Replace Def Supply Module Main Filter - Hitachi ZW 550-6 Operator's Manual

Replace DEF Supply Module Main Filter

--- every 4500 hours
A filter (4) is mounted in the DEF pump. Periodically replace
filter (4).
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.
IMPORTANT:
 Take care not to allow dirt and/or water to enter
the DEF tank while replacing filter (4).
 Check for leaks around the mounting position
after replacement.
 White deposition may be observed when DEF
is dried naturally; it is normal. Wash out DEF
deposition with clean water. Never use a high
pressure washer.
 After stopping the engine, the DEF pump keeps
operating.Wait for 3 minutes or more after
turning OFF the key switch until the pump stops
running.
1. Park the machine following the same procedures as
described on page 7-6 for preparation of inspection/
maintenance work.
f
NOTE: The DEF supply module (DEF pump) is located on
the frame left rear of the machine.
2. Remove bolts (1), nuts (5, 6) with washers, and covers
(7, 8, 9).
3. Remove cap (3) from the DEF pump.
4. Pull out filter (4) inside the supply module. As it is
tightly mounted, it can not be pulled by hands. Use
tools such as pliers. Replace filter (4) assembly when
replacing filter (4) of DEF supply module.
5. Install new filter (4), and tighten cap (3).
m : Cap (3): 20±5 N·m (14.75±3.7 lbf·ft)
6. Fix covers (7, 8, 9) with bolts (1) and nuts (5, 6) with
washers.
MAINTENANCE
5,6
7-109
1
7
9
1
8
3
4
3
2
115Z7B-7-109-1
115Z7B-7-109-2
MDC1-07-044