Drain Water And Sediment From Fuel Tank; Check And Drain Water Separator - Hitachi ZW180 Operator's Manual

Drain water and sediment from fuel tank

2
--- every 1000 hours
Before starting to operate the machine, remove plug (2)
from the tip of drain valve (1) on the fuel tank bottom and
open drain valve (1) to drain water and/or sediment from
the fuel tank. Plug (2) is installed to protect drain valve (1)
from vandalism.
3
Check and drain water separator --- every 10 hours
ZW180
Water separator (1) is a device to separate water mixed in
fuel. The water separator and the fuel pre-filter are com-
prised of one unit. When water accumulates, the engine
warning indicator (5) and the service indicator (6) will flash.
Be sure to drain water.
Drain procedures
1. Connect a transparent drain hose provided in the toolbox
to drain plug (3).
2. Loosen air bleed plug (4) on the top of water separator (1).
Loosen drain plug (3) on the bottom of the water separa-
tor case to drain water accumulated in the case.
3. After draining, be sure to tighten plugs (3and 4). Store
the used hose in the toolbox.
Bleed air from the fuel system
NOTE: If air is mixed in the fuel system, the engine may be-
come difficult to start or engine trouble may occur.
After allowing the fuel tank to empty, draining the wa-
ter separator, or replacing the fuel pre-filter element,
be sure to bleed air from the fuel system. In case water
content in the fuel is high, shorten the check and drain
intervals.
1. Turn the key switch ON. The electric fuel pump is driven,
starting to bleed air.
2. Turn to the left to loosen the top (disk plate) of feed
pump (2). The inner spring force raises the disk plate.
MAINTENANCE
7-54
1
4
2
3
5
2
M4GB-07-063
M4GF-07-011
1
6
M4GF-01-001