Case CX160 - Fuel Connectors

CX210/CX240 ELECTRONIC FUEL SYSTEM
8 - 14
CX EXCAVATORS
FUEL CONNECTORS
The high pressure fuel lines are connected between the injection pump and the left side of
the cylinder head. The injectors are mounted perfectly vertical, from the top of the cylinder
head, at the center of the piston. High pressure fuel flows from the high pressure lines,
through connectors, and into the injectors. The high pressure fuel is sealed at both ends of
the connectors with a tapered metal to metal fit. Because of this metal to metal fit, torque on
the high pressure fuel line fittings at the cylinder head is critical. Insufficient torque can result
in internal and/ or external fuel leakage. Internal leakage will result in poor cylinder
performance but will not be evident because internal leakage flows into the rifle drilled fuel
return passage in the cylinder head and returns to the tank. Excessive torque on the high
pressure line fittings can distort the fuel injector, causing it to stick and malfunction, possibly
causing poor engine performance.
The injector is sealed to the combustion chamber at the base of the injector using a 1.5 mm
thick copper sealing washer. Use of a sealing washer of different thickness results in
improper injector tip protrusion and cause combustion problems.