Screw Connections Inspection - PRONAR T679/4M User Manual

Technical inspection schedule
5.18

SCREW CONNECTIONS INSPECTION

TIGHTENING TORQUES FOR SCREW
During maintenance and repair work, apply
appropriate tightening torques to screw
connections, unless other tightening pa-
rameters are given. Recommended tight-
ening torques for the most commonly used
bolted connections are shown in the Table
5.6. The given values apply to non-lubri-
cated steel bolts.
The hydraulic hoses should be tightened
with a torque of 50 -70Nm.
The tightness should be checked using
a torque wrench in accordance with the
1
Figure 5.13 Metric thread screw
(1) strength class, (d) thread diameter
CONNECTIONS
d
589-I.10-1
Table 5.6. Tightening torque
Tightening torque
Metric
thread
5.8
(*)
M8 18
M10 37
M12 64
M14 100
M16 160
M20 300
M24 530
M27 820
M30 1,050
(*) - strength class according to DIN ISO 898
guidelines in the chapter Tightening the
road wheels and Table 5.9 Schedule
for checking
During daily inspection of the trailer pay
attention to loose connections and tighten
the connector if necessary
inspection of the trailer pay attention to
loose connections and tighten the con-
nector if necessary. Replace lost items
with new ones.
TIGHTENING ROAD WHEELS
The wheel nuts should be tightened grad-
ually diagonally (in several stages until the
required tightening torque is achieved),
using a torque wrench. The recom-
mended order of tightening the nuts and
PRONAR T679/4M
Chapter 5
8.8 10.9
(*)
25 36
49 72
85 125
135 200
210 310
425 610
730 1,050
1,150 1,650
1,450 2,100
bolted connections.
During daily
5.27
(*)