There are four seals that seal the pump. In theory 2 (1 on each end) keep the gear oil out and the other 2 keep the hydraulic fluid in. When you install the new seals, install all 4 so that the lip of the seal is facing in toward the pump gears. This is a comon rpair. Also change the filter and if the pump end plaes are scored, disssemble the coplete unit and wash everything with good hot soapy water. The pump is designed backwards. There is from 20 to 25% more load on the idler gear than on the drive gear. So make sure to change those bearings as well and they can be a pain to change. If your cener plate is cracked the relief valve is set too high or water is getting in the unit and ice is causing the problem. We at one time probaly took care of 200 Olivers with that style pump and if we sold one centerplate a year we were doing good.
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Today's Featured Article - Timing Your Magneto Ignition Tractor - by Chris Pratt. If you have done major engine work or restored your tractor, chances are you removed the magneto and spark plug wires and eventually reached the point where you had to put it all back together and make it run. On our first cosmetic restoration, not having a manual, we carefully marked the wires, taped the magneto in the position it came off, and were careful not to turn the engine over while we had these components off. We thought we could get by with this since the engine ran perfectly and would not need any internal work. After the cleanup and painting was done, we began reassembly and finally came to t
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