P40.20-0307-01
Center position of steering gear | ||||
055 | Holding device | |||
055b | Mount | |||
10 | Tie rod | |||
10f | Jam nut | |||
N40.20-2047-01
Center position of steering gear |
N40.20-2046-02
030 | Wheel spreader |
P40.20-2034-11
| Check | ||
Danger | Risk of death when working on component parts and systems with U >= 30 V alternating voltage (AC) or U >= 60 V direct voltage (DC) | Do not touch damaged or defective live component parts and lines or non-insulated electrical connections and lines. | |
Topical note | General information on handling vehicles with high-voltage on-board electrical system and/or lithium-ion battery and/or gaseous-fuel drive system | ||
1 | Set zero position of air suspension | Only with code CL0 (Rear lowerable and raisable air suspension) | |
Insert assembly device at rear axle and lower vehicle until it makes contact with the assembly device. The current zero position corresponds to a clinometer angle of 0.82° on the rear axle shaft. | |||
Assembly device | |||
2 | Measure vehicle level at front and rear axles with electronic inclinometer | Toe per wheel at vehicle level: | |
Use the measured vehicle level to look up the specified values for the toe-in on the table sheet and note down these values. | |||
Model 639.6 with code ZG2 (Permanent all-wheel drive)Toe per wheel at vehicle level | |||
Model 639.7/8 with code ZG2 (Permanent all-wheel drive)Toe per wheel at vehicle level | |||
Model 639.6 except code MA0 (E-CELL 60 kW) except code ZG2 (Permanent all-wheel drive)Toe per wheel at vehicle level | |||
Model 639.7/8 except code MA0 (E-CELL 60 kW) except code ZG2 (Permanent all-wheel drive)Toe per wheel at vehicle level | |||
Model 639.6/7 with code MA0 (E-CELL 60 kW)Toe per wheel at vehicle level | |||
Model 639 with code CF8 (Sports suspension)Toe per wheel at vehicle level | |||
3 | Fix steering wheel in center position | ||
Retainer device | |||
4 | Check center position of steering gear and steering wheel | The steering gear is centered when the marking on the cap is aligned with the mark on the control valve housing (arrows). If necessary, move steering wheel by one tooth only. | |
5 | Install wheel spreader (030) | Install wheel spreader (030) at the front on the inside of the wheel. | |
The elastic bearings of the lower transverse control arm and steering linkage produce a correspondingly large toe-in value that is reduced to the correct dimension in curb condition. | |||
6 | Perform wheel alignment check | ||
Compare the toe-in values according to the vehicle level with the actual values measured during the wheel alignment check. | |||
Adjust | |||
7 | Adjust toe | Adjust toe by loosening the jam nut (10f) and twisting the tie rods (10) to the specified value. Check that the bellows are not twisted after adjusting the toe-in. | |
Observe permissible difference in front axle toe-in between right and left sides of the vehicle. | |||
Model 639.6 with code ZG2 (Permanent all-wheel drive)Permitted difference between right and left side of vehicle for front axle toe-in | |||
Model 639.7/8 with code ZG2 (Permanent all-wheel drive)Permitted difference between right and left side of vehicle for front axle toe-in | |||
Model 639.6 except code MA0 (E-CELL 60 kW) except code ZG2 (Permanent all-wheel drive)Permitted difference between right and left side of vehicle for front axle toe-in | |||
Model 639.7/8 except code MA0 (E-CELL 60 kW) except code ZG2 (Permanent all-wheel drive)Permitted difference between right and left side of vehicle for front axle toe-in | |||
Model 639.6/7 with code MA0 (E-CELL 60 kW)Permissible difference in front axle toe between right and left sides of vehicle | |||
Model 639 with code CF8 (Sports suspension)Permissible difference in front axle toe between right and left sides of vehicle | |||
Jam nut, tie rod |
Front axle toe check values |
Number | Designation | Model 639.6 | ||
BE40.20-N-1001-07F | Toe per wheel at vehicle level | +10.6° | | +0° 10' (5') |
+9.6° | | +0° 08' (5') | ||
+8.5° | | +0° 07' (5') | ||
+7.5° | | +0° 06' (5') | ||
+6.5° | | +0° 04' (5') | ||
+5.5° | | +0° 02' (5') | ||
+4.5° | | 0° 00' (5) | ||
+3.5° | | –0° 02' (5') | ||
+2.5° | | –0° 04' (5') | ||
+1.6° | | –0° 07' (5') | ||
+0.6° | | –0° 09' (5') | ||
–0.3° | | –0° 12' (5') |
Front axle toe check values |
Number | Designation | Model 639.6 without code ZG2, with code XZ1 | ||
BE40.20-N-1001-07J | Toe per wheel at vehicle level | +16.4° | | +0° 12' (5') |
+15.3° | | +0° 11' (5') | ||
+14.2° | | +0° 10' (5') | ||
+13.2° | | +0° 08' (5') | ||
+12.1° | | +0° 06' (5') | ||
+11.1° | | +0° 04' (5') | ||
+10.1° | | +0° 02' (5') | ||
+9.1° | | 0° 00' (5) | ||
+8.1° | | –0° 03' (5') | ||
+7.1° | | –0° 06' (5' | ||
+6.1° | | –0° 09' (5') | ||
+5.1° | | –0° 12' (5') |
Check values for front axle toe |
Number | Designation | Model 639.7/8 with code XZ1 except code ZG2 | ||
BE40.20-N-1001-07L | Toe per wheel at vehicle level | +16.4° | | +0° 12' (5') |
+15.3° | | +0° 11' (5') | ||
+14.2° | | +0° 10' (5') | ||
+13.2° | | +0° 08' (5') | ||
+12.1° | | +0° 06' (5') | ||
+11.1° | | +0° 04' (5') | ||
+10.1° | | +0° 02' (5') | ||
+9.1° | | +0° 00' (5') | ||
+8.1° | | –0° 03' (5') | ||
+7.1° | | –0° 06' (5') | ||
+6.1° | | –0° 09' (5') | ||
+5.1° | | –0° 12' (5') |
Front axle toe check values |
Number | Designation | MODEL 639.7/8 with CODE XZ1 with CODE ZG2 | ||
BE40.20-N-1001-07M | Toe per wheel at vehicle level | +10.6° | | +0° 10' (5') |
+9.6° | | +0° 08' (5') | ||
+8.5° | | +0° 07' (5') | ||
+7.5° | | +0° 06' (5') | ||
+6.5° | | +0° 04' (5') | ||
+5.5° | | +0° 02' (5') | ||
+4.5° | | 0° 00' (5') | ||
+3.5° | | –0° 02' (5') | ||
+2.5° | | –0° 04' (5') | ||
+1.6° | | –0° 07' (5') | ||
+0.6° | | –0° 09' (5') | ||
–0.3° | | –0° 12' (5') |
Check values for front axle toe |
Number | Designation | Model 639.6/7 with code XZ1 with code MA0 | ||
BE40.20-N-1001-07O | Toe per wheel at vehicle level | +12,2° | +0° 15' (5') | |
+11,1° | +0° 13' (5') | |||
+10,1° | +0° 11' (5') | |||
+9,1° | +0° 09' (5') | |||
+8,1° | +0° 07' (5') | |||
+7,1° | +0° 05' (5') | |||
+6,1° | +0° 02' (5') | |||
+5,1° | 0° 00' (5') | |||
+4,1° | –0° 03' (5') | |||
+3,2° | –0° 05' (5') | |||
+2,2° | –0° 08' (5') | |||
+1,3° | –0° 11' (5') |
Check values for front axle toe |
Number | Designation | Model 639 with code XZ1 with code CF8 | ||
BE40.20-N-1001-07P | Toe per wheel at vehicle level | +14,4° | +0° 18' (5') | |
+13,3° | +0° 16' (5') | |||
+12,3° | +0° 14' (5') | |||
+11,2° | +0° 12' (5') | |||
+10,2° | +0° 10' (5') | |||
+9,1° | +0° 07' (5') | |||
+8,1° | +0° 05' (5') | |||
+7,1° | +0° 02' (5') | |||
+6,1° | –0° 01' (5') | |||
+5,1° | –0° 04' (5') | |||
+4,1° | –0° 08' (5') | |||
+3,1° | –0° 11' (5') |
639 589 02 23 00
Assembly device
129 589 01 21 00
Retainer device
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