7 Maintenance
K-375 / K-376 / K-377
Operation Manual, Version E
138
1
1
∙ Remove the two screws a on the rear
side of the instrument. The posi-
tion of the sodium hydroxide pump
is marked on the housing with the
imprinting “NaOH”.
3
3
2
1
∙ Open the service door.
∙ The sodium hydroxide pump is the
lowermost of the three pumps situ-
ated on the left side.
∙ Disconnect the two plug connectors
1
. (Note for reassembly: The upper
one connects the green cable, the
lower one the brown cable!)
∙ Disconnect the tube on the front side
2
.
∙ Unscrew the two screws
3
from the
front panel and take the front panel
away. The pump becomes loose now
and can be replaced.
∙ Reassemble in reversed order.
7 5 3
Replacement of the wave spring
∙ Remove the rack and move the sampler arm to the service position.
∙ Remove the dip tube.
∙ Pull the wave spring together with the wave spring holder out of the sampler arm from below:
• Plug a new wave spring with a new holder from below into the sampler arm:
