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ASK FOR AND INSIST ON GENUINE PIONEER PARTS
DEPTH GAUGE,
Do not increase the
clearance beyond the recommended
set-
ti ng.
Keep
all
depth
gauges
uniform
in height. A dept
h
(join-
t ing) gauge
must be used. Maintain
the round corner.
Do
not
attempt to correct
a
poor
cutting chain by INCREAS ING
the
depth clearance.
Always check cutter sharpness first.
See
Fig. No.
15.
r - - - - - - - - - ,
FIG. 15
.025
:o:::lu
E51JJ{~
~
JOINT CLEARANCE
EXCESS
IVE
DEPTH
GAUGE,
Lack
of care
in
setting the dept
h
gauge
may result in exces-
sive o
r
uneven
clearance.
This will cause the
cutters to
bite
in. chain
will
grab,
resulting
in overloading of attachments,
poor
perfor
man
ce and damage to
both
chain and bar. Fig.
16.
INSUFFICIENT DEPTH
GAUGE,
Cutters cann
ot
bite
in
to the
wood,
chain wi
ll
nOt
cut effic-
iently or
to capacity.
T
h
is
will
require
extra pressure on
your pan
resulting
in excessive wear to t he bottom of the
cuners and
lin
ks
plus
rapid wear
to
the
guide bar
rails.
Fig.
16.
Correct
FIG.
16
insufficient
(0'-'0\
~-,~
common
problems
found with
BAR
and SPROCKET
FAILURE
CAUSE
REMEDY
®
Worn
Sprocket
Excessive
C~ain
Sprocket
Must
Be
Teet~
Tension
-
lnsul·
Replaced.
licienl Lubrica
·
File Cullers.
lion. Dull
Cutters.
(I
Scored Drum
.
Overloaded
Refer
to
filing
Clutch
T~rou&h
Inslr.
Release
Poor Filing,
Chain
Ttlrottle if Chain
Pinch, Etc.
Pinc~ed
lJ
bcesslve Wear
Poor Filing
Refer
to
or
Jointing.
Fihng Inslr
on One Bar
Check for
Varia·
Replace
Bar
Rail.
lions, Both Sides.
If
Required.
4
Chain Run Slack
I.
p
Bar
Peened
al
-
Crowds at
This
Increase Tension
C~ain
[nlry.
Poin!.
Slighlly.
I~
~
Worn
and
Burnt
Excessive Tension
Bar
Must be Re
Tip or
Chipped
-
Insufficient
placed if
Rail
0
Rail.
Lubrication-
I
Chipped,
or
Abnormal
Abuse.
Siellile
Worn
Away.
CHAIN DIAGNOSIS
TROUBLE
Chain stretched beyond
adjustment.
Chain breakage.
Chain
stiff.
AND/OR
Hard to
tension.
Chain sta
ll
s in
cut
and
/
or scored clutch
drum.
Chain cuts
rough
or
digs in.
Chain
jumps
bar.
Chain cuts
on an
angle.
Worn drive sprockets.
Excessive wear on drive
links
and/
or
side straps.
PROBABLE CAUSE
Dull cutters.
Lack
of lubrication.
Excessive pressure by Operator.
Excessive jOint. Lack of lubrication.
Du
l
l
cutters.
Lack of
lubrication.
Loose
chain.
Poor
mainten
ance.
Clutch slipping
.
Excessive pressure by operator.
Clutch spring not
rel
easing.
Cutter angles incorrectly filed.
Too
much or
uneven joint.
Incorrect chain
tension. Damaged cu
tter
bar.
Damaged
drive links.
Worn or da
maged
sprocket.
REMEDY
Remove
a side and drive
link.
Fi le Chain. Increase Lubrication.
Replace damaged parts. Check balance of oil.
In
crease lubrication
.
Rejoint
chain.
File
chain.
Clean cha
in
in solvent.
Oil
bath
over-night.
Correct tension.
Check oil
pump
and vent holes.
Check clutch shoes for wear. Check spring
for
tension.
Appl
y
less pressure; correctly filed chain will self-feed.
Check your
filing
instructions. Refire to correct angles.
Check
joint. Rejoint
your chain.
Correct chain
tension.
Check bar
for darnage,
repair or rep
l
ace.
Check
drive
links for
damage. Replace
links
or entire chain.
Cutter angles and/or length not the
same
on
Refile cutters
to same
angle. Check
rails. If
worn,
have
bar
both sides. Uneven joint. Cutter bar rails uneven.
serviced or replaced. Rejoint.
Increase
lubrication.
Incorrect chain tension.
Lack
of
lubr
ication.
Dull cutters.
Lack of
lubri
cation. Excessive tension. Dull
chain. Worn sprocket.
Replace sprocket.
Dorrect
chain tension. Increase
lubrication.
File cutters and
joint
chain.
Increase lubrication. Check oil pump. Extensive damage can be
occasioned in a
few hours.
Check tension. File chain. Check
sprocket.
12
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