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ZW220, ZW250
Water separator (1) is a device to separate water mixed in
fuel. The water separator and the main fuel filter are com-
prised of one unit. There is a float inside the case. When wa-
ter accumulates, the float buoys up. Before the float buoys
up to the top of the element, 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. Af-
ter allowing the fuel tank to empty, draining the water
separator, or replacing the fuel pre-filter (5) 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.
3. Loosen air bleed plug (4). Continue to press feed pump
(2) until fuel including no air bubbles flows out through
around the air bleed plug.
4. After air is bled, tighten air bleed plug (4). Press the feed
pump until it becomes hard to move.
5. Install the disk plate of feed pump (2) to the original posi-
tion.
6. Start the engine. Check the fuel system for fuel leaks.
MAINTENANCE
7-56
2
3
5
4
1
M4GB-07-064
M4GB-07-067
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