Buy 149200-1820 ZEXEL 1 468 434 028 BOSCH HYDRAULIC HEAD 1468434028 1492001820

Disassembly and Reassembly of General Parts
Oil seals
When driving oil seals into place, follow the instructions below: Driving Seals into Housing:(a) Place the seal lip correctly. Make sure it is not damaged.(b) Before driving a seal into place, apply a light coat of grease to the periphery of the seal that fits into the housing.(c) Use a driving tool like the one shown in the illustration that is specifically designed for the purpose. The tool can properly guide the lip and hold evenly the top of the seal when it is tapped, so it allows the seal to be driven straight down. Do not use hammers on bare seals as seal will be damaged.
Oil seal driving tool Driving Seals onto Shaft:(a) Coat the seal lip with grease.(b) Use seal guide like the one shown in the illustration when the shaft has steps, splines, threads or keyways.
Oil seal guideO-Rings
Use a guide when it is necessary to move O-rings over steps, splines, threads or keyways to install them. Apply a light coat of grease to O-rings before fitting them.
O-ring guideBearings
(1) When driving bearing into place, be sure to tap the race that is being fitted. (If the inner race is being fitted, tap the inner race. Likewise, if it is the outer race that is being fitted, tap the outer race.)Use fitting tools like the ones in the illustration that are appropriate for inner or outer races.
Bearing fitting tool(2) Bearings are best fitted using a press as shock loads and errors can be minimized.
Fitting bearing using a pressLock Plates
Always bend lock plates properly. The illustration on the right show some of typical lock plates being bent properly and improperly.
Typical lock plates with good and bad bendsSplit Pins and Spring Pins
As a rule, all split pins must be replaced with new ones after each removal. It is also important to bend split pins properly. Spring pins must be driven into place completely.