LAUMETRIS PTL Series, User Manual

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USER MANUAL Tractor semitrailers PTL 26

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.
7. ACTIONS DURING SERVICING
7.1. Chassis
7.1.1. Maintenance of 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
(mm)
Number of
culumns
Tightening torque
(kgm)
Tightening torque
(Nm)
Lever (mm) Applied force
(kg)
17 4 – M 12 x 1,5 9 min – 10 max 90 min – 100 max 450 20
19 5 – M 14 x 1,5 13 min – 15 max 130 min – 150 max 450 30
24 6 – M 18 x 1,5 27 min – 29 max 270 min – 290 max 450 60
27 8 – M 20 x 1,5 35 min – 38 max 350 min – 380 max 600 60
30 10 – M 22 x 1,5 45 min – 51 max 450 min – 510 max 800 60
36 10 – M 24 x 1,5 55 min – 61 max 550 min – 610 max 920 60
Table 12. Torque instructions for burnished columns or lined with Dacromet
Wrench
(mm)
Number of
culumns
Tightening torque
(kgm)
Tightening torque
(Nm)
Lever (mm) Applied force
(kg)
17 4 – M 12 x 1,5 9 min – 10 max 90 min – 100 max 450 20
19 5 – M 14 x 1,5 15 min – 17 max 130 min – 150 max 450 30
24 6 – M 18 x 1,5 30 min – 34 max 300 min – 340 max 500 60
27 8 – M 20 x 1,5 40 min – 44 max 400 min – 440 max 700 60
30 10 – M 22 x 1,5 50 min – 56 max 500 min – 560 max 900 60
36 10 – M 24 x 1,5 60 min – 66 max 600 min – 660 max 1050 60
Table 13. Torque instructions for galvanised columns
Picture 8. Wheel tightening process