Clean Def Strainer - Hitachi ZW 550-6 Operator's Manual

5 . Install cap (5) after refilling DEF. Close the tank cover
(3).
IMPORTANT:
 Do not get on top of DEF tank (2) or sensors and
piping on the tank. Failure to do so may damage
the machine.
 White deposition may be observed when DEF
is dried naturally; it is normal. Wash out DEF
deposition with soft water. Never use a high
pressure washer.
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NOTE:
 Wipe spilled DEF and wash spilled area with plenty of
water.
 Flow sound may be heard from the tank after the
engine stops. It is the sound of returning DEF from
piping to the tank, not the malfunction.
 DEF will freeze under low temperature, deteriorate
(ammonification) under high temperature. Store the
DEF in -10 to 30°C (14 to 86°F) environment.
 Use dedicated container (purchased container) to store
or carry DEF. Or use polyethylene resin tank or stainless
tank.

Clean DEF Strainer

Check strainer (6) installed at the inlet of DEF tank, and
clean it as needed.
d
CAUTION: Use rubber gloves and goggles or
safety glasses for protection during operation.
Wash DEF with clean water when it contacts on the
skin. If splashed in eyes, flush with water for 10 to
15 minutes. Get medical attention immediately.
IMPORTANT: Take care not to allow dirt and/or water
to enter the DEF tank while checking or cleaning
strainer (6).
1. Take out strainer (6) from the DEF inlet port.
IMPORTANT:
 Use compressed air at the lower pressure than 0.2
MPa (30 PSI).
 Completely dry strainer before reinstalling to
avoid water from entering.
2. Clean strainer (6) by applying compressed air or
flushing with tap water.
3. Install strainer (6) at the DEF inlet port.
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NOTE: Consult your nearest authorized dealer if DEF
spills out while filling even after cleaning strainer (6).
MAINTENANCE
7-107
4
5
2
6
3
115Z7B-7-106-2
95Z7B-7-126-3