1976 OM616 Pilot bearing install - PeachParts Mercedes-Benz Forum

79Mercy · #1 12-01-2013, 10:52 AM

Well my old 4 speed tranny was making noise in 1st gear so i pulled it out and went to install another known good 4 speed and couldnt get it to slide on.

Turns out that when i took the old tranny out the pilot bearing fell out. strange right.

Anyways i guess ill need to pull the pressure plate and clutch out and flywheel maybe, i dont know yet, to install a new pilot bearing. my question is do i need a special tool to install a new pilot bearing?

Thanks

Diesel911 · #2 12-01-2013, 12:12 PM

Of course Merceds has a Special Tool for that.

I have not read of anyone using the Special Tool so you must be able to do it with something else.

Autozone I believe has a Free Rental that has different sized Discs that attach to a Punch Handle. However, you need to be careful that the Nut that holds the Disc on does not bugger up the inside of the Bearing.

I suppose a Socket on an Extensio would also work if the Socket fits properly.

Whatever you use proceed with care.

charmalu · #3 12-01-2013, 12:50 PM

I had the Pilot Bearing fall out when I was swapping in a different 4-spd also. I couldn`t get the replacement one in, it kept hitting something. Shined a flashlight into the Clutch hole, and there it was laying there.

Had to remove the pressure plate and Disk, and reinstall it. Think I used a Socket of the appropriate size to tap it back in.
You may not need a new bearing.

You do not have to remove the Flywheel.

Charlie

79Mercy · #4 12-01-2013, 01:01 PM

Thanks for the help, i think im going to install a new pilot bearing cause i was getting some noise from one of the bearings before pulling the tranny so hopefully a new release bearing and pilot bearing should take care of the noises. Thanks

Diesel911 · #5 12-01-2013, 01:23 PM

If it is noisey when you first start to apply the Clutch the Release/Throw Out Bearing is the Casue.

If you are in Neutral and you are hearing noise with the Clutch Pedal released it is the Input Shaft Bearing or the Pilot Bearing or both.

charmalu · #6 12-01-2013, 02:14 PM

I just replaced the Clutch assy and input shaft and countershaft bearings in my Nissan PU.

The release bearing was dry, sounded like when washing out a bearing and then spinning it in your hand.

If you have a bad Transmission Bearing, then the trans has to come apart.

The Nissan bearings were easy to source online, there are rebuild kits available also. The bearings were easy to cross reference

Not sure how difficult it would be to source the MB Bearings online or if they are only available from the Dealer or Classic Center in Irvine.

If you are going to the trouble to Drop the Trans to just replace the Release Bearing, it just might be time to replace the other Clutch parts.

Charlie

Stevo · #7 12-01-2013, 02:38 PM

The pilot bearing can be allot harder to get out than put back in, but not in your case. I just use a socket of the appropriate size to tap it in evenly. There should be a cupped shaped steel gizmo with a hole for the tranny input shaft that holds the bearing in place. Sometimes its not there for one reason or another.

charmalu · #8 12-02-2013, 12:06 AM

Quote:

Originally Posted by Stevo

The pilot bearing can be allot harder to get out than put back in, but not in your case. I just use a socket of the appropriate size to tap it in evenly. There should be a cupped shaped steel gizmo with a hole for the tranny input shaft that holds the bearing in place. Sometimes its not there for one reason or another.

Steve, doyou have a part number for that Gizmo? I have see a picture of a couple of them and one in a portland PNP last July in a 81 240D.
Usually the thing is not there in all the transmissions I have pulled. W123, W124 or W201.

None of the online suppliers show it in their catalogs.

Charlie

Stevo · #9 12-02-2013, 12:52 AM

Quote:

Originally Posted by charmalu

Steve, doyou have a part number for that Gizmo? I have see a picture of a couple of them and one in a portland PNP last July in a 81 240D.
Usually the thing is not there in all the transmissions I have pulled. W123, W124 or W201.

None of the online suppliers show it in their catalogs.

Charlie

I'll take a look tomorrow and see if I can find it. I wonder why its sometimes not there? Seems odd that it wouldn't re reinstalled with any work done in the past.

Stevo · #10 12-02-2013, 11:06 AM

Quote:

Originally Posted by charmalu

Steve, doyou have a part number for that Gizmo? I have see a picture of a couple of them and one in a portland PNP last July in a 81 240D.
Usually the thing is not there in all the transmissions I have pulled. W123, W124 or W201.

None of the online suppliers show it in their catalogs.

Charlie

Charlie, A quick look through the 114/123 tranny manual didn't come up with any mention of it. Theres a picture of it in the end of the crank with the F/w on page 03.4-410-3 of the engine service manual. The parts list I have doesn't show it. I'll dig around more this afternoon. Gota get the winter tires on this morning.