Kymco MO MXU250 Service Manual - chap14 (ruota e sosp ant sterzo)

14. FRONT WHEEL/FRONT SUSPENSION/

STEERING SYSTEM

MXU 250

14

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FRONT WHEEL/

FRONT SUSPENSION\STEERING SYSTEM

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SERVICE INFORMATION------------------------------------------------ 14- 2

TROUBLESHOOTING----------------------------------------------------- 14- 2

FRONT WHEEL------------------------------------------------------------- 14- 3

FRONT WHEEL HUB------------------------------------------------------ 14- 4

FRONT SUSPENSION ----------------------------------------------------- 14- 8

TIE-ROD---------------------------------------------------------------------- 14-14

HANDLEBAR --------------------------------------------------------------- 14-17

STEERING COLUMN------------------------------------------------------ 14-20

14-0

14. FRONT WHEEL/FRONT SUSPENSION/

STEERING SYSTEM

MXU 250

14-1

14. FRONT WHEEL/FRONT SUSPENSION/

m

d

⎯2 (

)

⎯2 (

)

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⎯

⎯

STEERING SYSTEM

MXU 250

SERVICE INFORMATION

GENERAL INSTRUCTIONS

• Jack the machine front wheel off the ground and be careful to prevent the machine from falling
down.

• During servicing, keep oil or grease off the brake disk

• Inspect the brake system before riding.

SPECIFICATIONS Unit: mm (in)

Ite

Front wheel rim run out

Tie rod length 299.5±0.5(11.98±0.02
Rod-end (tie rod) angle 180

TORQUE VALUES

Steering stem nut 7 kgf-m (70 Nm, 50 lbf-ft)
Front swing arm nut 4.5 kgf-m (45 Nm, 32 lbf-ft)
Front wheel nut 4.5 kgf-m (45 Nm, 32 lbf-ft)
Front wheel hub nut 7 kgf-m (70 Nm, 50 lbf-ft)
Steering knuckle nut 3.5 kgf-m (35 Nm, 25) lbf-ft)
Front shock absorber upper
mount bolt 4 kgf-m (40 Nm, 29 lbf-ft)
Front shock absorber lower

Radial

Axial

º

Standar

Service Limit

0.08

0.08

mount bolt 4 kgf-m (40 Nm, 29 lbf-ft)

SPECIAL TOOLS

Oil seal and bearing install E014

TROUBLESHOOTING

Hard steering (heavy) Front wheel wobbling

•Insufficient tire pressure • Bent rim

• Bent spoke plate

• Faulty tire

Steers to one side or does not track straight • Improperly tightened axle nut

• Uneven front shock absorbers Soft front shock absorber

• Bent front arm • Weak shock springs

• Bent steering knuckle • Insufficient damper oil

Front shock absorber noise

• Slider bending

• Loose arm fasteners

• Lack of lubrication

• Excessive wheel bearing play

14-2

14. FRONT WHEEL/FRONT SUSPENSION/

N

STEERING SYSTEM

FRONT WHEEL

REMOVAL AND INSPECTION

Place the machine on a level place.
Remove four nuts attaching the front wheel
hub and front wheel.

Elevate the front wheels by placing a
suitable stand under the frame.

＊

Support the machine securely so
there is no danger of it falling over.

MXU 250

uts

Measure the wheel run out.
Replace wheel or check bearing play if out
of specification

Rim run out limits:

Vertical: 2 mm (0.08 in)

Lateral: 2 mm (0.08 in)

INSTALLATION

When reinstalling a wheel, tighten the
wheel nuts in a crisscross (rather than a
circular) pattern.

Torque: 4.5 kgf-m (45 Nm, 32 lbf-ft)

＊

Be sure the tapered side of the wheel
nuts face the wheel rim.

14-3

14. FRONT WHEEL/FRONT SUSPENSION/

Nut

r

r

N

STEERING SYSTEM

FRONT WHEEL HUB

REMOVAL AND INSPECTION

Place the machine on a level place.
Remove the front wheel (Ö14-3) and
caliper. (Ö13-9)
Elevate the front wheels by placing a
suitable stand under the frame.

＊

Support the machine securely so
there is no danger of it falling over.

Remove the nut cap.

Remove the cotter pin.
Remove nut from the front wheel hub and
then remove front wheel hub.

DISASSEMBLY

Remove the outside collars.
Inspect the dust seals for wear or damage.
If any defects are found, replace the dust

seal with a new one.

ut Cap

Outside Colla

MXU 250

Cotter Pin

Dust Seal

Remove the dust seals by a flat-head screw
driver.

＊

Place a wood block against the outer
edge to protect this edge.

Outside Colla

Dust Seal

14-4

14. FRONT WHEEL/FRONT SUSPENSION/

STEERING SYSTEM

Inspect the bearings for allow play in the
front wheel hub or the wheel turns roughly.

If any defects are found, replace the
bearings

MXU 250

Bearing

Bearing

Remove the bearings using a general
bearing puller.

14-5

14. FRONT WHEEL/FRONT SUSPENSION/

r

r

STEERING SYSTEM

Remove the distance collar from the front
wheel hub.

ASSEMBLY

Install the left new bearing and dust seal
into the front wheel hub.

MXU 250

Distance Colla

Special

Oil seal and bearing install E014

＊

Apply the grease onto the oil seal lips,

bearing.

Install the distance collar.

＊

Be sure the tapered side of the distance

collar face the wheel.

Distance Colla

14-6