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Pump Rebuilding; Figure 5-2. Dual Stage Pump - Thermo Scientific 42iQ Instruction Manual

No-no2-nox analyzer

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Pump Rebuilding

Thermo Scientific
Use the following procedure to rebuild the pump.
Equipment required:
Pump rebuild kit (qty. 2)
Phillips drive, #1 or Torque drive, T10 (depending on pump version)
Pencil or marker
Figure 5–2. Dual Stage Pump
Note To avoid opening the pneumatic connection between the pump
heads, service the pump as described below with the following addition:
Make steps 1 to 3 and 11 for both pump heads together.
1. Turn instrument OFF, unplug the power cord, and remove the cover.
2. Mark the position of head parts relative to each other by drawing a line
with a pencil. This helps avoid incorrect assembly later.
3. Undo the four screws in the head.
4. Lift the head plate and the intermediate plate off the housing.
Maintenance
Pump Rebuilding
42iQ Instruction Manual
5-5

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