Inspection and Maintenance
8-24
750-91 (revised 2009)
Model CB-LE Packaged Boiler Manual
8.19.8 — Air Compressor Replacement
Use the following procedures when replacing the pump. Be sure to tag the motor leads if disconnected to simplify
reconnection.
FIGURE 8-10. Air Compressor
8.19.8.1 — Dismantling
1. Lift out the two front cylinder pins that hold the screen and remove the screen.
2. Disconnect the flared nut on tubing (behind screen) and lift tubing high enough to prevent drainage of lubricat-
ing oil from the tank.
3. Disconnect the flared nut at the orifice fitting.
4. Remove the two sheet metal screws that hold the cylinder in place. One screw is located at the top rear of the
cylinder, the other is at the bottom front.
5. Remove the entire heat exchange assembly, consisting of the cylinder, the finned tubing, and the oil line.
6. Remove the fan from the air pump.
7. Disconnect the flexible air line from the lube tank.
8. Remove the coupling guard by pushing in on both sides until it clears the clamp.
9. Loosen the clamp at the rear of the tank and remove the tank with copper tubing attached.
10. Leave the rear pump bracket (coupling end) in place to aid in realignment of the replacement pump. Do this by
removing the two capscrews that extend through the bracket into the pump housing. Temporarily leave the
front bracket attached to the pump.
11. Remove the screws holding the front bracket to the base and lift off the pump with its attachments. Note the
location of the pipe fittings and brackets prior to removing for installation on the replacement pump. If piping
is dismantled, be sure that the check valve is reinstalled so the gate swings towards the pump.
8.19.8.2 — Reassembly
Reassemble in reverse order of disassembly. With the rear pump bracket left in place, realignment and spacing
between the pump shaft and the motor shaft is greatly simplified.
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