Inspect The Fuel And Hydraulic Tank Cap Venting Systems - Genie GS-3390 Service Manual

July 2007
REV G
B-18
Inspect the Fuel and Hydraulic
Tank Cap Venting Systems
Genie requires that this procedure be performed
every 250 hours or quarterly, whichever comes
first. Perform this procedure more often if dusty
conditions exist.
Free-breathing fuel and hydraulic tank caps are
essential for good machine performance and
service life. A dirty or clogged tank cap may cause
the machine to perform poorly and continued use
may cause component damage. Extremely dirty
conditions may require that the caps be inspected
more often.
Explosion and fire hazard. Engine
fuels are combustible. Perform this
procedure in an open, well-
ventilated area away from heaters,
sparks, flames and lighted
tobacco. Always have an
approved fire extinguisher within
easy reach.
Note: Perform this procedure with the engine off.
1 Remove the cap from the fuel tank.
2 Check for proper venting.
Result: Air passes through the fuel tank cap.
Proceed to step 4.
Result: If air does not pass through the cap,
clean or replace the cap. Proceed to step 3.
Note: When checking for positive tank cap venting,
air should pass freely through the cap.
Part No. 72863
Section 3 • Scheduled Maintenance Procedures
3 Using a mild solvent, carefully wash the cap
venting system. Dry using low pressure
compressed air. Repeat this procedure
beginning with step 2.
4 Install the fuel tank cap onto the fuel tank.
5 Remove the breather cap from the hydraulic
tank.
6 Check for proper venting.
Result: Air passes through the fuel tank cap.
Proceed to step 8.
Result: If air does not pass through the cap,
clean or replace the cap. Proceed to step 7.
Note: When checking for positive tank cap venting,
air should pass freely through the cap.
7 Using a mild solvent, carefully wash the cap
venting system. Dry using low pressure
compressed air. Repeat this procedure
beginning with step 6.
8 Install the breather cap onto the hydraulic tank.
GS-3390 • GS-4390 • GS-5390
CHECKLIST B PROCEDURES
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