Dynojet Compressed Air Air/Fuel Ratio Module - Manual (Page 24)

Compressed Air Air Fuel Ratio Module Installation and User Guide
C H A P T E R 2
Air Pump Maintenance and Troubleshooting
2-8
P UMP M AINTENANCE —S TAND A LONE
To ensure accurate readings, pump maintenance should be performed every six
months, or sooner, depending on usage. Periodically check the air flow and adjust as
necessary to maintain 35 L/min for each sample tube. If you are unable to adjust the
air flow to 35 L/min, clean the pump. Use a solvent to clean all pump pieces very
carefully.
1
Remove the ball valve or solenoid (for pumps using the control pod).
2 Loosen the lock nut.
3 Remove the vacuum generator exhaust port.
4 Remove the venturi body.
5 Remove the sensor(s) from the sensor block.
6 Remove the two screws securing the sensor block to the toggle clamp.
7 Use a solvent to carefully clean the vacuum generator exhaust port, venturi body,
and sensor block.
Note: Be careful not to damage the internal structure of the venturi body.
8 Install the sensor block using the two screws removed earlier.
9 Install the venturi body, vacuum generator exhaust port, and ball valve or
solenoid.
10 Install the sensor(s).
11 Replace the silicon and copper tubing if necessary.
12 Re-calibrate the pump using the flow meter. Refer to page 1-12 for more
information.
Figure 2-6: Pump Maintenance—Stand Alone Pump
lock nut
vacuum generator
exhaust port
solenoid
venturi body sensor block
toggle clamp
silicon tube
copper sample
tube
sensor