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lower the hitch loop of the tractor until the support of the drawbar of the semi-trailer rests upon
the ground;
remove the pin connecting the drawbar towing loop of the semi-trailer with the hitch loop of
the tractor.
ATTENTION!
The semitrailer cannot be detached off the tractor if:
the body is lifted;
protection wedges (blocks) are not placed under the wheels.
During the use of the tractor semi-trailer, it is necessary to constantly monitor the condition of the hubs,
wheel rims, and tyres as well as the tightening of wheels and tyre pressure. The tyres should not be cracked
or ruptured.
To tighten the wheels, use a special screwdriver (torque wrench). Select the torque from Table 12, 13
and 13, 14, 15 Picture 8, 9, 10, 11, 12 according to the design of the hub.
Wrench
Number of
(mm)
culumns
17
4 – M 12 x 1,5
19
5 – M 14 x 1,5
24
6 – M 18 x 1,5
27
8 – M 20 x 1,5
30
10 – M 22 x 1,5
36
10 – M 24 x 1,5
Table 12. Torque instructions for burnished columns or lined with Dacromet
Wrench
Number of
(mm)
culumns
17
4 – M 12 x 1,5
19
5 – M 14 x 1,5
24
6 – M 18 x 1,5
27
8 – M 20 x 1,5
30
10 – M 22 x 1,5
36
10 – M 24 x 1,5
Table 13. Torque instructions for galvanised columns
USER MANUAL Tractor semitrailers PTL
7. ACTIONS DURING SERVICING
7.1.
7.1.1. Maintenance of wheels
Tightening torque
Tightening torque
(kgm)
9 min – 10 max
90 min – 100 max
13 min – 15 max
130 min – 150 max
27 min – 29 max
270 min – 290 max
35 min – 38 max
350 min – 380 max
45 min – 51 max
450 min – 510 max
55 min – 61 max
550 min – 610 max
Tightening torque
Tightening torque
(kgm)
9 min – 10 max
90 min – 100 max
15 min – 17 max
130 min – 150 max
30 min – 34 max
300 min – 340 max
40 min – 44 max
400 min – 440 max
50 min – 56 max
500 min – 560 max
60 min – 66 max
600 min – 660 max
Picture 8. Wheel tightening process
Chassis
Lever (mm)
(Nm)
450
450
450
600
800
920
Lever (mm)
(Nm)
450
450
500
700
900
1050
Applied force
(kg)
20
30
60
60
60
60
Applied force
(kg)
20
30
60
60
60
60
26
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