Guide Bars
7
5.1
Tools, Servicing Aids
–
Guide bar dresser – 5605 773 4400
–
Filing gauge 1/4" P – 0000 893 4005
–
Filing gauge 1/4", 3/8" P, .325", 3/8" – 1100 893 4000
–
Filing gauge .404", 1/2" – 1106 893 4000
–
Groove drift 1.3 mm – 1110 893 9200
–
Groove drift 1.6 mm – 1106 893 9200
–
Flat file
–
Hammer
–
Leveling plate
–
Spacer that matches groove width
5.2
Removing Burrs
A burr can build up on the outer edge of the guide bar.
N
Inspect bar body for cracks and damage.
N
Remove burr with a belt grinder and/or grinding
wheel.
The burr can also be removed with a flat file or the STIHL
guide bar dresser.
N
Check groove depth with a filing gauge of the right
pitch.
Depending on the pitch, the following minimum groove
depths must be maintained:
N
If the measured groove depth is less than specified:
Replace the guide bar.
5.3
Straightening the Guide Bar
N
Inspect bar body for cracks and damage.
N
Support the bar in a press or vise at two points
equidistant from the center of the bend (1).
N
Apply pressure to the apex of the bend (1) until the
bar is straight.
N
Release pressure and check that the bar is still
straight. If the bar is not straight: Repeat the above
procedure.
N
Use a hammer to finish straightening on a leveling
plate until it is flat in the rail area.
N
Inspect bar body for cracks and damage.
5.4
Opening and Closing the Bar Groove
Opening the Groove
N
Inspect bar body for cracks and damage.
N
Clamp the center of the guide bar in a vise.
N
Insert a groove drift which matches the specified
groove width in the groove at an angle of about 45°.
N
Use a hammer to knock the groove drift through the
pinched portion of the groove.
N
Inspect bar body for cracks and damage.
Closing the Groove
N
Inspect bar body for cracks and damage.
5
Guide Bar Body
– 1/4" P: 4 mm
– 1/4":
4 mm
– .325": 6 mm
– 3/8" P: 5 mm
– 3/8":
6 mm
– .404": 7 mm
0000-GXX-2226-A0
1
0000-GXX-2374-A0
0000-GXX-2375-A0
