Perkins — Perkins 4.108 4.107 4.99 Diesel Engine Workshop Manual

TIMING CASE AND DRIVE-J.S To Remove the Camshaft and Tappets plates as illustrated in Fig. J.14. 8. Ease the camshaft out from the back and catch the two thrust plates as they come out of their recess in the cylinder block. 9. Withdraw the camshaft as shown in Fig. J.10 taking care to ensure that the cams and journals are not damaged during this operation. 10. The tappets may now be removed by lifting them out of their locations (Refer to Fig. J.12) or by removal of the retaining clips if the engine is still the normal way up. 11. Examine camshaft and tappets for signs of exces- sive wear, surface cracks, pitting etc.

To remove the camshaft it may be necessary to remove the engine from the vehicle or application and place in a suitable dismantling stand where it can be turned upside down. The purpose of this is to prevent the tappets from falling out of their locations when the camshaft is removed. If however, it is not possible to turn the engine over in this manner, then this problem may be overcome by attaching suitable clips (when the tappet inspection cover has been removed) to each tappet to hold them in their locations when the cam- shaft is withdrawn from the block. 1. Remove the engine from the vehicle or application and mount in a suitable dismantling stand (where available) correct way up. 2.

Remove the cylinder head cover, rocker shaft and push rods. 3. Remove the timing case front cover and timing gears. 4. Remove the fuel lift pump, tappet inspection cover and fuel pump operating push rod. 5. Turn the engine over so that the sump is now uppermost: NOTE: At this stage if it is not possble to turn the engine over then the tappets should be lifted to the top of their locations and secure with suitable clips. 6. Remove the sump and lubricating oil pump assem- bly. (Refer to Page L.1 for details of their re- moval). 7. Remove the timing cover back plate as previously detailed this will show the camshaft and thrust J10 2 4. J11 1. Drive Hub 2. Lubricating Oil Pump Drive Gear 3.

Groove for reduced oil pressure feed to Rocker Shaft 4. Bearing Journals