Chpter IV Mechanical System
Great Wall Baoding Internal Combustion Engine
Manufacturing Company Limited
129
Fig. 4-1-28 Installation for camshaft bearing
cap
Fig. 4-1-29 Installing the vacuum pump
assembly
specified order, then tighten the surrounding 6 hexagon
flange bolts (M6×20) from the center to both sides. See
Fig. 4-1-27.
Tightening torque for the fastening bolt of camshaft
bearing cap
9 N·
m±3 N·
m
(3) Install the plug cover and the front oil seal of
camshaft: apply an appropriate amount of lubricating oil
onto the front oil seal lip and the cylindrical surfaces of
both front oil seal and camshaft plug cover. Use special
tools to install the front oil seal and plug cover into the
corresponding holes properly without causing any oil
leakage.
Mobil API CI-4 lubricating oil
Reinstalling the vacuum pump assembly
○
13
(1) Install the vacuum pump to the rear end of the
cylinder head exhaust camshaft, with the flat bump of its
bearing inserted into the groove of the rear end of the
cylinder head exhaust camshaft and the rabbet and the
rabbet round hole matched perfectly.
(2) Screw down the 3 hexagon flange bolts (M6×20)
connecting the vacuum pump to the cylinder head to the
specified torque. See Fig. 4-1-29.
(3) Fix the vacuum coupling hose to the vacuum pump.
There should be no deflection or misplacement after
installation.
Tightening torque for vacuum pump fastening bolt
9 N·
m±3 N·
m
Camshaft
bearing cap
Cylinder head
Vacuum pump
assembly
Cylinder head
