Chapter II Technical Information of Engine
Great Wall Baoding Internal Combustion Engine
Manufacturing Company Limited
39
and wirings are firmly connected, replace them if any
blowout found.
(5) Wash the incrustation in the pipe of cooling system
and radiator.
(6) Wash the vent system of crankcase.
Fig. 2-8-7 Checking the cylinder head gasket
Fig. 2-8-8 Checking the air intake manifold
pipe gasket
Fig. 2-8-9 Checking the exhaust manifold
pipe gasket
2.4 Third Level Technical Maintenance
Under the normal circumstance, in addition to the second
level technical maintenance, replace the timing belt,
inspect the transitional wheel and tension wheel and
clean the cooling system of the complete machine after
the diesel engine runs for 1000 h or the vehicle travels
for 50000 ~ 100000 km (normally per 80000
km).According to the operating condition of the diesel
engine, the following maintenance items should be
carried out if necessary:
(1) Unpick and wash the diesel engine, remove carbon
deposit, oil dirt and incrustation, and wash all lubricating
oil pipes and oil tubes.
(2) Check the wear conditions of the valves, hydraulic
adjuster and contact face of rocker arm, repair or replace
them if necessary.
(3) Check the wear conditions of the piston ring, cylinder,
connecting rod small end bushing and connecting rod
bearing shell, replace them if necessary.
(4) Check the wear conditions of the main shaft bearing
shell and thrust plate.
(5) Check the cam driving mechanism, the sealing
condition of the camshaft front oil seal and the axial
clearance of camshaft, and the transitional wheel
subassembly and tension wheel subassembly.
(6) Check the wear condition of the intake/exhaust
valves and their valve seats, repair and grind the parts,
and check leakage of the parts, replace them if
necessary.
(7) Check the oil pump, overhaul or measure the
vulnerable parts, and adjust them.
(8) Check the cylinder head gasket and intake/exhaust
manifold pipe gasket (see Fig. 2-8-7, Fig. 2-8-8 and Fig.
2-8-9), the damaged or faulty gasket should be replaced.
(9) Check the generator and starter (see Fig. 2-8-10),
wash various parts and bearings, fill them with new
grease after they are dried, check the wear condition of
the starter gear and check if the driving device is flexible.
2.5 Seasonal Technical Maintenance
(1) It is recommended to replace the antifreeze/antirust
fluid in the diesel engine cooling system as the winter is
coming, see Fig. 2-8-11.
Cylinder head
gasket
Cylinder body
Cylinder head
Mounting
assembly
Air intake manifold
pipe gasket
Air intake
manifold pipe
Cylinder head
Mounting assembly
Air intake
manifold
pipe gasket
Air intake
manifold pipe