Servicing Jet Scavenger Pump - Piper Cheyenne IIIA Airplane Maintenance Manual

PIPER AIRCRAFT
PA-42-720 (Advanced Trainer)
MAINTENANCE MANUAL
A. Distribution (continued)
4. Servicing Jet Scavenger Pump (refer to 28-20-00 Figure 302)
This jet pump canister is basically a replaceable, not a repairable item. However, if the jet, elbow,
or check valve become clogged or fouled, remove and replace as follows:
(a) Disconnect inlet line from elbow.
(b) Release locknut securing elbow in position.
(c) Carefully remove elbow, check valve, and replace O-ring if necessary.
(d) Slide a piece of 0.02 inch safety wire through elbow end of canister to other side and put a
1/16 inch or less bend at end of wire.
(e) Carefully slide wire back through and pull out jet and spring washer. Replace washer, if
necessary.
(f) Replace parts in reverse order.
Line Connector to Solenoid Valve
Hose to Fuel Divider
Spring Clamp
Spring Clamp 7 Modified
Elbow
Overflow Drain Line
Nozzle
Scavenage Can
O-Ring Seal
Drain Check Valve
Jet Scavenger Pump
Figure 302
EFFECTIVITY:
040-999
28-20-00
Jan 10/90