Remove/install front axle

AR33.10-B-0100A

Remove/install front axle

04.08.2020

Front axle

732.510, 733.840/880 in model 688

Front axle

733.840/880 in model 685, 688

Modification notes

02.01.2012

New torque for wheels nuts

Chassis 688.1/2

31.01.2019

Porca no grampo da mola do eixo dianteiro

BA32.20-B-1001-01A

05.06.2019

Hydraulic brakes fluid

BF42.00-B-1001-01A

1

Shock absorber

11

Stabilizer clips

2

Fastening elements

12

Bearing support

3

Flexible brake hose

13

Stabilizer

4

Flexible hose clamping strip

14

Counter part

5

Fastening screw sensor connector of brake wear pads

15

Anti-roll bar fastening nuts

6

Sensor connector of brake wear sensor

16

Terminal

7

Wear sensor of brake pads

17

Terminal castle nut

8

Clamps

18

Cotter pin

9

Clips support

19

Holder

10

Clip nuts

 

Remove/install

1

Chock the rear wheels and apply the parking brake

2

Loosen the front wheel fastening nuts

3

Lift the vehicle and support it on easels under chassis. Keep lightly axle supported on the jack

4

Remove the front wheels

.

AR40.10-B-1100F

 After having covered the first 50 to 100 km, re-tighten the wheel fastening nuts

 .Wheels nuts

*BA40.10-B-1001-03B

5

Remove the pads wear sensor (7)

Hydraulic brake

AR42.10-B-0090-02A

Replacing and installing brake padsPneumatic brake

AR42.10-B-0170C

6

Remove the flexible brake hose (3) on both sides and close up its end to prevent leakage or ingress of dust

 Installation: (only hydraulic brake) Bleed the brake system

Brake fluid, DB supply specification 7760.30 (DOT 4)

*BR00.45-Z-1110-06A

 .Hydraulic brakes fluid

*BF42.00-B-1001-01A

7

Remove the steering bar (16) of the steering column

.

AR46.40-B-0100-01A

8

Remove the front axle shock absorbers (1)

9

Loose the fastening (11, 12, 14, 15) of the stabilizer bar (13) and remove it

10

Loose the nuts (10) and remove the "U" bolts (8) of the leaf spring (9)

 Installation: Check the clips threads of the leaf spring fastening, if necessary, repass the threads with screw-die
After the first 50-100 km traveled, retighten the clamp nuts

 .Spring Clip nut on front axle

*BA32.20-B-1001-01A

11

Go down the axle, remove and put it on easel

 Easels for front axles - EE-020

 Installation: Grease the guide screw and the hole of the support base on the beam
When installing the axle, note that the screw guide head of the leaf spring fits correctly into the hole base of axle girder support.

Grease, 6820.20

*BR00.45-Z-1109-06A

12

Disconnect the connecting bar from the connecting arms

.

AR46.40-B-0200-01A

 For chassis 688.1/2: Observe the torque for the new wheels nuts (flat) valid only for wheels with stamped holes (plain). The old nuts were tapered and valid with wheels with tapered drilling.Ball joints castle nut for the tie-rod

*BA46.40-B-1001-01A

13

Install in reverse order

 Installation: After installation of the axle, the vehicle must be subject to a complete adjustment of the turning angle and wheels alignment.

 Metallic suspension on the front axle

Number

Designation

Chassis 688

BA32.20-B-1001-01A

Spring Clip nut on front axle

M12x1.5

Nm

100

M14x1.5

Nm

140

M16x1.5

Nm

-

M24x2

Nm

New clamps

M18x1.5

Nm

-

Maintenance - retightening

Nm

M20x1.5

Nm

-

M24x1.5

Nm

-

 Disc wheels

Number

Designation

Type 688.1/2

BA40.10-B-1001-03B

Wheels nuts

Nuts from 02/01/2012 - hub centering

M18x1.5

Nm

320

Tapered nuts 31/12/2011 - centering by washers

M18x1.5

Nm

250

 Connecting rod

Number

Designation

Type 688 with front axle 732.510

BA46.40-B-1001-01A

Ball joints castle nut for the tie-rod

M18x1.5

Nm

120...140

M20x1.5

Nm

-

M24x1.5

Nm

-

M27x1.5

Nm

-

 Supply quantity, brake system

Number

Designation

Vehicles 688.1 with vacuum assisted brake system

Vehicles 688.1 with compressed air actuated brake system

BF42.00-B-1001-01A

Hydraulic brakes fluid

Approximate level

Litros

1,0

1,5

Fluid class

Consultar documentos AH00.40-B-0001-01MBD, AH00.40-B-0001-01MBK e AH00.40-B-0001-01MBL no site Mercedes-Benz / Guia de Lubrificantes

Consultar documentos AH00.40-B-0001-01MBD, AH00.40-B-0001-01MBK e AH00.40-B-0001-01MBL no site Mercedes-Benz / Guia de Lubrificantes

Repair materials

Number

Designation

Order number

BR00.45-Z-1109-06A

Grease, 6820.20

Use corresponding commercially available repair materials.

BR00.45-Z-1110-06A

Brake fluid, DB supply specification 7760.30 (DOT 4)

Use corresponding commercially available repair materials.