TE20 Gearbox input drive shaft oil seal replacement
After removing the input shaft and housing from the gearbox, remove the shaft from the housing and clean both parts checking the bearing and where the seal runs on the shaft for damage. Remove the old oil seal
and fit the new seal in the housing taking care the seal is in square and properly home in the housing. It is also worth taking some emery to the splined end of the input shaft to remove any sharp edges.
To protect the seal when reassembling it over the splines, wrap part of the shaft and all the splines with insulation tape. With the shaft as in the picture start from the left working to the right, this lets the seal slip
over the tape going with the ridges.
Before fitting the tape, I usually cut an angle on the end of the tape, this lets you know when removing the tape, you have removed it all
Apply grease or oil to the tape covering the input shaft before fitting to the housing with the new seal in, this helps the seal slide down the shaft, with the shaft and housing joined together carefully remove the tape.
Published in Journal 111, Winter 2024, Sandy Donald