Great Wall engine 4G64S4M. Manual — part 5
11-14
8EN0066
ENGINE
TIMING TOOTHED-BELT WHEEL
MD998785
6EN0636
MD998778
6EN0637
MD990767
MD998719
6EN0668
In case water or grease is found on these parts, check the front
cover oil-seal, camshaft oil-seal and water pump to see if there
exist leakage.
DISASSEMBLY OF BALANCING SHAFT TOOTHED-
BELT WHEEL
(1)
Fasten balancing shaft toothed-belt wheel with the tools as
shown in the figure.
(2)
Disassemble the balancing shaft toothed-belt wheel.
DISASSEMBLY OF CRANKSHAFT TOOTHED-BELT
WHEEL B
(1)
In case difficult to disassemble due to adhesion, use special
tools.
DISASSEMBLY OF CAMSHAFT TOOTHED-BELT
WHEEL BOLT
(1)
Fasten camshaft timing toothed-belt wheel with special tools.
(2)
Disassemble camshaft toothed-belt wheel bolt.
F
G
H
CHECK
TIMING TOOTHED-BELT WHEEL
Carefully check each part of the toothed-belt and replace a new
toothed-belt in case of the following damages:
(1)
The back rubber is aged and glistened, no trail left after scraping
with a finger nail, and no elasticity;
11-15
ENGINE
TIMING TOOTHED-BELT WHEEL
(2)
There are cracks on the surface of back rubber;
(3)
There are cracks and peel-off on the surface of canvas
(4)
There are cracks at the bottom of the tooth
(5)
There are cracks on the side face of toothed-belt
(6)
The side face of toothed-belt is abnormally abraded. The normal
situation is the side face is as level as being cut with a sharp knife
(7)
Abnormal abrasion on the tooth surface.
(8)
Teeth broken off.
AUTOMATIC TENSIONER
(1)
Check automatic tensioner to see if there is leakage and replace
with a new one if necessary.
(2)
Check if there is abrasion or damages on the rod end and replace
with a new one if necessary.
cracks
canvas peel-off
side cracks
crack at bottom of tooth
1EN0249
belt margin roueded
abnormal abrasion (heat yarn of belt emposed)
8EN0067
canvas abrased ,rubber exposed
belt teeth broken off
8EN0068
6EN0280
11-16
ENGINE
TIMING TOOTHED-BELT WHEEL
12mm
6EN0161
98~196N
rod
displacement
6EN1033
brass or aluminum vice jaw
cock
tieplate
brass or aluminum vice jaw
6EN1030
MD990767
6EN0669
MD998719
spacer
oil seal
chamfer
balancing
shafe
BEN0615
(3)
The overhang length of measuring rod. Replace if not conform
to standard.
Standard value
12mm
(4)
Measure the amount of displacement while pressing down the
rod with a force of 98~196N.
(5)
Replace the automatic tensioner if the displacement of rod is at
least 1mm lesser than the value as measured in item (3).
Standard value
1mm
(6)
Clamp automatic tensioner with a soft jaw plier.
Notes:
Because there is screw-plug outshot at the bottom of automatic
tensioner, a flat bearing plate should be inserted between the
plier and the screw-plug to avoid them from direct contacting.
(7)
Rotate handle of plier to thrust in the rod of automatic tensioner.
Replace automatic tensioner if it can be easily thrusted in.
Certain resistance should be apperceived while thrusting in.
NOTES FOR MOUNTING
TIGHTENING OF CAMSHAFT TOOTHED-BELT
WHEEL BOLT
(1)
Fixup camshaft toothed-belt wheel with special tools.
(2)
Tighten the camshaft toothed-belt wheel bolt to the specified
torque.
MOUNTING OF SPACER
(1)
While mounting the spacer, the side with chamfer should be
towards oil-seal.
A
B
11-17
ENGINE
TIMING TOOTHED-BELT WHEEL
TOOTHED-BELT WHEEL
(1)
Fixup balancing shaft toothed-belt wheel with the tools as
shown in the figure.
(2)
Tighten the bolt to the specified torque.
MOUNTING OF TIMING TOOTHED-BELT B
(1)
Align the marks of crankshaft toothed-belt wheel B and
balancing toothed-belt wheel separately.
(2)
Mount timing toothed-belt onto the crankshaft toothed-belt
wheel B and balancing shaft toothed-belt wheel. The
tensioning side should remain tightened.
(3)
Ensure that the centers of tensioner wheel and the bolt are as
shown in the figure.
(4)
While applying force to the tensioner side of timing toothed-
belt with your finger, move tensioner B in the direction of the
arrow. At this moment, screw up the bolt to fixup tensioner
B. Don
t let the shaft rotate together with toothed-belt
wheel thus while screwing up the bolt, otherwise the toothed-
belt will be too tight.
(5)
Confirm to align the mark on the toothed-belt with the mark
on the front cover
(6)
Press down the central part of the tensioner side of timing
toothed-belt B with your forefinger. The toothed-belt is to be
pressed down by 5~7mm.
D
C
MD998785
6EN0636
timing
mark
front cover
timing mark
DEN0602
6EN0571
tensioner B
tensioner
center
bolt center
6EN0572
timing
mark
displacement being
pressed down
6EN0573
timing
mark
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст