Model | 374.602/655/682/685 |
with trailer hitch | |
Model | 375.1 |
with trailer hitch | |
Model | 375.3 |
with trailer hitch | |
Model | 930, 932, 933 |
with trailer hitch | |
Model | 940, 942, 943 |
with trailer hitch | |
Model | 950, 952, 953 |
with trailer hitch | |
Model | 957.5/6 |
with trailer hitch | |
Model | 970, 972, 975, 976 |
with trailer hitch |
N31.10-0254-01
N31.10-0255-01
N31.10-0256-01
1 | Safety knob |
2 | Hand lever |
3 | Coupling jaw |
4 | Coupling bolt |
5 | Clutch body |
6 | Check pin |
7 | Release lever |
5 | Clutch body |
B31.10-0002-01
N31.10-0325-01
N31.10-0326-01
2 | Hand lever |
3 | Coupling jaw |
8 | Pilot bushing |
A | Inside diameter |
9 | Wear plate |
N31.10-2026-01
| Check | ||
1 | Close trailer hitch | If the version differs, observe the manufacturer's specifications. | |
Use a suitable tool, which will vary according to the version, to close the hitch. | |||
For comfort trailer hitch | |||
| |||
Perform further maintenance operations according to manufacturer's specifications, subject to separate repair order. | |||
2 | Turn rotating coupling jaw (3) to left and right as far as it will go, and release it at each end position | The rotating coupling jaw (3) must swivel back automatically into the center position. | |
3 | Pull out safety knob (1) and rotate through approx. 45° to lock in place | For version with snap button (1). | |
4 | Lift coupling bolt (4) using hand lever (2) | The coupling bolt (4) must lock automatically in the raised position and the coupling jaw (3) should be secured in the center position. | |
5 | Push coupling bolt (4) up using a suitable tool or operate release lever (7) | This action must release the coupling bolt (4) from its catch and latch it into the lower bearing bore. | |
6 | Check pivot bearing of clutch body (5) for longitudinal and vertical clearance | Longitudinal clearance is not permissible. | |
Clutch body bearing | |||
7 | With trailer hitch closed, push coupling bolt (4) up using a suitable tool | The permissible vertical clearance must not be exceeded. | |
Coupling bolt | |||
8 | Measure coupling bolt (4) on crowned part longitudinally and transversely using a vernier caliper or gauge | The measurement must not be below the minimum; the gauge must not be able to slide over. | |
Coupling bolt | |||
9 | Measure inside diameter (A) of lower pilot bushing (8) | The maximum dimension must not be exceeded. | |
Pilot bushing | |||
10 | Check condition and wear of wear plate (9) or supporting ring | The towing lug must not touch the lower pilot bushing (8). | |
11 | Check bolts securing trailer hitch to cross member and cross member to frame are fitted securely |
Check values for trailer hitch, trailer coupling, fifth wheel coupling |
Number | Designation | MODEL 374.6, 375.4, 940, 942, 943, 944 with trailer hitch for 40 mm towing eye | MODEL 374.6, 375.4, 940, 942, 943, 944 with trailer hitch for 50 mm towing eye | ||
BE31.10-N-1001-01B | Coupling bolt | Vertical clearance | mm | 4,0 | 4,0 |
Ø | mm | 36,5 | 46,5 |
Check values for trailer hitch, trailer coupling, fifth wheel coupling |
Number | Designation | MODEL 375.3, 930, 932, 933, 934, 950, 952, 953, 954 with trailer hitch for 40 mm towing eye | MODEL 375.3, 930, 932, 933, 934, 950, 952, 953, 954 with trailer hitch for 50 mm towing eye | ||
BE31.10-N-1001-01B | Coupling bolt | Vertical clearance | mm | 4,0 | 4,0 |
Ø | mm | 36,5 | 46,5 |
Check values for trailer hitch, trailer coupling, fifth wheel coupling |
Number | Designation | MODEL 375.1, 970, 972, 974, 975, 976 with trailer hitch for 40 mm towing eye | MODEL 375.1, 970, 972, 974, 975, 976 with trailer hitch for 50 mm towing eye | ||
BE31.10-N-1001-01B | Coupling bolt | Vertical clearance | mm | 4,0 | 4,0 |
Ø | mm | 36,5 | 46,5 |
Check values for trailer hitch, trailer coupling, fifth wheel coupling |
Number | Designation | MODEL 374.6, 375.4, 940, 942, 943, 944 with trailer hitch for 40 mm towing eye | MODEL 374.6, 375.4, 940, 942, 943, 944 with trailer hitch for 50 mm towing eye | ||
BE31.10-N-1002-01B | Clutch body bearing | Vertical clearance | mm | 2,0 | 2,0 |
Longitudinal play | mm | 0,0 | 0,0 |
Check values for trailer hitch, trailer coupling, fifth wheel coupling |
Number | Designation | MODEL 375.3, 930, 932, 933, 934, 950, 952, 953, 954 with trailer hitch for 40 mm towing eye | MODEL 375.3, 930, 932, 933, 934, 950, 952, 953, 954 with trailer hitch for 50 mm towing eye | ||
BE31.10-N-1002-01B | Clutch body bearing | Vertical clearance | mm | 2,0 | 2,0 |
Longitudinal play | mm | 0,0 | 0,0 |
Check values for trailer hitch, trailer coupling, fifth wheel coupling |
Number | Designation | MODEL 375.1, 970, 972, 974, 975, 976 with trailer hitch for 40 mm towing eye | MODEL 375.1, 970, 972, 974, 975, 976 with trailer hitch for 50 mm towing eye | ||
BE31.10-N-1002-01B | Clutch body bearing | Vertical clearance | mm | 2,0 | 2,0 |
Longitudinal play | mm | 0,0 | 0,0 |
Check values for trailer hitch, trailer coupling, fifth wheel coupling |
Number | Designation | MODEL 374.6, 375.4, 940, 942, 943, 944 with trailer hitch for 40 mm towing eye | MODEL 374.6, 375.4, 940, 942, 943, 944 with trailer hitch for 50 mm towing eye | ||
BE31.10-N-1003-01B | Pilot bushing | Inside Ø | mm | 31,2 | 34,2 |
Check values for trailer hitch, trailer coupling, fifth wheel coupling |
Number | Designation | MODEL 375.3, 930, 932, 933, 934, 950, 952, 953, 954 with trailer hitch for 40 mm towing eye | MODEL 375.3, 930, 932, 933, 934, 950, 952, 953, 954 with trailer hitch for 50 mm towing eye | ||
BE31.10-N-1003-01B | Pilot bushing | Inside Ø | mm | 31,2 | 34,2 |
Check values for trailer hitch, trailer coupling, fifth wheel coupling |
Number | Designation | MODEL 375.1, 970, 972, 974, 975, 976 with trailer hitch for 40 mm towing eye | MODEL 375.1, 970, 972, 974, 975, 976 with trailer hitch for 50 mm towing eye | ||
BE31.10-N-1003-01B | Pilot bushing | Inside Ø | mm | 31,2 | 34,2 |