Doosan 12/154, Operation & Maintenance Manual

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68 MAINTENANCE
12/154
Replacement of the coupling head or the towing eye
To be carried out ONLY by skilled service personnel.
Disassembly
To remove the coupling (1), the cable tie (48) must be removed.
Withdraw the bellows (36) from the coupling head (1) and remove the
protection caps (4). Unscrew the fixing nuts (3) and remove the bolts
(2). The coupling head (1) may now be removed. If the bellows (36) is
damaged, it must be replaced.
Assembly
Before mounting, all the new and removed parts have to be
lubricated in accordance with regulation SK70003 . Attach the shaft of
the coupling head (1) onto the drawtube (45) and adjust until the holes
overlap. Insert both bolts (2). Screw on new fixing nuts (3) and fasten
them with a torque wrench (Bolt M12 to 77 ± 5Nm, Bolt M14 to 125 ±
5Nm). Replace the protection caps (4). Slide the bellows (36) onto the
coupling head (1). The rear bolt (2) must be covered by the bellows
(36). Secure the bellows (36) with a new cable tie (48).