Komatsu D37EX-24 Operation & Maintenance Manual page 190

MACHINE OPERATIONS AND CONTROLS
6.
Open the bracket (3) backward.
It can be used as a place where the BIB container is put
on.
7.
Put the BIB container gently on it.
8.
Open the filler port (4) cap.
For the filler port cap opening and closing method, see
METHOD FOR OPENING AND CLOSING DEF TANK
FILLER PORT CAP (3-186).
9.
Insert the bellows hose of the BIB container into the filler
port (4).
If it is difficult to insert the bellows hose into the filler port
(4), make the mating point of the end of the BIB container
and the bracket (3) as a fulcrum, and lift up the other end
of BIB container to perform the work.
10. While watching the sight gauge (5), add DEF through the
filler port (4) until float (6) reaches the line F (7).
The line (8) in the sight gauge indicates approximately 5 ℓ
below the line F.
The line (9) is the adding line when DEF may freeze in
cold weather.
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OPERATION