31.5-100 Retrofitting fifthwheel coupling
Preceding work: Distance between rear axle and fifthwheel coupling point calculated (31.5-095). |
1 | Fifthwheel coupling |
2 | Hexagon bolts replace. |
3 | Plain washers |
4 | Thrust plates |
5 | Lubrication lines (on vehicles with central lubrication system) |
6 | Self-locking hexagon nuts replace, 200 Nm. |
7 | Mounting bracket |
8 | Mounting plate |
9 | Self-locking hexagon nuts (M20 x 1.5) replace, 400 Nm. |
10 | Hexagon bolts replace. |
Commercially available tools
Drilling machine | |
Steady | |
Screw clamps | |
Spiral drill 4, 10 and 16 mm dia. | |
Taper bridge reamer DIN 311 made from HSS
e.g. Stefan Hertweck
GmbH & Co KG
Postfach 13 20
7560 Gaggenau
or
August Beck
Fabrik für Reib- und Senkwerkzeuge
7472 Winterlingen
a Diameter mm | b Length mm | c Nominal diameter mm | d Morse taper size | e Groove length mm | f Total length mm |
14 | 60 | 20 | 3 | 172 | 280 |
Procedure
-------------------------------
The regulations on truck body guidelines are to be complied with.
1 Using screw clamps, fasten mounting plate (8) to the mounting bracket (7) according to the previously calculated distance between rear axle and fifthwheel coupling point.
2 Pre-drill holes in mounting plate (8) and mounting bracket (7) to 16 mm dia. and ream to 20 mm dia. with taper bridge reamer (11).
3 Remove mounting plate (8).
4 Attach fifthwheel coupling (1) with hexagon bolts (2), plain washers (3) and self-locking hexagon nuts (6) on the mounting plate (8),
200 Nm.
5 Place mounting plate (8) with fifthwheel coupling (1) on mounting bracket (7) and tighten using hexagon bolts (10) and self-locking hexagon nuts (9), 400 Nm.
6 Secure mounting plate (8) and fifthwheel coupling (1) at the front and rear using thrust plates (4). Weld on thrust plates (4).
7 On vehicles with central lubrication system:
Connect lubrication lines (5) to the lubrication points.
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