Heath Consultants Hi Flow Sampler - Manual (Page 49)

Hi Flow

Sampler Maintenance
Instruction 0055-9017 49
4.6 Pump Replacement
The pump located in either the leak-gas or background-gas sensor assembly (see
Figure 4-5) may become inoperative due to water or solid particles getting into the
valves. This will require replacement of the pump to correct.
Equipment Required:
•
5 /
64
" Allen Wrench
• Replacement Pump Assembly (P/N 0055-0061)
Procedure:
1. Remove cover per Section 4.3.
2. Back off the pump-bracket screw using a 5 /
64
" Allen wrench; then rotate bracket
arm to free pump. See Figure 4-6.
3. Unplug pump connector from printed circuit board and lift pump straight up.
4. Install the new pump by lining up the pump’s inlet and outlet tubes with the two
flow block holes and pushing into place. Swing bracket arm over pump and
tighten—realigning pump as necessary to make a proper fit.
5. Replace cover that was removed in Step 1.
Figure 4-6. Sensor or Pump Replacement