MAINTENANCE |
Replace brushes when they wear within 1/4”(3.5mm) of the pigtail. A complete set of replacement brushes should be kept on hand. Lincoln brushes have a curved face to fit the commutator. Have an experi- enced maintenance man seat these brushes by lightly stoning the commutator as the armature rotates at full speed until contact is made across the full face of the brushes. After stoning, blow out the dust with low pressure air.
To seat slip ring brushes, position the brushes in place. Then slide one end of a piece of fine sandpaper between slip rings and brushes with the coarse side against the brushes. With slight additional finger pres- sure on top of the brushes, pull the sandpaper around the circumference of the rings - in direction of rotation only - until brushes seat properly. In addition, stone slip ring with a fine stone. Brushes must be seated 100%.
Arcing or excessive exciter brush wear indicates a possible misaligned shaft. Have an authorized Field Service Shop check and realign the shaft.
CAUTION
IDLER MAINTENANCE
Before doing electrical work, disconnect the bat- tery.
When installing a new battery or using a jumper bat- tery to start the engine, be sure the battery polarity is connected properly. The correct polarity is negative ground. Damage to the engine alternator and the Engine Control Unit can result from incorrect connec- tion.
1.Proper operation of the idler requires good grounding of the Engine Control Unit, current sensing printed circuit board and battery.
2.If desired, the welder can be used without automat- ic idling by setting the “Idler” switch to the “High” position.
NAMEPLATES
Whenever routine maintenance is performed on this machine - or at least yearly - inspect all nameplates and labels for legibility. Replace those which are no longer clear. Refer to the parts list for the replace- ment item number.
PURGING AIR FROM FUEL SYSTEM (KUBOTA V2203M ENGINE)
WARNING
Keep fuel clear of open flames or arcs, allow engine to cool before working on the fuel system. Wipe up any spilled fuel and do not start engine until fumes clear.
If the engine is running rough and you suspect air has been trapped in the fuel system, (e.g. the engine was allowed to run out of fuel) perform the following steps using qualified personnel:
1.Fully open the air bleeding valve by turning it counter clockwise, it is located on top of the fuel injection pump next to the oil filler. (see figure D.1)
Air Bleeding
Valve
FIGURE D.1
2.Turn the engine by pressing the start button until the engine runs smoothly (this should take approxi- mately 10 seconds).
3.Fully close the air bleeding valve by turning it clockwise.
Contact your Kubota Engine repair facility if problems persist.