B32.20-0125-09
1 | Pneumatic assembly (bellow) | 8 | Fastening nuts (pneumatic assembly) | |
2 | Support crossmember bracket | 9 | Self-locking nuts | |
2.1 | Support crossmember | 10 | Bracket for lift bellows | |
3 | Top bracket | 11 | Longitudinal members | |
4 | Auxiliary axle | 12 | Pneumatic pressure connector | |
5 | Self-locking nuts | A | Pressurized auxiliary axle (raised axle - seen from the rear of the vehicle) | |
6 | Bolts | B | Depressurized auxiliary axle (lowered axle - seen from the left of the vehicle) | |
7 | Regulation nuts | C | Adjusting measurement (with depressurized shaft) |
Danger | Risk of death caused by improper lifting of cab. Risk of injury caused by body parts being trapped and crushed when lowering cab | Only used approved lifting cradles. Ensure that the mounts are securely seated. Stay out from underneath a hanging cab. | |
Warning | Risk of injury from cutting pressurized compressed air lines | Wear protective gloves and safety glasses | |
Topical note | Notes on self-locking nuts and bolts | ||
Notes on compressed air connection systems | |||
| Remove | ||
1 | Fully lower the auxiliary axle (4) | Turning off compressed air supply. | |
2 | Disconnect the disconnect switch or negative cable from battery | On vehicles with electronic engines, observe the recommended instructions. | |
3 | Release the pneumatic pressure connector (12) | | |
4 | Remove the fastening nuts (8) | ||
5 | Remove the brackets for lift bellows (10) | ||
6 | Remove the top bracket (3) | ||
7 | Remove the support crossmember bracket (2) from the longitudinal members (12) | Only if necessary | |
Remove the self-locking nuts from (5) screws (6) and their flat washers. | |||
| Clean | ||
8 | Clean all the components | If reusing the pneumatic assembly (1): | |
| |||
Clean it with a clean, dry cloth, without any liquid or solvent. | |||
| Check | ||
9 | Check the components condition | Check the condition of the threads for all bolts, clamps and stud bolts integrated into the assembly. | |
Always replace the self-locking nuts. | |||
If any component shows signs of damage and/or oxidation: | |||
| |||
Replace the component. | |||
| Install | ||
10 | Install the pneumatic assembly (1) on the support crossmember (2.1) | Secure with lower fastening nuts (8). | |
Do not torque it. | |||
11 | Install the top support (3) | Secure with upper fastening nuts (8). | |
Upper beam nut to the bellows | |||
12 | Install the support crossmember bracket (2.1) to the longitudinal members (11) | With the support crossmember bracket (2.1) mounted to the pneumatic assembly (1). | |
Introduce the self-locking nuts to the (5) crossmember fastening bolts, the bolts (6) and their flat washers. | |||
Apply torque to the self-locking nuts of the crossmember fastening bolts (5). | |||
Bellows support attachment | |||
Support attachment on the frame rail | |||
13 | Install the brackets for lift bellows (10) | ||
14 | Connect the pneumatic pressure connector (12) | Remove the plugs from the compressed air connectors. | |
15 | Connect the disconnect switch or negative cable from battery | On vehicles with electronic engines, observe the recommended instructions. | |
Run the engine until the compressed air line reaches working pressure. | |||
| Check | ||
16 | Check leaks in the pneumatic assembly (1) | Lift and lower auxiliary axle 7 to 8 times in order to accommodate components. | |
| Measure | ||
17 | Check measure (C) | If measure (C) is not within the prescribed range: | |
| |||
Loosen the fastening nuts (8) and use the adjusting nuts (7) to adjust. Then, apply the prescribed torque. | |||
Adjust lift bellow bracket during repair and maintenance | |||
Adjustment measure between the bellows arch and the auxiliary shaft | |||
Upper nut for locking the bellows arch | |||
| Check | ||
18 | Check the tightening torque of fastening nuts (8) and self-locking nuts (9). |
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