Komatsu PC138US-11 Operation & Maintenance Manual page 208

MACHINE OPERATIONS AND CONTROLS
Refuelling can be stopped at any time by turning off the
master switch (5).
**NO SIGNAL**
If more fuel is needed in the fuel tank after the float switch
has stopped the pump, press and hold switch (6).
When switch (6) is pressed and held, the refuel pump will
fill the tank. Releasing switch (6) will stop the refuel pump
in this override condition.
When using this override, the level of the tank must be
monitored to prevent overfilling and fuel spillage. If fuel is
allowed to overflow stop refuelling immediately by turning
off the master switch.
After finishing refuelling make sure the master switch (5) is
returned to the OFF position.
4.
Push float gauge (8) straight down with fuel filler cap (9),
be careful not to get the float gauge (8) caught in the tab of
the fuel filler cap (9) and tighten fuel filler cap (9) securely.
5.
Tighten strainer valve cap (H) to the closed position to prevent leakage of fuel left in the hose.
(O): Open position
(C): Closed position
6.
Replace the fuel hose into storage tray.
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RKA55320
RKA55350
RKA55360
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RKA55370