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Great Wall engine 4G64S4M. Manual - part 15

11-54

6EN0624

arrow mark

ENGINE

CYLINDER HEAD AND VALVE

9EN0477

paint marks

100

6AE0299

6EN0625

Mount of Main Bearing Cap/ Main Bearing Bolt

(1)

Mount the main bearing cap with the arrow mark thereof

directing to the side of timing toothed belt.

(2)

Be sure the length of bolt is less than the limit value before

mounting the main bearing cap bolt. In case it is larger than the

limit value, change the bolt.

Limit value (A): 71.7 mm

(3)

Coat the engine oil on the threaded part and seat face of the

bolt.

(4)

Tighten the main bearing cap bolt with the torque of 25N.m as

per the specified sequence.

(5)

Make paint mark on each bolt head.

(6)

Screw down the paint mark at the position of the main bearing

cap by 90

100forward from the paint mark on bolt.

(7)

Tighten each bolt by 90

100in the above specified se-

quence until the paint marks on the bolts are in alignment with

that on the main bearing cap.

Notice:

If the screwing angle is less than 90, the tightening

property specified is cannot be guaranteed. Therefore,

attention should be paid to the screwing angle when

tightening.

In case the nut is over tightened, (the screwing angle is

more than 100

), loosen it thoroughly, and then re-

tighten it from the Step (1).

(8)

Ensure the crankshaft can rotate smoothly after the main

bearing cap is well mounted, and inspect the axial clearance.

In case the axial clearance exceeds the application limit value,

change the No.3 crankshaft thrusting bearing.

Standard value; 0.05

0.18mm

Limit value: 0.25mm

11-55

ENGINE

CYLINDER HEAD AND VALVE

MD990938

MD998376

6EN0709

6EN0626

Mount of Oil Seal

Mount of Rear Oil Seal Cover

Specified sealant

Brand: Genuine Mitsubishi brand sealant MD970389 or the

equivalents.

Notice:

(1)

The rear oil seal cover should be mounted quickly on the

condition the sealant is not dry (

15 min).

(2)

Keep the sealing area free from the lubricant and coolant for

1 hours or so after the mount.

11-56

ENGINE

AC GENERATOR

DISASSEMBLY AND ASSEMBLY

Disassembly Procedure

generator pulley

rotor assembly

rear bearing

bearing block

front bearing

front cap

stator assembly

retaining plate

adjustor and brush stand

10. brush

11. ring

12. rectifier assembly

13. rear cap

9EN0187

11-57

ENGINE

AC GENERATOR

6EN1774

1EN0300

rectifer

soldering joint

DEL0009

6EN0603

6EN0604

NOTES FOR DISASSEMBLY

SEPARATION OF STATOR AND FRONT CAP

(1)

Insert the screwdriver into the gap between front cap and stator

to separate the front cap from the stator.

(2)

If it is hard to separate them, lightly hit the front cap with a plastic

hammer and prize it with screwdriver at the same time.

NOTES:

Don't insert the screwdriver too deep lest the stator winding

is damaged.

DISASSEMBLY OF GENERATOR PULLEY AND ITS FAN

(1)

With the pulley end upwards, disassemble the pulley after fixing

the rotor with a bench clamp.

NOTES:

Do not damage the rotor.

DISASSEMBLY OF STATOR ASSEMBLY, ADJUSTOR

AND BRUSH STAND

(1)

Knock down the stator with an electric iron (180

250W), such

operation should be finished within 4 seconds lest heat is con-

ducted to the diode.

(2)

While disassembling rectifier from adjustor, burn off the part

welded to the rectifier with the electric iron.

Ensure not to conduct the heat generated by the electric iron

to the diode for a long time.

Do not let the diode pin overburden forces.

CHECK

ROTOR

(1)

Check whether the rotor winding is switched into conduction and

confirm conduction exists between the slip-rings. Measure the

resistance of the rotor. If the resistance is too low, it means the

circuit is shorted . If there exists non-conduction or short circuit,

replace the rotor assembly.

Standard value: 3

0.5

(2)

Grounding of rotor winding. Check if it is insulated between the

slip-ring and iron core, if not, replace the rotor assembly.

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