Perkins 103-06 Workshop Manual page 10

Gear Train:
The gear train consists of three helical gears; the
crankshaft gear, located by a woodruff key. The idler
gear houses the lube oil pump and the cam gear
incorporates the governor weight cage.
Fuel System:
A flange mounted, Bosch type fuel injection pump is
mounted in the cylinder block and operated by lobes
machined on the engine cam. The fuel lift pump is
located on the right-hand side of the cylinder block and
also operated by the engine camshaft.
Lubricating System:
A trochoid lobe type oil pump located in the centre of
the idler gear sends lubricating oil to the main oil galley
via a relief valve through a spin-on bypass oil filter to the
main oil galley. The rockers are pressure fed via an
externally mounted oil pipe, from the main oil gallery to
the cylinder head.
Cooling System:
A belt driven centrifugal water pump circulates coolant
via the internal water passages. The coolant is radiator-
cooled and temperature controlled by a conventional
thermostat.