John Deere ET-3402-J - Manual (Page 17)

7 1/4 Inch Circular Saw Operator's Manual 17
Maintenance and Inspection
MAINTENANCE AND INSPECTION:
CAUTION: BE SURE TO SWITCH POWER OFF AND DISCONNECT THE
PLUG DURING MAINTENANCE AND INSPECTION.
1. Inspecting the saw blade: Since use of a dull saw blade will degrade efficiency and
cause possible motor malfunction, sharpen or replace the saw blade as soon as
abrasion is noted.
2. Inspecting the mounting screws: Regularly inspect all mounting screws and ensure
that they are properly tightened. Should any of the screws be loose, retighten them
immediately. Failure to do so could result in serious hazard.
3. Inspecting the carbon brushes: The motor employs carbon brushes which are
consumable parts. Since an excessively worn carbon brush could result in motor
trouble, replace the carbon brush with a new one which has the same carbon brush
No. shown in figure when it becomes worn to or near the "wear limit". In addition,
always keep carbon brushes clean and ensure that they slide freely within the
brush holders.
4. Replacing a carbon brush: Disassemble the brush cap with a minus head
screwdriver. The carbon brush can then be easily removed.
5. Adjusting the base and saw blade to maintain perpendicularity: The angle between
the base and the saw blade has been adjusted to 90, however should this
perpendicularity be lost for some reason, adjust in the following manner.
a.
Turn the base face up (Fig. 13) and loosen the wing bolt (A) (Fig. 7).
b. Apply a square to the base and the saw blade and, turning the slotted set
screw with a minus screwdriver, shift the position of the base to produce the
desired right angle.
(Fig. 12)
(Fig. 13)