I pulled a set of front rotors from a 77 300D that are in pretty good condition, close to new. so I pulled them along with the Hubs. with the 50% sale last weekend, they were $13 each.

I pulled them, dropped the outside wheel bearing in a bag, marked which side they came off.

So today Iam cleaning the parts, washing the grease out of the bearings to repack them. they look in ok condition.

then it hit me, in my rush to pull the rotors, i forgot to mark the rotors, right and left.

How much of a problem would it be if I got the out side bearing mixed up on which side they go on.?

Charlie

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there were three HP ratings on the OM616...

1) Not much power
2) Even less power
3) Not nearly enough power!! 240D w/auto

Anyone that thinks a 240D is slow drives too fast.

80 240D Naturally Exasperated, 4-Spd 388k DD 150mph spedo 3:58 Diff

We are advised to NOT judge ALL Muslims by the actions of a few lunatics, but we are encouraged to judge ALL gun owners by the actions of a few lunatics. Funny how that works

Let's see, you have over 4,000 posts. And I got a way less.

When I did my bearings I found the cost of bearings from a nationwide
cheap store to be very , very reasonable. So replacement would
not cause too much trouble.
But to really get at the idea of reversing rotation or even mixing up races
and bearings.

Personally, I would do it. If the bearing is clean and healthy, greased
and properly installed it really should not be a problem.

But I am not a metallurgist, but I know one and will ask him what he thinks
about stress under continous rotational force and then reversing that rotational force.

__________________
80 300D 340K Owned 30 yrs
83 300SD 440K Owned 9 yrs - Daily Driver 150mi/day
02 Z71 Suburban 117,000
15 Toyota Prius 2600 miles
00 Harley Sportster 24k
09 Yamaha R6
03 Ninja 250

I guess he'll talk more about wear - and how misshaped bearing surfaces would fit together...

__________________
1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!

Yes, but you have been here longer.

Iam just being lazy and though for a quick R&R on the 240D, I could clean them up, grease the bearings and some new seals, I would be Golden.

The Rotors on the 240 are worn down with a good size ridge on the edge, and the face is grooved from years of use. this is the way I got them 16 months ago from the original owner. things are shot, and when I was at PNP rapeing the yard on the 50% sale they had, saw these almost new rotors.

Best thing to do is swap the Rotors to the 240 hubs like I should have started to do in the first place.

There is that thread that came up yesterday asking about the thickness of the front pads. there is a cut off around 1980 where they went to the thicker pads and larger Calipers. I need to see where the 240 falls in with early or later pads. I have 3 sets of new pads I got off e-bay a few yrs ago, but for the 85. thought this was an easy job. need to do some mor home work here.

Charlie

__________________
there were three HP ratings on the OM616...

1) Not much power
2) Even less power
3) Not nearly enough power!! 240D w/auto

Anyone that thinks a 240D is slow drives too fast.

80 240D Naturally Exasperated, 4-Spd 388k DD 150mph spedo 3:58 Diff

We are advised to NOT judge ALL Muslims by the actions of a few lunatics, but we are encouraged to judge ALL gun owners by the actions of a few lunatics. Funny how that works

They might work, or they might fail. You might get them rematched correctly, or you may not. The two sets of possibilities are somewhat independent, although I suspect a mismatch is more likely to cause a failure than a correct match.

I'd just go ahead and replace the bearings & races now because I wouldn't want to risk having them fail catastrophically on the freeway. I also I don't like having to do any repair job twice, but that's me (there's always something else I need to repair somewhere).

__________________
'83 300DTurbo http://badges.fuelly.com/images/smallsig-us/318559.png

Broadband: more lies faster.

All the years I have repacked wheel bearings, I have never mixed them up, then I haven`t pulled any rotors with the hubs from PNP either.

I was being so careful to place each outside bearing in a sandwich bag and mark which side I pulled it from. just forgot to mark the rotor.
It wasn`t until I was washing up the parts yesterday it hit me, OH crap, you dumb ####.

I was in a hurry, PNP was closing in an hour, and I needed to pull the rotors and 2 doors. load it on my wheel barrow and do the balancing act w/o it all falling off working my way back to the front.

I probably just use the 240`s hubs and swap in these rotors when I do the brakes next week.

You guys have my permission to kick my @$$ for the dumb idea>

charlie

__________________
there were three HP ratings on the OM616...

1) Not much power
2) Even less power
3) Not nearly enough power!! 240D w/auto

Anyone that thinks a 240D is slow drives too fast.

80 240D Naturally Exasperated, 4-Spd 388k DD 150mph spedo 3:58 Diff

We are advised to NOT judge ALL Muslims by the actions of a few lunatics, but we are encouraged to judge ALL gun owners by the actions of a few lunatics. Funny how that works

Charlie,
The biggest problem would be if the bearings were not identical.

The cup/cone angles are a concern.
If they are OEM bearings, same brand, same numbers, I would probably give it a go.
Often on large bearings you only replace the cup or the cone, not always both.

__________________
Grumpy Old Diesel Owners Club group

I no longer question authority, I annoy authority. More effect, less effort....

1967 230-6 auto parts car. rust bucket.
1980 300D now parts car 800k miles
1984 300D 500k miles
1987 250td 160k miles English import
2001 jeep turbo diesel 130k miles
1998 jeep tdi ~ followed me home. Needs a turbo.
1968 Ford F750 truck. 6-354 diesel conversion.
Other toys ~J.D.,Cat & GM ~ mainly earth moving

Agree with this.


On another note...
Thread title :



So what is the worst case scenario here? Buying new bearings, or beasrings, what ever. I'd go for it, grease up the old ones and go for it. The absolute worst case you buy new and do the job again.

Did you take a close look at the races? Any markings that would clearly show a matched set? Couldn't hurt.

Either way, throw it together and see what happens. My guess is that is will be fine.

__________________
83 300TD (need rear wiper assembly dead or alive)
84 300SD Daily driver
85 300TD almost 400k miles and driven daily.
98 E300D *sold
86 300SDL *sold and made flawless 10 hour journey to new home.

Yes I realise there is an "S" in the word Bearing. for what ever reason I accidently hit the letter. I do not have Spell Check. after I submitted the thread, I saw my Boo Boo and went back to edit it. but you can`t fix the title for what ever reason after it is submitted.

The title does get your attention.

some good points mentioned, rotational direction, cup/cone angles differences between brands.

These bearings are not the same brand. one inner bearing is made in Germany, and the other made in the USA. the outer bearings have no name on them, so I`ll just junk them.

Thank you for the feed back.

Charlie

__________________
there were three HP ratings on the OM616...

1) Not much power
2) Even less power
3) Not nearly enough power!! 240D w/auto

Anyone that thinks a 240D is slow drives too fast.

80 240D Naturally Exasperated, 4-Spd 388k DD 150mph spedo 3:58 Diff

We are advised to NOT judge ALL Muslims by the actions of a few lunatics, but we are encouraged to judge ALL gun owners by the actions of a few lunatics. Funny how that works

You have a 50/50 chance of getting it right. Better than roulette!

__________________
1982 240D 313,000 (4 speed)
1984 300CD 172,483
1985 German Shepherd Dog -Lacey- R.I.P.11/04/05

Hood Stars, Wrist Crowns and Obsession Dobs