OmarLift C40, Operating Instructions Manual

Page: 24 / 64

7
Maintenance, inspection, repair and safety
emergency
7.1. General points
The hydraulic components are not subject to heavy
wear, are safe and require little maintenance. In
order to obtain these results, the components must
be chosen carefully and be of the correct dimensions
and the oil must be appropriate to the system
features.
7.2. EM manual emergency valve
Also the seal of the hand push button is provided by
a sphere and can be compromised by dirt entering
between the seat and sphere. When the emergency
switch is actuated a jet of oil is noted that should
cease completely when the switch is released. If
this does not occur, there may be leaks from the
emergency valve but also leaks from the solenoid
valve EVD HDU, ( if installed ) which discharges from
the same point.
The following checks, including those of
point c) must be performed with pressure
inside the valve. Extreme caution must therefore be
exercised.
In order to check the seal of the emergency valve,
use the emergency valve’s hexagon to unscrew the
emergency unit completely, dry off the oil remaining
in the hole and check that no other oil escapes from
the sphere (see 15).
The manufacturer reserves the right to make changes without prior notice!
GB
Operating instructions for
MINILIFT PUMP UNIT C40 - C50
Page: D846M5L.012
Date of Issue: 14/03/2012
Version: Rev.
02
Approved: UT
This table describes the function of each element.
TABLE OF VALVE SETTINGS FOR 1 and 2-speed
MINILIFT valve
SCREW DESCRIPTION SETTINGS
N.1
Maximum valve
pressure calibration
Tighten to increase maximum
calibration pressure.
Loosen to decrease maximum
calibration pressure.
N.2 Low speed setting
Tighten to increase low speed
Loosen to decrease low speed
N.3
Calibration of rod
counterpressure
and rope anti-fl eeting
Tighten to prevent the rod
descending alone
in an emergency
Loosen to enable rod to
descend alone in an emergency
N.4 Stop valve test
If screw is tightened
completely the cabin speed
tends to exceed nominal
speed and triggers the
parachute valve
N.5
Choke device for
deceleration from high
to low speed (ascent
and descent)
Tighten to brake more
slowly.
Loosen to brake faster
N.6 Ascent speed limiter
Tighten to reduce ascent
speed
Loosen to increase ascent
speed to maximum
pump capacity
N.7
Choke device for
pressurising and
ascent start
Tighten to delay
pressurisation with
consequent gentle start-up
Loosen to obtain immediate
pressurisation with rapid
start-up
N.8
Descent speed
adjuster
1 speed
(2 SPEED)
1 vel – Unscrew to increase
the downward speed
2 VEL – SCREW TO
INCREASE THE DOWNWARD
SPEED
N.9
Calibration of hand
pump pressure
Tighten to increase hand
pump calibration pressure
Loosen to decrease hand
pump calibration pressure
Table 4
Figure 15
Screw 3