Operation; Maintenance - Makita JS3201 Instruction Manual

Rotating or replacing blades
Both the upper and lower blades have four cutting
edges on each side (the front and back). When the
cutting edge becomes dull, rotate both the upper and
the lower blades 90° to expose new cutting edges.
When all eight edges are dull on both the upper and
lower blades, replace both blades with new ones. Each
time blades are rotated or replaced, proceed as follows.
► Fig.3: 1. Hex wrench 2. Lower blade 3. Upper blade
securing bolt 4. Upper blade
Remove the blade securing bolts with the hex wrench
provided and then rotate or replace the blades.
► Fig.4: 1. Tighten 2. Upper blade securing bolt
3. Upper blade
Install the upper blade and tighten the upper blade
securing bolt with the hex wrench. Press up on the
upper blade while tightening it.
► Fig.5: 1. Blade holder 2. Upper blade securing bolt
3. Upper blade 4. No gap allowed
After securing the upper blade, be sure that there is no
gap left between the upper blade and the beveled sur-
face of the blade holder.
► Fig.6: 1. Lower blade positioning bolt 2. Lower
blade 3. Upper blade
Then install the lower blade like the upper blade while
adjusting the clearance between the upper blade and
lower blades. When performing this adjustment, the
upper blade should be in the lowered position.
► Fig.7: 1. Lower blade positioning bolt 2. Hex nut
3. Thickness gauge
First, semi- tighten the lower blade securing bolt, then
insert the thickness gauge for the desired clearance.
The cutting thickness is indicated on the thickness
gauge so the combinations shown in the table below
should be used. Work the lower blade positioning bolt
on the yoke until the clearance is such that the thick-
ness gauge moves only with some difficulty. Then firmly
tighten the lower blade securing bolt. Finally, tighten the
hex nut to secure the lower blade positioning bolt.
Thickness gauge combinations
Material thickness 2.3 mm (14 ga.) 2.5 mm (13 ga.) 3.2 mm (10 ga.)
Thickness gauge
1.0 +1.5
combinations

OPERATION

CAUTION:
• When cutting, always place the shear on the
workpiece so that the material cut away is posi-
tioned on the right side to the operator.
• Hold the tool firmly with one hand on the main
handle when performing the tool.
1.0 +1.5 1.5 + 2.0
Holding material
► Fig.8: 1. Workholder
The materials for cutting should be fastened to the
workbench by means of workholders.
Shearing method
► Fig.9
For smooth cuts, tip the tool slightly backward while
advancing it.
Maximum cutting width
► Fig.10: 1. Cutting line
Stay within the specified maximum cutting width (A):
Case of length 1,800 mm.
Mild steel (thickness)
Max. cutting width (A)
Stainless (thickness)
Max. cutting width (A)
Minimum cutting radius
Minimum cutting radius is 50 mm when cutting 2.3 mm
mild steel.

MAINTENANCE

CAUTION:
• Always be sure that the tool is switched off and
unplugged before attempting to perform inspec-
tion or maintenance.
• Never use gasoline, benzine, thinner, alcohol
or the like. Discoloration, deformation or cracks
may result.
The tool and its air vents have to be kept clean.
Regularly clean the tool's air vents or whenever the
vents start to become obstructed.
Replacing carbon brushes
► Fig.11: 1. Limit mark
Remove and check the carbon brushes regularly.
Replace when they wear down to the limit mark. Keep
the carbon brushes clean and free to slip in the holders.
Both carbon brushes should be replaced at the same
time. Use only identical carbon brushes.
► Fig.12: 1. Screwdriver 2. Brush holder cap
Use a screwdriver to remove the brush holder caps.
Take out the worn carbon brushes, insert the new ones
and secure the brush holder caps.
To maintain product SAFETY and RELIABILITY, repairs,
any other maintenance or adjustment should be per-
formed by Makita Authorized Service Centers, always
using Makita replacement parts.
6 ENGLISH
3.2 mm Under 2.3 mm
90 mm No limit
2.5 mm Under 2.0 mm
70 mm No limit