• Thank you for visiting HeavyEquipmentForums.com! Our objective is to provide industry professionals a place to gather to exchange questions, answers and ideas. We welcome you to register using the "Register" icon at the top of the page. We'd appreciate any help you can offer in spreading the word of our new site. The more members that join, the bigger resource for all to enjoy. Thank you!

Bobcat T770 track motor drive oil

Shimmy1

Senior Member
Joined
Aug 14, 2014
Messages
4,357
Location
North Dakota
@willie59 or anyone else. What kind of oil does Bobcat use in the finals on the latest model T770? I didn't get the serial number, but it's the newer style with 2 plugs across from each other. Doesn't say in the book, Bobcat says "we have no idea what oil it takes, just that it comes in these little bottles for $30 each". I mean, WTF? Never have ran into this before where there isn't a chart in the manual showing what oil for a compartment. TIA.
 

Tags

Senior Member
Joined
Feb 19, 2012
Messages
1,618
Location
Connecticut
That’s some great dealer support right there….have you pulled the high level plug to see if it smelled like gear oil?
 

Shimmy1

Senior Member
Joined
Aug 14, 2014
Messages
4,357
Location
North Dakota
That’s some great dealer support right there….have you pulled the high level plug to see if it smelled like gear oil?
Yes. It does smell like gear oil, but is very thin, thinner than any 75-90 I've dealt with.
 

Shimmy1

Senior Member
Joined
Aug 14, 2014
Messages
4,357
Location
North Dakota
Come on, guys. Nobody has dealt with this before? It certainly seems like this Bobcat drive motor oil is on par with nuclear codes. What the hell gives? I've spent the last hour searching and nothing. Everyone running Bobcat just pay the $160 per gallon for this magic juice?
 

Tags

Senior Member
Joined
Feb 19, 2012
Messages
1,618
Location
Connecticut
Everyone says that gear oil is archaic and I personally can’t stand the smell of it, probably because if you’re smelling it, something is coming apart :D So the last time I changed final drive oil in my excavators and Kubota track skid steer I took Niges advice and used
Cat TO-4 50wt.
 

Vetech63

Senior Member
Joined
Aug 10, 2016
Messages
6,440
Location
Oklahoma
It wouldn't surprise me if its synthetic oil. It should specify on the machine lube chart.........either on the machine or in your operator's manual.
 

Shimmy1

Senior Member
Joined
Aug 14, 2014
Messages
4,357
Location
North Dakota
Their response was this:

"We have no idea what it calls for, other than "this" particular 17.5 oz. bottle, of which you need two, one per side. There is the exact amount of oil required for each drive motor in each bottle. They're $29.84 each, we have 5 on the shelf. Should we put them on a ticket for you?"

THIS IS PRETTY MUCH A DIRECT QUOTE.
 

Shimmy1

Senior Member
Joined
Aug 14, 2014
Messages
4,357
Location
North Dakota
That’s some great dealer support right there….have you pulled the high level plug to see if it smelled like gear oil?

Called 6 different dealers today. Apparently this oil is refined from hopes, dreams, and unicorn p!ss. Every single man I talked to agreed that it's not motor, hydraulic, gear, or ATF, and, at $6000 per motor, one probably shouldn't risk anything else in it.

What a bunch of garbage. Never in 35 years have I seen such a thing. Great job, Bobcat. Now I have another reason to look at a Kubota.
 

Tones

Senior Member
Joined
Mar 15, 2009
Messages
3,085
Location
Ubique
Occupation
Ex land clearing contractor, part-time retired
I don't know if it's any help but because of the heat build up in hydraulic driven planetary hubs a good quality synthetic oil is a must especially in worm climates. Apparently mineral oil breaks down quickly and loses its viscosity. I can't remember the grade of oil I used, the machine was sold 3 years ago.
 

Lee_in_Georgia

Well-Known Member
Joined
Oct 28, 2020
Messages
59
Location
Georgia
I think I usually pay around $20/bottle for it. It's handy that Bobcat's version is measured at the precise amount you need and comes with a little hose (woohoo... how nice of Bobcat to include a nickel hose :D). Since the drive motor doesn't have the middle plug to check the level, getting the correct amount in is somewhat important. I think the manual says replacement at 500 hrs, so at $40 I just use theirs instead of fretting too much. Now, if you're doing multiple machines every three months then I get it! That's gonna add up fast. I know on our JD 35D we just use 80w90 full synthetic gear oil and have had no problems at all... but I was able to cross reference it somewhere.
 

Shimmy1

Senior Member
Joined
Aug 14, 2014
Messages
4,357
Location
North Dakota
I think I usually pay around $20/bottle for it. It's handy that Bobcat's version is measured at the precise amount you need and comes with a little hose (woohoo... how nice of Bobcat to include a nickel hose :D). Since the drive motor doesn't have the middle plug to check the level, getting the correct amount in is somewhat important. I think the manual says replacement at 500 hrs, so at $40 I just use theirs instead of fretting too much. Now, if you're doing multiple machines every three months then I get it! That's gonna add up fast. I know on our JD 35D we just use 80w90 full synthetic gear oil and have had no problems at all... but I was able to cross reference it somewhere.
It's not at all the cost that has me buggered up, it's the fact that we are snowed completely up, have a great Cenex hub here that carries every fluid imaginable, but this stupid Bobcat uses fairy dust infused oil. The machine belongs to a friend of mine, and I asked him when he'd serviced those motors last since we had those issues on ours last spring. He says no idea, hasn't since he's owned it, over 600 hours, no idea when it was serviced before. I dug out the manual, checked both, there might have been 5 oz total left in each. Manual says "Contact your Bobcat dealer for oil". Well, we're in the middle of a blizzard, he had to move snow with it all day today, closest dealer is 50 miles away on no travel advised roads. If the aholes at Bobcat would have just used 75-90 or TDTO, we wouldn't even be having this conversation.
 

Lee_in_Georgia

Well-Known Member
Joined
Oct 28, 2020
Messages
59
Location
Georgia
Man, that is a problem. I guess were it me I'd order some online and then measure out some 75w90 full synthetic gear oil and use that until the other arrived. Personally, I'd worry more about running it low (or with old oil) than the incorrect oil. Others here know more about it than I do, so hopefully, they'll chime in now that we know your situation. Good luck and hope it goes well for you.
 

Shimmy1

Senior Member
Joined
Aug 14, 2014
Messages
4,357
Location
North Dakota
Man, that is a problem. I guess were it me I'd order some online and then measure out some 75w90 full synthetic gear oil and use that until the other arrived. .

Problem with doing that is there are wet disc brakes built-in to these finals. Also, the older design without the brakes DID use a synthetic gear oil, and it seems the dealer guys are adamant that you cannot use the old oil in these newer motors. One guy suggested that he thinks it's similar to ATF, but after draining it out, I'm pretty sure it's not. I'm familiar with the TranSyn used in Allisons, and this stuff feels more like a heavier hydraulic oil or drivetrain oil.

I found out a little while ago that he managed to get someone over to the dealer and pick up 4 bottles. He changed them both out, and is going to change them again tonight when he shuts down. What a clusterfrick.
 

KSSS

Senior Member
Joined
Feb 27, 2005
Messages
4,337
Location
Idaho
Occupation
excavation
Didn't Bobcat do this with their hyd. fluid as well? Not telling anyone what the mix is? I am remembering a thread along those lines, but I could be wrong. I presume wants you to go to BC and buy what they tell you to buy at a price that isn't reduced by easy availability. Maybe these things are proprietary and you couldn't get it anywhere else anyway? I have no idea for certain, but since hyd pumps and drive motors are commercially sourced, I have a hard time thinking that BC devised a particular formula for the hyd or drive motor systems that is particular to BC machines only. Whatever BC's motivation really is, I doubt they are going to share with us what their business plan is on this issue....as much as I would like to know. Mine run 75-90 Hypoid oil. I change it every 300 hours.
 
Top