7.When removing the labyrinth seals, note the position of the anti-rotation button located on the inside of the top half of the seal. Pull up the garter spring surrounding the ¯oating labyrinth seal and carefully slip out the top half. Rotate the garter spring until the lock is visible. Twist counterclockwise to disengage the lock, remove the garter spring, then rotate the lower half of the seal out of the groove in the bearing housing while noting the orientation of the oil drain holes. Note the condition of these ¯oating labyrinth seals. If they are cracked or chipped, they must be replaced. Do not attempt to reuse a damaged seal.
8.To remove the bottom bearing half, the shaft must be raised a slight amount to relieve pressure on the bear- ing. On the rear end, this can be done by jacking or lift- ing on the shaft extension. (Care must be taken to pro- tect the shaft from damage.) On the front end, jacking or lifting can be done using bolts threaded into the tapped holes provided in the shaft end.
NOTE: Lift only enough to free the bearing; over- lifting the shaft can cause difficulty in removing the bearing.
9.Roll the bottom bearing half to the top of the shaft jour- nal and then lift it using suitable eyebolts threaded into the holes provided. Again, avoid any contact with the shaft shoulders that could damage the bearing thrust faces. Place the lower bearing half on a clean, dry surface to protect the parting surfaces.
Use extreme care when rolling out the lower bear- ing half. Keep the hands and ®ngers well clear of any position where they might be caught by the bear- ing half if it were accidentally released and rotated back to its bottom position. Serious personal injury could result.
10.Protect the shaft journal by wrapping it with clean, heavy paper or cardboard.
Reassembly Ð Bearing reassembly is basically a reversal of the disassembly procedures outlined above, with the follow- ing additional steps.
Curil-T is the only approved compound for use in the assembly of the bearings on this motor. Other products may harden and impede the operation.
During the reassembly of the bearing parts, a thin layer of Curil-T should be applied to all gasketed and ma- chined interface surfaces. This suggestion does not ap- ply to the machined surfaces of the bearing liner halves.
When seating the bearing shell, apply a thin layer of lubricating oil at the spherical surface of the liner. Slowly roll the lower bearing liner into the bearing housing mak- ing sure that the split surfaces of the liner and the hous- ing are ¯ush. Gradually lower the shaft onto the bear- ing. The weight of the shaft will help rotate the bearing liner so that the babbitt surface of the liner will match the slope of the journal. Sometimes it is necessary to use a rubber mallet to tap lightly on the bearing housing while slowly rolling the shaft to help this seating operation.
1.The interior of the bearing housing should be cleaned and then ¯ushed with clean oil or kerosene.
2.The bearing halves and the shaft journal should be wiped clean using lint-free cloth soaked with clean oil.
3.All parts should be carefully inspected for nicks, scratches, etc., in any contact surfaces. Such imperfections should be removed by an appropriate method such as stoning, scraping, ®ling, etc., followed by thorough cleaning.
4.Apply a few drops of oil to the journal and bearing saddles.
5.Roll the bottom half of the bearing into place and lower the shaft.
6.Before installing the ¯oating labyrinth seal halves, ob- serve their condition. Do not attempt to use a cracked or chipped seal. The bottom half seal has a set of drilled holes in its side face. These must be placed at the bot- tom toward the inside of the bearing so that accumu- lating oil may drain back into the housing.
7.Put a small bead of Curil-T around the bottom seal half outside diameters on both sides adjacent to the garter spring groove. This prevents oil from bypassing the seal around its outside.
8.Place the bottom seal half on top of the shaft (ensuring that the proper orientation of the drain holes is pro- vided) and roll it into position. Install the top half of the seal making sure that the anti-rotation button is located in the proper position on the inboard side of the bearing. Insert the garter spring pulling up on both ends to per- mit engaging the lock. Run a small bead of Curil-T around the outside diameters on both sides adjacent to the gar- ter spring groove on this half also.
9.Carefully reassemble the two oil ring halves. Inspect the dowel pins for burrs and straightness and make any cor- rections required. Do not force the ring halves together. Excessive force may alter the roundness or ¯atness of the ring which can change its oil delivery performance. Apply locking compound to the oil ring screws prior to reassembly.
10.Assemble the top half of the bearing liner making sure that the match marks on the liner halves align with one another. Failure to ensure alignment of match marks can cause misalignment and possible damage to bearings and journal surfaces. Reinstall any split bolts, if supplied, between the bearing halves.
11.Some of the pipe plugs in the housing are metric thread type and have a copper, lead, or similar material washer. If these plugs are removed, be careful not to lose the washers. Before reassembly, inspect the washers and re- place them if required.
12.Before installing the bearing cap, observe the position of the ¯oating labyrinth seal. The ``tab'' must be on top to engage the pocket. Failure to position the seal prop- erly will result in damage when the cap is assembled.
13.Carefully lower the bearing housing cap over the ¯oat- ing seals. Keep the bearing cap level to avoid binding and possibly damaging the seals. The bearing cap should seat evenly on the bearing housing base.
Do not force the bearing cap down. Damage could occur to the labyrinth seals.
If the bearing cap does not seat completely, remove and reset the ¯oating labyrinth seal position. When install- ing upper bearing cap, the ¯oating labyrinth seals some- times rotate and the anti-rotation ``tab'' does not seat in its holder, thus preventing the bearing housing from seat- ing properly. This procedure should be repeated until the bearing cap seats properly.
