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Operating Instructions Elevator Buffers LP Page 8 Edition 3.3.1 EN of 03.04.2017
9 Measures during operation
9.1 What is to be done after a buffer stroke?
During normal elevator operation the buffers do
not come into operation. Therefore, a buffer
stroke is regularly the result of an operation fail-
ure.
After release of the buffer and the signalling of
the piston rod reset (limit switch 13), as a rule,
the elevator is again ready for operation.
Nevertheless, we recommend a full visual in-
spection of the buffer and the elevator.
9.2 What is to be done if oil leakage is detected?
Search for the location of oil leak. If leaking oil is
visible and the leak cannot be stopped, the buff-
er should be changed immediately.
In the case of small leaks the buffer may remain
in use. At first check the oil level of the buffer. If
the oil level is below the minimum (Fig. 2a/2b),
refill oil (see chapter 8). Subsequently, the buffer
should be checked at shorter intervals.
In the case of any doubt regarding the state of
the buffer, it should be changed. For this pur-
pose Henning offers a repair/exchange service
for buffers.
Leaked oil should be absorbed using oil binder
or cleaning rags.
9.3 What is to be done in the case of too low an oil level?
Check the buffer for leakages. If no leaks are
found, oil should be refilled (see chapter 8).
If oil is leaking, proceed as described in chapter
9.2.
9.4 What is to be done in the case of too high an oil level?
Too high an oil level can only occur if too large a
quantity of oil has been refilled. Follow the in-
structions under point 7.2 "Oil level check".
Make sure that the piston rod is entirely extend-
ed. If oil must be removed, follow chapter 8.
9.5 What to do if the piston rod will no longer fully extend?
Refill nitrogen as described under point 8.4.
Check the entire buffer with leak detecting spray
or soap water for possible gas leakage. If the
problem still exists, the buffer should be ex-
changed or repaired by skilled personnel.
9.6 What is to be done if the piston rod is damaged?
Damaged or bent piston rods impair the func-
tional safety of the buffer. Such buffers should
be exchanged or repaired by skilled personnel.
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