ar3110p8000rt

Remove/install trailer hitch

Type ar · topic 31.10 · version 0305 · 2015-07-11

Applies to: Model 251.0/1 with code 550 (Trailer coupling)

Where it sits

Function group 2 Chassis › 31 Frame, trailer operation › 31.10 Trailer coupling, fifth-wheel coupling — Series 251 (models 0**, 1**)

EinPAS 35 Body/frame/detachable parts › 35.60 Trailer hitch › 35.60.30 Trailer hitch/trailer coupling — Series 251 (models 0**, 1**)

AR31.10-P-8000RT

Remove/install trailer hitch

7.7.15

Model

251.0/1

with code 550 (Trailer coupling)

Remove/install trailer hitch

Illustration shows trailer hitch with CODE 494 (USA version)

1

Cross member

2

Longitudinal member reinforcement

3

Longitudinal member reinforcement

5

Bolts

13

Bolts

15

Nuts

P31.11-2442-06

Danger !

Risk of death caused by vehicle slipping or toppling off of the lifting platform.

Align vehicle between vehicle lift columns and position the four support plates at the vehicle lift support points specified by the vehicle manufacturer.

AS00.00-Z-0010-01A

Notes on self-locking nuts and bolts

AH00.00-N-0001-01A

Remove

1

Remove trim from spare tire well

AR68.30-P-4620RT

2

Lift vehicle on vehicle lift

AR00.60-P-1000RT

3

Remove rear bumper

AR88.20-P-2200RT

Danger !

Risk of injury. Skin or eye injuries may result when handling hot or glowing objects.

Wear protective gloves, protective clothing and safety glasses, if necessary.

AS00.00-Z-0002-01A

4

Detach brackets of rear mufflers from body and lower rear mufflers

Danger !

Risk of injury caused by scraping or cutting body parts on sharp vehicle parts

Always wear protective gloves when working on or near sharp and non-deburred vehicle parts.
Deburr repair panels.

AS00.00-Z-0017-01A

5

Detach heat shield above left and right rear muffler until nuts (15) of longitudinal member reinforcements (2, 3) are accessible

6.1

Remove trailer hitch socket and detach trailer hitch wiring harness from crossmember (1)

MODEL 251.0/1 except CODE 460 (Canada version) except CODE 494 (USA version) except CODE 496 (Mexico version)

AR31.19-P-1350RT

6.2

Disconnect electrical connector from trailer hitch socket and detach trailer hitch wiring harness from crossmember (1)

MODEL 164.1/8 with CODE 460 (Canada version) MODEL 164.1/8 with CODE 494 (USA version) MODEL 164.1/8 with CODE 496 (Mexico version)

7

Remove screws/bolts (13)

8

Unscrew nuts (15)

Before the last nuts (15) are unscrewed, the aid of a helper is required in order to prevent the crossmember (1) from falling down.

9

Remove crossmember (1)

Helper required.

10

Remove screws/bolts (5) of longitudinal member reinforcements (2, 3)

11

Remove longitudinal member reinforcements (2, 3)

Install

12

Install longitudinal member reinforcements (2, 3)

13

Screw on screws/bolts (5) of longitudinal member reinforcements (2, 3) finger-tight

14

Place crossmember (1) on longitudinal member reinforcements (2, 3)

To prevent the crossmember (1) from falling down, the aid of a helper is required to screw on the first nuts (15).

15

Screw on nuts (15) of crossmember (1) finger-tight

16

Screw in screws/bolts (13) finger-tight

17

Align longitudinal member reinforcement (2, 3) and crossmember (1) so that they are free of tension

18

Tighten nuts (15) to specified torque

Nut, trailer hitch to crossmember

*BA31.11-P-1002-01H

19

Tighten screws/bolts (5) to specified torque

Bolt, reinforcement arm to vehicle floor

*BA31.11-P-1001-01H

20

Tighten screws/bolts (13) to specified torque

Bolt, trailer hitch to reinforcement arm

*BA31.11-P-1004-01H

21.1

Attach trailer hitch socket and secure trailer hitch wiring harness to crossmember (1)

MODEL 251.0/1 except CODE 460 (Canada version) except CODE 494 (USA version) except CODE 496 (Mexico version)

AR31.19-P-1350RT

21.2

Connect electrical connector to trailer hitch socket and secure trailer hitch wiring harness to crossmember (1)

MODEL 251.0/1 with CODE 460 (Canada version) MODEL 251.0/1 with CODE 494 (USA version) MODEL 251.0/1 with CODE 496 (Mexico version)

Danger !

Risk of injury caused by scraping or cutting body parts on sharp vehicle parts

Always wear protective gloves when working on or near sharp and non-deburred vehicle parts.
Deburr repair panels.

AS00.00-Z-0017-01A

22

Secure heat shield over left and right rear muffler

23

Raise rear mufflers and attach brackets of rear mufflers

Bolt, bracket for outer exhaust rubber mount to bracket for bumper

*BA49.10-P-1008-01X

24

Install rear bumper

AR88.20-P-2200RT

25

Install trim for spare tire well

AR68.30-P-4620RT

Check

26

Perform function check on ball neck and light signals at trailer hitch socket

AN31.10-P-0008-01A

Trailer coupling mechanism

Number

Designation

Model 251

BA31.11-P-1001-01H

Bolt, reinforcement arm to vehicle floor

M10

Nm

66

M12

Nm

130

Trailer coupling mechanism

Number

Designation

Model 251

BA31.11-P-1002-01H

Nut, trailer hitch to crossmember

Nm

66

Trailer coupling mechanism

Number

Designation

Model 251

BA31.11-P-1004-01H

Bolt, trailer hitch to reinforcement arm

Nm

120

Exhaust system

Number

Designation

Engine 113.971 in model 251

Engine 156 in model 251

BA49.10-P-1008-01X

Bolt, bracket for outer exhaust rubber mount to bracket for bumper

Nm

18

18

Exhaust system

Number

Designation

Engine 272, 273, 276 in model 251

ENGINE 642 in MODEL 251 except CODE 928/U42

BA49.10-P-1008-01X

Bolt, bracket for outer exhaust rubber mount to bracket for bumper

Nm

18

18

Referenced documents