udt vs sudt, do they mix?

[poldies4]

Did my 50 hr service yesterday. It went well, but I lost about two quarts +- of hydro fluid. They sold me udt, I assume that is what is in their. I topped it off with the udt, then wondered if they had udt or sudt in it? Does it matter? Maybe my delivery manifest would specify? I'll check, but the million dollar question is does it matter if you mix udt and sudt? I assume that it does, but replacing 3.7 gallons seems wasteful at this point, not great for our mother earth. Thanks for the help..

Also, my resevoir for my radiator is completely dry. Can I buy any 50/50 mix and top it off? Winter is on it's way, don't wan't just water.

 

[art]

I'd say yes and yes!

You ccould top off with UDT although the super would be better in a cold area.

The 50/50 mix would be fine.

 

[bp fick]

You want sudt in that BX, trust me. Since you are only topping off, it is a no brainer.

Yes, they mix. But the BX, especially north of the Mason-Dixon, appreciate the sudt. It is a better product, flat out. Check the specs. Hot or cold. The end.

 

[bp fick]

Poldies4, you put udt in there. It is NOT a problem. That's only 20% of the total. Your manifest won't say.

You won't notice any difference, in all likelihood. But when the time comes for the full replacement, go with the Sudt, even though it is bit more money.

 

[poldies4]

sudt next time for sure. Thanks for the replies. I'll be sure to have that cork ready next time too, it's a bit of a shock when the hst screen comes out. I was at best partially prepared. (next time I'll pull the rear wheel first) My hst screen had what appeared to be a scratch, or some line that looked like it could have been a seam? It was a little rough along that line, is this damage, or normal for this part? Thanks again!!

 

[bp fick]

Normal.

I do not remove the wheel/tire. Had enough room.

Yeah, you just can't have the cork handy enough. Also, always leave the dipstick in place when doing this method. Don't want makeup air rushing in.

 

[poldies4]

Thanks BP, enjoy your Holiday!!

 

[LBrown59]

Did my 50 hr service yesterday. It went well, but I lost about two quarts +- of hydro fluid. They sold me udt, I assume that is what is in their. I topped it off with the udt, then wondered if they had udt or sudt in it?
1*Does it matter? Maybe my delivery manifest would specify? I'll check, but the million dollar question is does it matter if you mix udt and sudt? I assume that it does, but replacing 3.7 gallons seems wasteful at this point, not great for our mother earth. Thanks for the help..

Also, my resevoir for my radiator is completely dry.
2*Can I buy any 50/50 mix and top it off? Winter is on it's way, don't wan't just water.

1*I would have replaced the udt with Sudt when I changed the filter.
2*No you need an antifreeze formulated especially for diesels.

 

[LBrown59]

sudt next time for sure. Thanks for the replies. I'll be sure to have that cork ready next time too, it's a bit of a shock when the hst screen comes out. I was at best partially prepared. (next time I'll pull the rear wheel first) My hst screen had what appeared to be a scratch, or some line that looked like it could have been a seam? It was a little rough along that line, is this damage, or normal for this part? Thanks again!!

No need to pull the wheel.

 

[crazyal]

I though I read where some people use a vaccuum in the filler tube to suck air in through the drain to keep the fluid from running out. I'm no where near the 50hr mark and the company I work for has almost every size of rubber plugs but thought I might try it to see if it stops the oil from leaking out.

 

[crazyal]

It was years ago but I thought someone said that you got a hose that would fit into the hole for the fill/ breather and then wrapped tape around the pipe so it would stay in place and not suc air in around it on it's own. That since it's the filler/ breather it's above the oil line so no oil would get sucked up into the vac. At least that's what I pictured in my mind, lol.

 

[Chilly807]

I used the Shop Vac on mine when I changed the filter, the adapter on the end was a perfect fit in the fill point. I got a "little bit" of oil in the hose, maybe 1 oz at most, probably what was in the immediate area of the filler neck.

Sean

 

[like2wheel]

Haven't done mine yet, so I'm not quite sure of the configuration, but I would be concerned that the vacuum method might recirculate some of the debris back off of the stainer.
I can imagine if its sucking fluid away from the hole, it might take some particles with it, and defeat the purpose of the service.

 

[bp fick]

Haven't done mine yet, so I'm not quite sure of the configuration, but I would be concerned that the vacuum method might recirculate some of the debris back off of the stainer.
I can imagine if its sucking fluid away from the hole, it might take some particles with it, and defeat the purpose of the service.

I doubt it. The vacuum is just sufficient to not allow the fluid to flow out the hole created by removing the screen.

For the fluid to drain out the hole, make up air must replace it by entering through the dipstick/fill hole. The vacuum is merely preventing make up air from entering.

That said, I use a cork. What do I know.:laughing:

 

[Chilly807]

Mine doesn't have any screen, just the filter with the magnetic ring.

Sean

 

[jimmer2880]

1*I would have replaced the udt with Sudt when I changed the filter.
2*No you need an antifreeze formulated especially for diesels.

just wanted to be sure that you saw the part about using antifreeze espeically formulated for diesels. There is a difference.

 

[poldies4]

just wanted to be sure that you saw the part about using antifreeze espeically formulated for diesels. There is a difference.

I saw that, thanks to all for the info, and I would not have known to look for antifreeze for diesels. Lucky for me now I do...:thumbsup:

FWIW I'm going with the cork method next time. I could just see my shop vac storing those fumes and making my house smell like trans fluid after the next service.

 

[OrangeRidge]

You'd have been better off changing the HST fluid and forgetting
the filter ; it's 35 micron and not that efficient . The trans requires
a high through-put ( 25l/min ) for a small system , and back pressure
is not good . This is why SUDT is used , to reduce hydro-pump pressure.

 

[Chilly807]

So, what IS the difference between diesel and gas engine anti-freeze? I've heard this before, but never explained.