CARTRIDGE GP-TURBOCHARGER 7W8426 - Caterpillar

Illustration 1 g00807910
Connections for the two-piece camshaft
(1) Dowel
(2) Spacer
(3) Bolt The engine has two-piece camshafts. Dowel (1) in one section of the camshaft goes through spacer (2) into the other section of the camshaft. The sections are joined by bolts (3). Each camshaft is supported by 11 bearings for the G3520 Engine.As the camshaft turns, each lobe moves a lifter assembly. There are two lifter assemblies for each cylinder. Each lifter assembly moves a pushrod and two inlet valves or two exhaust valves. The camshafts must be timed with the crankshaft. The relation of the camshaft lobes to the crankshaft position cause the valves in each cylinder to operate at the correct time.