Portable Compressor 7/20
13---12
SEPTEMBER 2003
(5.) Air---bleed the injection pump.
NOTE
Entrance of dust and dirt can cause a mulfunction of the fuel
injection pump and the injection nozzle. Wash the fuel filter cup
periodically.
1.
Filter bowl
2.
Fuel filter cartridge
3.
Cover
4.
Air vent plug
5.
O ring
6.
Screw ring
7.
Pipe joint
8.
Spring
5
2
1
4
2
1
6
3
5
5
8
7
3
Figure 13---15.
FUEL FILTER
F.
Fuel Filter Cartridge Replacement
(1.) Replacement of the fuel filter cartridge with a new one every
400 operating hours.
(2.) Apply diesel fuel thinly over the gasket and tighten the
cartridge into position by hand---tightening only.
(3.) Finally, vent the air.
NOTE
Replacement of the fuel filter cartridge periodically to prevent
wear of the fuel injection pump plunger or the injection nozzle,
due to dirt in the fuel.
13.6.4.
Air Intake System
A. Air Cleaner
Engine performance and life vary with the air intake conditions.
A dirty air cleaner element reduces the amount of intake air,
causing reduced engine output and possible engine damage.
Also, a damaged element leads to abrasion of cylinders and
valves, resulting in increased oil consumption, reduced output
and shortened engine life.
The filter element should be changed at 500 hours or 6 months,
whichever comes first, or sooner if the restriction indicator shows
red. See
Figure 13---16
.
A
Normal
B
Clogged
1.
Indicator
2.
Window
3.
“RESET“ button
A
B
Red signal
1
2
3
Figure 13---16.
DUST INDICATOR
B. Air Cleaner With Dust Indicator
This indicator is attached to the air cleaner. When the air cleaner
element is clogged, air intake resistance becomes greater and
the dust indicator signal turns to red indicating the element needs
to be changed.
When the signal turns to red, replace the element. Then press the
dust indicator “RESET“ button
2
to reset the indication.
13.6.5.
Engine Electrical
The Kubota engines use a 12 V system and a negative grounding
for the electrical system.
Battery Servicing
A. Battery Terminal Connections
Check the battery cable connections for looseness or corrosion.
Poor cable connections will result in difficult engine starting or
insufficient battery charge.
The battery cables must be tightened securely.
Never reverse “+” and “---” terminals when reconnecting cables
after removal. Even a short period of reverse connection will
damage the electrical parts.
B. Cleaning Of Battery
When the battery terminals are fouled clean them with clean tepid
water and wipe with a dry cloth to remove the water. Apply a light
coat of vaseline or a grease.
C. Alternator Servicing
The polarity of the alternator is negative (---) grounding type.
Do not reverse the polarity connection, otherwise a short circuit
will occur resulting in alternator failure.
Do not put water directly on the alternator. Entry of water into the
alternator creates electrolytic corrosion causing failure.
When the battery is charged from an external source, be sure to
disconnect the battery cables.
D. Wiring Connections
Check all of the electric wiring connections for looseness and
damage on a regular basis.
13.6.6.
Service And Maintenance
Please refer to the engine maintenance schedule.
For continued trouble free engine operation throughout its life,
the service procedures marked with an asterisk (*) need to be
carried out by a skilled and trained technician.
