Lubricate and check operation of trailer hitch with detachable ball neck

AP31.11-P-3121BA

14.2.11

MODEL 124, 129, 140, 202 with CODE (550) Trailer hitch
with bumper filler for detachable ball neck

P31.11-0003-01

Arrows Diameter of coupling ball

P31.11-0007-01

P31.11-0008-01

8 Cover

Arrow Pin

Modification notes

20.1.11

Lubricate coupling ball, added

Operation step 6

1	Remove bumper filler
2	Remove ball neck from vehicle	If ball neck and ball neck mounting are dirty, as a separate repair order:
		Clean trailer hitch with detachable ball neck after checking	AP31.11-P-3130Z
3	Check diameter of coupling ball	  The ball neck must no longer be used if it measures less than the minimum size.	*BE31.11-P-1001-01A
4	Check ball neck for damage	 If there are problems, the ball neck must no longer be used.	AP31.11-P-3121-01BA
5	Check function of ball neck	 If there are problems, the ball neck must no longer be used.	AP31.11-P-3121-02BA
6	Lubricate ball neck, coupling ball, mortise lock and ball neck mounting		AP31.11-P-3121-03BA
		MB multipurpose grease	*BR00.45-Z-1034-06A
7	Clip in cover (8)
8	Install pin (arrow)
9	Put ball neck in storage bag and place in trunk
10	Mount bumper filler

Test values for trailer hitch

Number	Designation		All models


BE31.11-P-1001-01A	Minimum diameter of ball head	mm	49

Repair materials

Number	Designation	Order number
BR00.45-Z-1034-06A	MB multipurpose grease	A 001 989 34 51 10