Great Wall Hover. Manual - part 73

Brake-13

Check the component of front brake

1. Measure the thickness of the brake block bush.

standard thickness:   9.0mm

minimum thickness:   2.0mm

It should replace the brake block if less than minimum thickness or

has uneven abrasion.

2. Measure the thickness of the brake disc.

standard thickness:   26.0mm

minimum thickness:   24.0mm

It should repair or replace the brake disc if the brake disc is damaged

or worn or its thickness is

less than minimum thickness.

3. Measure the circular runout of the brake disc.

Remarks: It should ensure that the bearing is adjusted correctly

before the measurement .  maximum circular runout :   0.11mm

4. Replace the brake disc if necessary.

a. Remove the tong bracket form the steering knuckle.

b. Remove the hub and brake disc.  (Refer to section “Front hub”)

c. Install the new brake disc; tighten the connecting bolt to the

specified torque.

Tightening force:   90

100N

m.

d. Install the hub and brake disassembly.  (Refer to section “Front

hub”)

e. Install the tong bracket on the steering knuckle; tighten the

connecting bolt to the specified torque.

Tightening torque 140

10N

m.

Brake-14

Assembly of brake pump

1. Preparation work

All components should be washed, dried by wind and without foreign

material before the assembly. During the assembly, cost the guide pin

and location pin with proper vacuum silicon based grease; coat the

working surface of piston and square gasket with proper rubber

lubricant.

2. Install the piston gasket in the tong body.

a. Screw the bleed screw into the bleed hole;

tightening torque 7

10N

m.

b. Install the square gasket in the sealing groove of two cylinders of

pump respectively after coat its working surface with proper

rubber lubricant.

3. Install the piston with dustproof cover in the tong

a. Cover the dustproof cover on the piston.

b. Lengthen the dustproof cover to expose the bottom of piston

from the dustproof cover clip ring; use the tool (for example:  steel

wire about 

2mm ) to assist insert the clip ring into the cylinder

hole clip ring groove.

Caution: The used tools must not be sharp to prevent the damage

of dustproof cover.

c. Press the piston to the bottom of cylinder hole by hand.

4. Pre Install the guide pin and location pin on the tong bracket.

a. Install the guide pin dustproof cover on the guide pin and location

pin respectively.

b. Screw the guide pin and location pin in the tong bracket

respectively.

Caution: Do not damage the guide pin dustproof cover.

Brake-15

Installation of brake caliper

1. Install the brake block

2. Install the brake pump

a. Install the brake pump.

b.   Install and tighten the hexagon flange bolt.

Tightening force:   25

35N

m

3. Connect the brake pipeline

Connect the brake oil pipe to the tong body.

Tightening force:   50

5N

m

4. Fill up the brake liquid reservoir with the brake fluid and dis

charge the air in brake system.

5. Check for the leakage of brake fluid.

Caution: Discharge the air after the completion of replacement.

Brake-16

Rear brake  (Disk-and-drum type)

tong bracket

pin rubber cover

 brake caliper locking bolt 100

silencing plate

combination

outside brake block

inside brake block

brake block wearing
indication plate

c y l i n d e r   h o l e
dustproof cover

wire clip

rectangle seal ring

piston

tong body (left)

copper washer

brake oil pipe fastening blot 55

 location pin 25

30

bleed screw

bleed screw dustproof cover

guide pin 25

30

rear brake oil pipeline

N  m:      specified torque

peephole

silencing

plate

Replacement of brake block

Remarks: if the rear wheel generates the cheep during the braking,

it should check the abrasion indication plate of brake block. If the

indication plate has the abrasion mark with brake disc, then it

should replace the brake block .

1. Remove the rear wheel

2. Check the thickness of brake block bush.

Measure the thickness of the brake block bush (abrasion material)

from the eyehole of tong. If the thickness is not within the specified

range, then it should replace the brake block.

minimum thickness:   2.0mm.