The timing gears are stamped with timing marks in
order to ensure the correct assembly of the gears.
When the No. 1 piston is at top center compression
stroke, the teeth that are stamped on the crankshaft
gear and the camshaft gear will be in alignment with
the idler gear.
The crankshaft gear turns the idler gear which then
turns the camshaft gear and the gear for the engine
oil pump.
The fuel injection pump is mounted in the cylinder
block. The fuel injection pump is operated by lobes
on the camshaft. The fuel transfer pump is located on
the right hand side of the cylinder block. The fuel
transfer pump is also operated by lobes on the
camshaft.
The fuel injection pump conforms to requirements for
emissions. Adjustments to the fuel injection pump
timing and high idle should only be made by trained
personnel. The fuel injection pumps have mechanical
governors that control the engine rpm.
A gerotor oil pump is located in the center of the idler
gear. The engine oil pump sends lubricating oil to the
main oil gallery through a pressure relief valve and an
engine oil filter. The rocker arms receive pressurized
oil through an externally located oil line that runs from
the main oil gallery to the cylinder head.
Coolant from the bottom of the radiator passes
through the belt driven centrifugal water pump. The
coolant is cooled by the radiator and the temperature
is regulated by a water temperature regulator.
Engine efficiency, efficiency of emission controls, and
engine performance depend on adherence to correct
operation and maintenance recommendations.
Engine performance and efficiency also depend on
the use of recommended fuels, lubrication oils, and
coolants. Refer to the Operation and Maintenance
Manual, “Maintenance Interval Schedule” for more
information on maintenance items.
Engine Specifications
Note: The front end of the engine is opposite the
flywheel end of the engine. The left and the right side
of the engine are determined from the flywheel end.
The No. 1 cylinder is the front cylinder.
402C-05 Engine
Illustration 16 g01108476
(A) Exhaust valves
(B) Inlet valves
Table 1
402C-05 Engine Specifications
Maximum Operating Speed
(rpm)
3600 rpm
Cylinders and Arrangement In-Line two cylinder
Bore 67 mm (2.64 inch)
Stroke 72 mm (2.83 inch)
Displacement 0.507 L (30.939 in
3
)
Aspiration
NA
(1)
Compression Ratio
23.5:1
Firing Order
1-2
Rotation that is viewed from the
flywheel
Counterclockwise
Valve Lash Setting (Inlet) 0.20 mm (0.008 inch)
Valve Lash Setting (Exhaust) 0.20 mm (0.008 inch)
(1)
Naturally Aspirated
SEBU7992-05
19
Product Information Section
Engine Description
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