HAWE Hydraulik HLU LE-X, Руководство по сборке

Страница: 53 / 63

1. Always check only one locking unit at a time (alternating checks).
a) Shut off all other locking units and any mechanical back-up systems and secure them all against
inadvertent restarting.
b) Make sure that no external force is acting on the locking unit, so that the check valve can open
under load.
c) Close the restraint system as per the switching logic (page 18 ).
2. Load the locking unit with 10 to 20% of the permissible
dynamic locking force
according to the
technical data sheet for 3 to 5 seconds in the opening direction.
3. Pay attention to the position of the piston rod before and after applying the load.
✓
Component coverings that obstruct checking have been removed.
If component coverings cannot be removed, determine the transmission ratio of the piston rod
movement as a check indicator. To do this, calculate by how many millimeters the restraint system
can be adjusted with 1 mm extension/retraction of the piston rod, Take into account the seat
kinematics and bar ratio.
Take into account any permissible play in the restraint system mechanism.
If during the check the lock position on the cylinder changes by more than 1 mm in the locking
direction, or if oil leaks out, the locking unit is faulty.
Replace the locking unit if it is faulty.
8.6.2 Opening function
DANGER
Danger to life due to damage to the pressure vessel
Damaged pressure vessels can cause hydraulic uid or gas to escape at high pressure and penetrate deep
into the body via the skin and eyes. This can lead to severe and irreparable injury, or even death.
►
Assembly only by trained specialist personnel.
►
Never weld, solder or drill pressure accumulators.
►
Do not disconnect the pressure accumulator from the hydraulic locking unit.
►
Never modify the hydraulic locking unit with pressure accumulator.
►
Never perform any maintenance on the hydraulic accumulator yourself.
Interval
Daily
Aids, tools, materials
■
None
Do not carry out checks in an extreme temperature range (see technical data sheet).
1. Close the restraint system as per the switching logic (page 18 ).
2. Open the restraint system as per the switching logic (page 18 )
3. In the event of the following issues, stop using the system and observe the notes on troubleshooting
(page 58 ):
HAWE Hydraulik SE B 6052-21 -
11
-2021 - 1.7 53/63