Janome CoverPro 3000 PROFESSIONAL Troubleshooting guide
SERVICE MANUAL
&
PARTS LIST
MODEL: CoverPro 3000 PROFESSIONAL
(Continental Europe)
(Australia)
(UK)
Sixth Edition: 12 October 2021
First Edition: 25 May 2021
Modied info.
Modied: 28 May 2021
P44-6: image added.
P45-20: 624245001 Thrust stopper →000038502 Washer
Modied: 22 June 2021
P49-4: 778636014 →778636003
P49-5: 778108012 →778108001
Modied: 14 July 2021
Service manual: modied.
Modied: 20 August 2021
P31: NOTE: Insert the 2 mm spacer obetween the ring !0 and top cover stitch cam !1 to adjust the clearance. →
NOTE: Adjust as below while pressing the top cover stitch cam !0 against the ring o.
Modied: 12 October 2021
P23-15: 778800055 →778800000
P23-15: 778800066 →778800011
INDEX
Replacing the External Parts
Face cover............................................................................................................................................. 1
Top Cover .............................................................................................................................................. 2
Belt Cover.............................................................................................................................................. 3
Free Arm Cover..................................................................................................................................... 4
Looper Cover......................................................................................................................................... 5
Base plate ............................................................................................................................................. 6
Front Cover............................................................................................................................................ 7
Rear Cover ............................................................................................................................................ 8
Mechanical Adjustment
Presser Bar Height ................................................................................................................................ 9
Presser Foot Pressure ........................................................................................................................ 10
Needle Bar Height............................................................................................................................... 11
Feed Dog Height ................................................................................................................................. 12
Looper Height...................................................................................................................................... 13
Looper Position ................................................................................................................................... 14
Needle to Looper Timing..................................................................................................................... 15
Clearance between the Needle and Looper ....................................................................................... 16
Rear Needle Guard Height.................................................................................................................. 17
Needle to Feed Dogs Timing............................................................................................................... 18
Stitch Length ....................................................................................................................................... 19
Differential Feed Ratio......................................................................................................................... 20
Thread Tension.................................................................................................................................... 21
Motor ................................................................................................................................................... 22
Thread take-up lever ........................................................................................................................... 23
Replacing the needle threader ............................................................................................................ 24
Adjusting needle threader switch lever ............................................................................................... 25
Replacing the top cover stitch mechanism unit................................................................................... 26
Adjusting the top cover stitch mechanism unit 1................................................................................. 27
Adjusting the top cover stitch mechanism unit 2................................................................................. 28
Adjusting the top cover stitch mechanism unit 3................................................................................. 29
Adjusting the top cover stitch mechanism unit 4................................................................................. 30
Adjusting the top cover stitch mechanism unit 5 ................................................................................ 31
PARTS LIST .............................................................................................................................. 32 to 53
INDEX
Replacing the External Parts
Face cover............................................................................................................................................. 1
Top Cover .............................................................................................................................................. 2
Belt Cover.............................................................................................................................................. 3
Free Arm Cover..................................................................................................................................... 4
Looper Cover......................................................................................................................................... 5
Base plate ............................................................................................................................................. 6
Front Cover............................................................................................................................................ 7
Rear Cover ............................................................................................................................................ 8
Mechanical Adjustment
Presser Bar Height ................................................................................................................................ 9
Presser Foot Pressure ........................................................................................................................ 10
Needle Bar Height............................................................................................................................... 11
Feed Dog Height ................................................................................................................................. 12
Looper Height...................................................................................................................................... 13
Looper Position ................................................................................................................................... 14
Needle to Looper Timing..................................................................................................................... 15
Clearance between the Needle and Looper ....................................................................................... 16
Rear Needle Guard Height.................................................................................................................. 17
Needle to Feed Dogs Timing............................................................................................................... 18
Stitch Length ....................................................................................................................................... 19
Differential Feed Ratio......................................................................................................................... 20
Thread Tension.................................................................................................................................... 21
Motor ................................................................................................................................................... 22
Thread take-up lever ........................................................................................................................... 23
Replacing the needle threader ............................................................................................................ 24
Adjusting needle threader switch lever ............................................................................................... 25
Replacing the top cover stitch mechanism unit................................................................................... 26
Adjusting the top cover stitch mechanism unit 1................................................................................. 27
Adjusting the top cover stitch mechanism unit 2................................................................................. 28
Adjusting the top cover stitch mechanism unit 3................................................................................. 29
Adjusting the top cover stitch mechanism unit 4................................................................................. 30
Adjusting the top cover stitch mechanism unit 5 ................................................................................ 31
PARTS LIST .............................................................................................................................. 32 to 53
1
Replacing the External Parts
1. Face cover
To remove:
zRemove the setscrew q.
Placeyourngerinthegroovewandslidethelamp
arm cover etotheright.
Remove the setscrew r.
DisconnecttheconnectorAtandconnectorBy.
Remove the face cover u.
To attach:
x Followtheaboveproceduresinreverse.
r
w e
e
q
u
ty
2
2. Top Cover
To remove:
z Raisethecarryinghandleq.
Remove the setscrews w(2pcs.).
Remove the hooks e(6pcs.).
Removethetopcoverr.
To attach:
x Followtheaboveproceduresinreverse.
w
w q
er
r
e
r
q
Replacing the External Parts
3
3 . Belt Cover
To remove:
zRemove the setscrew q.
Loosenthesetscrewsw(2pcs.).
Remove the belt cover e.
To attach:
x Followtheaboveproceduresinreverse.
w
w
q
e
Replacing the External Parts
4
4. Free Arm Cover
To remove:
z Pulltheextensiontableqawayfromthemachine.
Remove the setscrews w(3pcs.).
Remove the free arm cover e.
To attach:
x Followtheaboveproceduresinreverse.
w
e
q
Replacing the External Parts
5
5. Looper Cover
To remove:
zRemove the setscrews q(2pcs.)
Removetheloopercoverw(withahingeattached).
To attach:
x Followtheaboveproceduresinreverse.
q
w
w
(Viewfromthebottomside)
Replacing the External Parts
6
6. Base plate
To remove:
z Loosenthesetscrewsq(2pcs.).
Removethehingescrewsw(3pcs.),washers5e
(3pcs.),rubberfeetr(3pcs.)andrubberfoot
washers(3pcs.)t.
Remove the setscrews y(3pcs.).
Removethebaseplateu.
To attach:
x Followtheaboveproceduresinreverse.
u
q
y
y
w
e
r
t
Replacing the External Parts
7
7. Front Cover
To remove:
z Removethefacecover,topcover,beltcover,
freearmcoverandloopercover(seepages1to5).
x Loosenthesetscrewsq,w(2pcs.).
Remove the setscrews e(2pcs.).
Disconnecttheconnectorr.
Removethefrontcovert.
To attach:
c Followtheaboveproceduresinreverse.
q
w
e
r
t
Replacing the External Parts
(Viewfromtherearside)
8
8 . Rear Cover
To remove:
z Removethefacecover,topcoverandfreearmcover
(seepages1,2and4).
xRemove the setscrews q(2pcs.).
Removethespoolstandw.
Remove the setscrews e(2pcs.).
Remove the setscrews r(2pcs.).
Remove the rear cover t.
To attach:
x Followtheaboveproceduresinreverse.
qw
e
t
r
Replacing the External Parts
9
Mechanical Adjustment
1. Presser Bar Height
Thedistancebetweenthebottomofthepresserfoot
inuppositionandtheneedleplateshouldbe4.7to
5.3 mm.
z Removethefacecover(seepage1).
x Raisethepresserfootandloosenthehexagonal
socket screw q.
Place a block 5 mm wthickunderthepresserfoot
andlowerthepresserfootliftere.
c Tightenthehexagonalsocketscrewqrmly.
NOTE:
Makesurethatthepresserfootshouldbeparallelto
thefeeddogslotsrintheneedleplateandshouldnot
interferewiththeneedles.
v Attachthelampsetplate,frontcoverandfaceplate.
q
e
w
r
4.7 to 5.3 mm
Shouldbe
parallel.
Shouldnotinterfere
10
2. Presser Foot Pressure
Thepressureadjustingscrewshouldprotrude10mm
fromthetopofthemachine.
z Turntheadjustingscrewqtosetitsheightat10mm.
10 mm
q
11
q
t
r
e
w
7.8 to 8.2 mm
Lowertheneedle
threaderleverwto
aligntheneedle
threadershaft
hole ewiththe
hexagonalsocket
screw r.
3. Needle Bar Height
Thedistancebetweenthepointoftheleftneedle
(SchmetzELx705,size80/12)andtheuppersurfaceof
theneedleplateshouldbe7.8to8.2mmwhenthe
needlebarisatthehighestposition.
z Removethefacecoverandtopcover(seepages
1to2).
x ReplacetheleftneedlewithSchmetzELx705,size
80/12needleq.
c Turnthehandwheeltowardyoutoraisetheneedle
bartothehighestposition.
v Lowertheneedlethreaderleverwtoalignthe
needlethreadershaftholeewiththehexagonal
socket screw r.
b Loosenthehexagonalsocketscrewrandmove
theneedlebartupordowntoadjustthedistance
at 8.0 mm.
NOTE:
Besurenottorotatetheneedlebarwhenadjustingthe
needlebarheight.
n Attachthetopcoverandfacecover.
12
0.9 to 1.1 mm
r
e
e
q
r
w
4. Feed Dog Height
Turnthehandwheeltowardyoutoraisethefeeddogto
itshighestposition.
Whenthepresserfootislowered,themaximumheight
ofthefeeddogshouldbe0.9to1.1mmabovethe
needleplate.
z Setthestitchlengthdialat3anddifferentialfeeddial
at
1.0.
x Lowerthepresserfootandturnthehandwheel
towardyoutoraisethefeeddogtoitshighest
position.
c Opentheloopercover.
Pullthelooperreleaseknob qandturnthelooper
theright.
Loosenthesetscrewsw(4pcs.).
v Movethemainfeeddogeandsubfeeddogrup
ordowntosettheheightat1.0mm.
b Tightenthesetscrewsw(4pcs.)rmly.
Closetheloopercover.
13
5. Looper Height
Theheightofthetipoftheloopershouldbe73.1to
73.5 mm.
z Removethefreearmcover(seepage4)andthe
needleplate.
x Replacetherightneedlewiththeshorttestpin
(28.3mmlong)q.
c Turnthehandwheeltowardyoutobringthelooperw
toitsrightmostposition.
vPullthelooperreleaseknob eandturnthelooperto
the left.
Loosenthesetscrewrandmovethelooperupor
downtomatchitspointtwiththetipyof the test
pin.
b Tightenthesetscrewrrmly.
n Replacethetestpinwitharegularneedle.
Attachthefreearmcoverandneedleplate.
q
w
e
r
t
73.1 to 73.5 mm
y
14
6. Looper Position
Thedistancebetweenthetipofthelooperandcenterof
therightneedleshouldbe1.8to2.2mmwhenthe
looperisatitsrightmostposition.
z Removethefreearmcover(seepage4)andthe
needleplate.
x Replacetherightneedlewiththeshorttestpin
(28.3mmlong)q.
c Turnthehandwheeltowardyoutobringthelooperw
toitsrightmostposition.
v Loosenthesetscreweandmovetheloopertothe
leftorrighttoadjustthedistancebetweenthetest
pinandtipofthelooperto2.0mm.
NOTE:
Donotmovethelooperupordownotherwisethe
looperheightwillchange.
Use a stem roftheregularneedletocheckifthereisa
propergapbetweenthetipofthelooperandtestpin.
n Tightenthesetscrewermly.
m Replacethetestpinwitharegularneedle.
Attachthefreearmcoverandneedleplate.
q
w
e
r
1.8 to 2.2 mm
15
1.3 to
1.5 mm
1.3 to
1.5 mm
1.3 to
1.5 mm
7. Needle to Looper Timing
Whenthepointoftheloopermeetswiththerightside
oftheneedleontheright,theneedlebarrises1.3to
1.5mmfromthelowestposition.
z Removethefreearmcover(seepage4)and
needleplate.
x Replacetherightneedlewiththelongtestpin
(30.24mmlong)q.
c Turnthehandwheeltowardyouuntilthelooper
pointwmeetswiththerightsideofthetestpin.
v Loosenthehexagonalsocketscrewse(2pcs.)and
turnthelooperrockingcamrtomatchthelooper
pointwiththetipofthetestpin.
Iftheloopertimingistoolatet,turnthelooper
rockingcamrclockwise.
Iftheloopertimingistooearlyy,turnthelooper
rockingcamrcounterclockwise.
b Tightenthehexagonalsocketscrewse(2pcs.)
rmly.
n Replacethetestpinwitharegularneedle.
Attachthefreearmcoverandneedleplate.
qw
t y
e
r
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