a very deteriorated gasket around the pump cover. The fiberglass cover itself appears soild. I intend to replace the gasket with a rubber one I am having made. I have purchase the Hydraulic fluid and the filters to replace the hydraulic oil (thanks to the info on this forum) I have two questions. 1). The third filter i the sump under the pedals. I assume that once I remove the pedals and scrape away the built-up mud that there is some kind of access pannel to get to the filter? 2). The pumps under the cover look in perfect condition. I beleive that the previous owner had them replaced before he sold the machine. Can looks be decieving. Is it possible that beingRFC130336 - 2013 Rate Increase Phase 2res constantly bathed in oil preserves their apperance? The pumps hoses and clamps all look brand new. I don't have a means to test the compression.

 

[2003rubiblue]

Great forum and great info. I have had my 825 for two years now. I have a great deal of water in the hydraulic fluid. This appears to be cased by a very deteriorated gasket around the pump cover. The fiberglass cover itself appears soild. I intend to replace the gasket with a rubber one I am having made. I have purchase the Hydraulic fluid and the filters to replace the hydraulic oil (thanks to the info on this forum) I have two questions. 1). The third filter i the sump under the pedals. I assume that once I remove the pedals and scrape away the built-up mud that there is some kind of access pannel to get to the filter? 2). The pumps under the cover look in perfect condition. I beleive that the previous owner had them replaced before he sold the machine. Can looks be decieving. Is it possible that beingRFC130336 - 2013 Rate Increase Phase 2res constantly bathed in oil preserves their apperance? The pumps hoses and clamps all look brand new. I don't have a means to test the compression.

1) That third filter is a several hour project on its own. I just did mine for the first time a couple weeks ago and i'll give you the pointers I wish I had. Loader arms all the way up, blocked up with a hoist, or some angle iron clamped around the hydraulic ram, flip the cab all the way forward and support it. There is a large access cover under that 40lbs of mud on your floor under the pedals, you will nee to unbolt the entire pedal assembly from the machine, but if you are clever like me you wont have to disconnect the linkages. My linkages were a pain and didn't look like they were going to come off without a fight, and my battery tray was in the way of completely removing them so I worked around it. I unbolted the pedal footwell thingy, disconnected the linkages at the back of the machine at the valve block,and I was able to rotate the pedal assembly towards the side where the linkages attach. I used a bungee cord to hold it there and worked from the other side of the machine. Once you get that pedal assembly out of the way it becomes very clear what you are doing. The access cover is right there, twelve bolts removes it, and the filter is directly below that. My filter had been in the sump for so long all of the red pain on the Baldwin filter had been removed. I assume the filter has been in there for 10-15 years!! 2) My pumps look brand new as well. I assume being bathed in oil constantly for 30 years makes them look good. Any more Q's just ask, I have been learning a lot about the 82 lately, Brian

 

[floodzone]

i too have an 825 .think its a 76 thou,i always have trouble in the winter with the hydraulics freezing up. after changing the fluid and filters three times and still not being able to see any signs of water, i found a new trick that works.i installed 12v hydraulic heaters on the two filters on the side.you just wrap them around the filters with tie wraps and wire them to a switch .works every time .love my machine and i think it will be around for a long time(probably couldnt get much for it anyway)

 

[New825Guy]

i too have an 825 .think its a 76 thou,i always have trouble in the winter with the hydraulics freezing up. after changing the fluid and filters three times and still not being able to see any signs of water, i found a new trick that works.i installed 12v hydraulic heaters on the two filters on the side.you just wrap them around the filters with tie wraps and wire them to a switch .works every time .love my machine and i think it will be around for a long time(probably couldnt get much for it anyway)

Thanks for the input. I ended up taking out the pedal assembly, there was a broken bearing that needs fixing (Just one more thing). The cover was there under the mud with a few missing bolts. I broke some more getting the cover off. The cover is shot and the gasket is just about non existant. I am having a new heavy steel cover and new gasket made. I have drilled out and retapped the bolts. Very careful not to get metal bits in the oil. Hope to get it all back together this weekend. And I hope this will solve the water in the oil issue. That third filter is ..... well it is what it is. I enjoy the machine no computers and simple to use.

 

[HDgrinder]

Couple of quick questions for someone. Just took "borrowship" of an 825 bobcat. It has water in the hydraulic fluid. Where is the sump plug for draining the fluid, and where do you put the fresh fluid back in?? I can only see that you might put it in throught the hydraulic radiator? Also how much fluid will it take from empty? Thanks