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Mercury 1990 100hp Lower unit HELP!
Mercury 1990 100hp Lower unit HELP!
I have a 1990 Mercury 100hp... the Lower unit seized cause fishing line got in my seal! no oil..the driveshaft still turns the bearrings are all toast so have it opened.. taken the prop shaft out and bearrings but I cannot get the DRIVESHAFT removed ..the nut at the bottom has been removed the pinnion gear is still on.... how do i remove the driveshaft.. it just wont pull out the top of the lower unit... the instructions in the SELOC online manual seem to just say pull shaft out??? confused? should i hammer and apply force..?? someone told me to try the following.... The pinion is seated on the shaft, without a drive shaft holder you will have to place the drive shaft in a vise use cushion jaws if you have them and don't clamp on a surface that you can't clean up if you damage it next take a hardwood block and place it on the lower units upper mating surface as close to the drive shaft as possible and hit it with a 3# hammer to dislodge the pinion gear TRIED THIS BUT STILL WON'T MOVE..what is holding it????????????????? these are the instructions.....! 22. Select a box end wrench the same size as the pinion nut. This tool will be used to prevent the nut from turning as the driveshaft is rotated. Obtain a Driveshaft Holding Tool (#C-91-56775). 23. Install the holding tool onto the end of the driveshaft. Now, with the box end wrench on the pinion gear nut, use an appropriate wrench and rotate the tool and driveshaft counterclockwise until the pinion gear nut is free. 24. Remove the nut and the pinion gear assembly. Set aside the old pinion gear nut. The manufacturer recommends the nut not be used a second time. Once the nut has been removed it loses its designed locking characteristics. The old pinion nut will be temporarily installed on the driveshaft for shimming and backlash calculations, and then removed and discarded. 25. Obtain and position a Universal Puller Plate (#C-91-37241) between the pinion gear and the tapered roller bearing. Place the puller plate and gear, with the gear on the bottom, in an arbor press. Use a suitable mandrel and press the gear free of the bearing. The mandrel must contact the gear collar, but clear the bearing cage. Once the bearing has been removed, it cannot be used a second time. The roller cage will be distorted during the removal process. 26. Pull the driveshaft up and out of the lower unit housing. |
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