HLDA
– Double acting - Doubled thrust hydraulic linear actuator
Use and maintenance manual
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Pag. 14
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7) -Screw the stud bolts (item 1) into the actuator pedestal flange, and
screw the nuts on the stud bolts.
8) -Tighten according to the nut (item 2) size torque requirements.
To operate refer to following table:
Table 1:
nuts tightening torque
Threading
Tightening
torque (Nm)
M8
20
M10
40
M12
70
M14
110
M16
160
M20
320
M22
420
M24
550
M27
800
M30
1100
M33
1400
M36
1700
The screwing values in Table 1 were calculated considering the
materials ASTM A320 L7 for screws or tie rods and ASTM A194
gr.2H for the nuts.
2.5 HYDRAULIC CONNECTIONS
Check that the values of hydraulic supply available are
compatible with those reported on the identification
plate of the actuator.
The connections should be made by qualified staff.
Use pipes and connections appropriate as for type,
material and dimensions.
Use motor fluid with purity degree ISO 4406 17/14 or
NAS 1638 Class 8 (AS4059 Class 4B-F).
