EN – 8
Disassembling the pump
Disassembling
the fan coupling
(
see page N – 2
)
Replacing
the front seal
Disassembling
the gas ballast
except model pump C2
(
see page N – 2
)
Disassembling
the motor block
cover
Follow the chronological order of disassembling instructions.
See the drawings and their part lists in pages
N – 1
to
N – 23
.
Removing pump from
system
The following steps are necessary to protect the pump as far as possible from the
effects of corrosion:
• Flush pump with a neutral gas (dry nitrogen) during half an hour to prevent toxic or
corrosive gases accumulating in the pump.
• C2 Model: Disconnect the nitrogen lines to the pump.
• Disconnect the pump from the system and seal off the inlet and exhaust ports. Bring
the pump to the maintenance area immediately.
• Drain pump (
see Operating instructions
).
The first phase of disassembly is to disassemble the motor, the second is to disassemble
the pumping module.
Th fi t h
f di
bl i t di
bl th
t
th
d i t di
bl
Do not store a pump in this condition for any length of time: once the
neutral gas has dissipated, the inside of the oil case will be in contact with
the ambient air laden with water vapor; this may react with the pumped
gases to form acids that may corrode the pump even at room temperature.
Study the general precautions listed on Maintenance chapter page 3.
Remove the motor cover.
5
Remove the motor attachment screws
(
5
) (
see page N – 18
).
If the motor is damaged, replace it (
see
page N – 19
).
Remove the fan (
33
) fastening screw
(
28
) and the support washer (
26
).
Remove the key.
28
33
See
page 7
.
Remove the gas ballast cover (
58
)
(2 screws), the adjustment button (
55
),
the spring (
54
) and the sleeve (
53
).
Remove the tank feed-through (
49
)
(2 screws) and its seal (
48
).
55
58
54
49
48
53
5
1
3
6
