driveshaft grease point

[gnj588d]

I do my greasing regular, but i am just changing the rear motor mount and discovered a grease nipple at the front
of the driveshaft above the motor mount support plate its rotated to the top at the moment,my question is how do i get
at with my grease gun it cannot be done with the support plate in position,seems like a great deal of work to do at regular intervals.
I do not think any garage would remove the support plate and jack up the transmission to get at one grease nipple  
any advise would be great.Many thanks.Mike. My car is a 1966 230 auto

[gnj588d]

Panic over, just noticed an access port in the support plate

[Mike K]

I had exactly the same issue this weekend. I put my arm into the larger rear-most  access port, and inserted the grease gun nozzle through the smaller forward-most access port.
This way I was able to hold and push the nozzle directly in line with the grease nipple, and no grease squirting all over the place.

This one's a real pain in the backside to do......!!!

[gnj588d]

Thanks Mike, thats a handy tip.Cheers .Mike

[jerrycastillo]

Any pictures of the procedure? I am having a hard time finding the greasing nipple. Many thanks!!

[WRe]

Hi,
just rotate the drive shaft until you reach the grease nipple through the hole of the motor supporting plate.
...WRe

[wwheeler]

There should also be a relief check opposite the grease fitting. This spring loaded check will squirt out grease when the cavity is full. Keep filling until grease appears at the this valve. Typically, nobody services this fitting and is dry. Mine took 20 + pumps to fill, but now just one or two pumps during regular intervals.

[ja17]

Go carefully with the grease. Often the sponge rubber seal on the nose of the driveshaft is left off during repairs. This seal looks useless, but it is meant to keep grease from traveling forward during the greasing process. When this happens, grease will extrude out the end of the centering flange and onto the rubber flex disc. Grease will shorten the life of the flex disc.

[Benz Dr.]

Good info Joe. The check valve is actually another grease jerk that's screwed in from the inside of the drive shaft. There are actually two rubber seals that hold grease in this area; one is the thick rubber ring that fits on the output shaft of the trans and the other one is an O-ring that fits around the back side of the three holed flange. If either is missing grease will fly out of this area until some of the pressure is released. 

[wwheeler]

The check valve on my W111 is a replaceable part that is screwed into the shaft similar to the fitting. #122 997 00 87, not sure if they are still available but were a couple of years ago. Like the fitting, it has threads on one end but is flat just above the hex. Joe is certainly correct about the grease and the check valve will only function if the seals are in place. If you see grease coming out onto the flex disc, good chance the seal is missing or is damaged.