Chapter V GW4D20 / GW4D20B Turbocharged Diesel Engine
Great Wall Baoding Internal Combustion Engine
Manufacturing Company Limited
333
Fig. 5-16-27 Installing the vacuum pump
assembly
Fig. 5-16-28 Installing the fuel injector
Fig. 5-16-29 Installing the fuel injector
assembly
(5) Install the vacuum pump assembly.
——Install the vacuum pump at the rear of the exhaust
camshaft, with the flat bump on the shaft inserted into
the groove on the shaft end at the rear end of the
exhaust camshaft and with the rabbet and the rabbet
round hole fitting well.
——Tighten the 2 hexagon flange face bolts (M6×20)
fastening the vacuum pump and the cylinder head to
the specified torque. See Fig. 5-16-27.
——Install the vacuum connecting hose.
There should be no deflection or misplacement
after installation.
Tightening torque for the fastening bolt of vacuum
pump
9N·
m±3N·
m
(6) Install the fuel injector.
——Screw down the supporting bolt of fuel injector
ballast to the cylinder head as specified.
Tightening torque for the supporting bolt of fuel
injector ballast
23N·
m±3N·
m
——Install the copper washer and O-ring of fuel injector
to the fuel injector, and make sure that only one copper
washer is installed to each fuel injector and placed
horizontally.
——According to the numbers 1, 2, 3 and 4 on the fuel
injectors, install the fuel injectors to the fuel injector
mounting holes on the cylinder head corresponding to
cylinders 1, 2, 3 and 4. See Fig. 5-16-28.
——Place one end of the fuel injector ballast on the
ballast supporting bolt and the other end in the fuel
injector ballast groove. See Fig. 5-16-29.
——Install and tighten the fastening bolt assemblies of
fuel injector ballast to the specified torque.
Tightening torque for the fastening bolt component
of fuel injector ballast
25N·
m~35N·
m
After installation, gas leakage at the fuel injector
gasket is forbidden.
Cylinder head
Vacuum pump
assembly
Sectional
view
of cylinder head
Fuel injector assembly
