Tube assembly
assembly instructions
The tube has to be cut with a tube cutter by 90°. A maximum deviation of 10° is allowed. The tube end must be free of marks, burrs, stickers etc.
Assembly of tube Push-In is performed manually by hand without the need of special tooling. The tube Push-In is performed in one easy and simple Push-In operation.
Details during tube push-in sequence:
- Passing the Environmental seal O-ring
- Passing the grip ring
- Passing the Main Seal O-ring and reaching the mechanical stop at the bottom of the coupling
Pull back the tube by hand to secure the assembly. Customer decision depending on the criticality level of the application.
All Push-In couplings have a one-time distinctive feedback signal to verify correct assembly of the tube.
The maximum required tube push-in forces are shown in table 3.
Approx. 2/3 of the given values is serial standard.
A marking for visual control of the push-in length is optional. The Push-In length is mentioned in Table 3. In cases the tube is not pushed in correctly, and only passing the grip ring (see above), a measurable controlled leakage will occur. An audible whistle can be heard to locate. Depending on the dimension the tube can be repushed under pressure, to secure a 100% assembly.
For connections between chassis and axle it is recommend using the tube size ≤ 12×1,5
Table 3
| Tube | Push-in length | Max. push-in force4 |
|---|---|---|
| 4×1 | 17,2 mm (0,72 in) | 70 N (15,7 lbf) |
| 6×1 | 19,5 mm (0,77 in) | 80 N (18,0 lbf) |
| 8×1 | 20,5 mm (0,81 in) | 90 N (20,2 lbf) |
| 10×1; x1,25; x1,5 | 24 mm (0,94 in) | 100 N (21,5 lbf) |
| 12×1,5 | 25 mm (0,98 in) | 110 N (24,7 lbf) |
| 14×2 | 25 mm (0,98 in) | 120 N (27,0 lbf) |
| 15×1,5 | 27 mm (1,06 in) | 125 N (28,1 lbf) |
| 16×2 | 27 mm (1,06 in) | 130 N (29,2 lbf) |
| 18×2 | 27 mm (1,06 in) | 130N (29,2 lbf) |
| 1/8” | 19,5 mm | 80 N (18,0 lbf) |
| 3/8” | 23,5 mm | 100 N (21,5 lbf) |
| 1/2″ | 25,5 mm | 110 N (24,7 lbf) |
| 5/8” | 27,5 mm | 130 N (29,2 lbf) |
| 3/4″ | 27,5 mm | 130 N (29,2 lbf) |
- Tube diameter, tolerances, ovality and cutting quality may affect the Push-In force