Permitted wear for Towing Hitches and Drawbar eyes

selbsttaetige_Kupplung

Automatic couplings – bearing (turning knuckle)

Gap at turning knuckle:
between funnel and flange collar under light load on the lower tab in driving position: max. 3 mm

Non-automatic couplings – bore

Gap at turning knuckle:
between funnel and flange collar under light load on the lower tab in driving position: max. 3 mm

kupplungsbolzen_1

Automatic couplings – coupling pin

Type

Nominal dimension (mm)

Wear limit min. (mm)

840

38 ± 0,1

36

850

30,6 ± 0,1

28,6

860

38 ± 0,1

36

873

30,6 ± 0,1

34

einhandstecker_1

Diameter

Type

Nominal dimension (mm)

Wear limit min. (mm)

274

30 – 31,5

28

800

30 – 31,5

28

810

30 – 31,5

28

kupplungsbolzen_2

max. 2.5 mm

einhandstecker_2
einhandstecker_3

no deformation of the safety components

max. 6 mm

kupplungsbolzen_3

Wear of the coupling pin or of the bore max. 1,5 mm

koerperbohrung

Non-automatic couplings – bore

Top and bottom in drive position max. 35 mm oval

steckbolzenlager

Insert pin bearing

  • Pin play in the bore max. 3 mm (nominal dimension whennew 0.5 mm)
  • Wear of the pin max. 1.5 mm
  • Wear of the bore 1 mm or vice versa

Lift bearing

  • Play in guideway in push/pulldirection max. 2.4 mm
    (nominal dimension when new 0.4 mm atan installation dimension 330 mm)
  • Wear of the groove in hitch holder max. 1.2 mm
  • Wear in the guideway of the trailerhitch 0.8 mm or vice versa
zugoese

Drawbar eyes

ISO

DIN

b2 max. (mm)

c min. (mm)

e3 min. (mm)

5692-2

11026

41,5

38

22

-

11043

41,5

311

22

8755

74054

41,5

28

22

8755

74054/2 (without bush)

44,0

28

24

1102

74053

52,5

41,5

23,5

5692-1

9678

52,5

27,5

27

1 New dimension in hump area 35 mm
2 Dimension with bush
3 Dimension without bush

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