Function Test After Repair Work - WAGNER Cobra 40-10 Translation Of The Original Operating Manual

Operating manual High-pressure double diaphragm pumps Cobra 40-10; Cobra 40-25
11 Function Test after Repair Work
11 FUNCTION TEST AFTER REPAIR WORK
After all repairs, the device must be checked for safe condition before recommissioning. The
necessary scope of inspection and testing depends on the repair carried out and must be
documented by the repair personnel.
Activity
1. Piston travel
4 It must be possible to move the piston rod on both sides up to stop with a
pre-assembled pressure stage. Balancing bore must be completely open in
the respective end position (visual inspection).
2. Oil filling
4 Mount pressure and fluid section on frame. Push piston into air motor-side
end position. Fill pre-assembled pump with oil via filling port until oil is
visible in the oil tank. Push piston into the opposite end position. Fill pump
further with oil until just below end of oil tank inspection window (see
Chapter Filling Hydraulic Stage with Oil [8 52]).
3. EX-relevant tests
1. Check the ground connection between the corresponding ground
connection of the pump and the frame/mobile base, and between the
individual parts of the frame/mobile base:
<100 kΩ
2. Check conductivity between the piston and the grounding connection:
<100 kΩ
These tests are -relevant!
4. Leaktightness check
1. Connect the air motor to the air supply (6 bar).
2. To perform a tightness check on the device, the product pressure with the
flushing agent is slowly increased in increments until the maximum
pressure indicated on the type plate is reached.
3. Close pump outlet.
4. In each position (with upstroke and downstroke), let sit for 0.5-1 minute(s)
and listen for audible blowing off.
5. When the air supply is turned off, a drop in pressure must be watched for.
6. Check leak tightness of the following components:
– flange seal
– ball valve (in all positions)
– pressure stage
– fluid section
5. General checks
1. Check tightening torque of various screws. Tighten hexagon screws
M12x65 (40-10) or M16x80 (40-25) and input valve housing with the
prescribed torque (see Chapter Spare Parts [8 65]).
2. Check all fittings.
3. Empty device in a controlled manner (Chapter Emptying Pump [8 44]) and
depressurize (Chapter Pressure Relief / Work Interruption [8 38]).
4. Check the functionality of the frame or transport mobile base. Check
whether the pump is mounted horizontally on the frame.
58
Aid tools
Manual inspection
Oil filling unit
Ohmmeter
(Measurement voltage
500...1000 VDC)
Air motor:
Test medium: Com-
pressed air
Leak spray
Fluid section:
Test medium: Suitable
flushing agent
Torque wrench
Visual check
Order number 2340851 | Edition 05/2022