Singer 591 User manual

SINGER 591
Service
Manual
From the library of: Superior Sewing Machine & Supply LLC

CONTENTS
Page
DESCRIPTION OF MACHINE 1
ADJUSTMENTS
To Set Needle Barat CorrectHeight 2
To Set Check Spring Height 2 —3
To Set CheckSpringTension 3
To Set PresserBarat Correct Height 4
To Time the SewingHook and also Set the SewingHook Sidewise in Relation to the Needle 5
Feed Reverse Lever 6
To Time the Feed 6
To Set Feed Dogat Correct Height 7
Needle BarFrame Driving Linkage Adjustments 22 —23
REMOVAL AND REPLACEMENT OF PRINCIPAL ASSEMBLIES
To remove the Sewing Hook 8
To Replace Oil Filter
143042 9
To Replace the Sewing Hook 9
To Remove and Replace the Hook Shaft 10
The Oil Pump 11
To Remove and Replace the Upright Arm Shaft 12 —13
To Remove and Replace the Needle Bar 13
To Remove and Replace the Presser Bar 14
Needle Thread Take-up . . . 14 —16
To Remove and Replace Arm Side Shield Wick, Needle Bar Wick and Needle Bar Connecting
Stud Wick on Drop Feed Machines 16
To Remove Oil Wick Holder 17
To Install New Oil Wick Holder 17 — 18
The Arm Shaft 18 —21
The BobbinWinder 22
SERVICE INSTRUCTIONS FOR COMPOUND FEED SYSTEM
Needle BarFrame Driving Linkage Adjustments 23
To Remove and Replace Arm Side Shield Wick,NeedleBar Wickand Needle Bar Connecting
Stud Wick on Compound Feed Machines 24
To
Remove and Replace Needle BarFrame Assembly and Needle Bar 25
To
Remove and Replace Compound Feed Connecting Rod 25
★ A Trademark of THE SINGER COMPANY
Copyright © 1981 THE SINGER COMPANY
All Rights Reserved Throughout the World
From the library of: Superior Sewing Machine & Supply LLC

^9^
SINGER
DESCRIPTION
Class 591 Machines are high speed, rotary hook, fully automatic lubricated long arm flat bed lockstitch machines
with drop feed in'D' varieties, compound feed in'C varieties and hand operated reverse feeding mechanism. Recom
mended for general stitching operations ona range of light to heavyweight fabrics.
GENERAL FEATURES
Federal stitch type 301,
Balanced horizontal axisrotating hook.
Pendantlinkfeedwithfeed leveling hinge pin.
Dialtype stitch regulatoron feed reverse lever.
Improvedthread take-upleverguard.
Fully automatic lubricatingsystem.
Adjustable eccentric for matching the feed of the needle and feed dog. (Compound feed machines)
Kneelifter mechanism isintegralwith the machinebaseand oil reservoir.
Arm top cover with oil flow indicator and bobbin winder.
The armis provided with aseatfor mounting a light fixture.
SPECIFICATIONS
Needle bar stroke:
Oearance under presser foot:
(Maximum lift of presserfoot whenraisedwith
knee lifter —12.7mm)
Maximum stitch length:
Maximum speed:
Oil:
Bed size:
30.5mm - 591D200A, 591C200A
36.5mm -591D300A, 591D308A, 591C300A
7.2mm -591D200A, 591C200A
7.9mm -591D3G0A,591D308A, 591C300A
6S.P.I. - 591D200A, 591C200A
5 SJ.I. -591D300A, 591C300A
3.2 SP.I. (Reverse4 SP.I.) - 591D308A
5,500 SPA1.-591D200A
5,000 SP.M. -591D300A, 591C200A
4,500 S.PJd. - 591C300A
3,000 SP.M. - 591D308A
SINGER* Type "C" OU
476mm x 178mm
-1 -
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TO SET NEEDLE BAR AT CORRECT HEIGHT
PREPARATION:
Removeface plate, slide plate and throat
plate. See that needle is correctly set in
needle bar.
On drop feed varieties, lower end of
bushing A, Fig. 2, must be set as shown in
Fig, 2. To reset bushing, loosen screw B.
On compound feed varieties, this dimen
sion is automatically obtained when needle
bar frame is assembled.
CHECK:
When needle bar is at its lowest point
(during rotation of machine pulley), UPPER
TIMING MARK on needle bar should be
level with lower end of bushing.
Check timing of hook as instructed on
page 5.
Fig. 2
TIMING
MARK
58.73mm - 591D200A, 591C200A
66.01mm - 591D300A, 591C300A
THROAT PLATE
SEAT
SETTING:
Loosen clamping screw C, Fig. 2. Raise or lower needle bar so that UPPER TIMING MARK is level with lower
end of bushing. Then securely tighten screw C.
Replace throat plateand slideplate.
When replacing the face plate, make certain that the screw holes in the face plate gasket are aligned with the re
spective screw holes in the face plate; avoiding injury to the gasket and consequent oil leakage.
TO SET CHECK SPRING HEIGHT
PREPARATION:
Threadthe machine and place a lightweight material under presser foot.
CHECK:
Turn machine pulley over toward operator slowly. When take-up lever begins to rise, check spring D, Fig. 3 makes
a slight dip and a return to its higher position. Later, as take-up lever approaches top of stroke, check spring
Dshouldbe drawn allthewaydown;settingthe stitch.As lever descends, checkspringD returnsto rest.
-2
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SETTING:
Loosen screw E, Fig.3. Turn stud F, Fig.3 (at the
same time turning entire tension assembly) either
over toward left to lower check spring and decrease
its movement,
or over toward right to raise check
springand increaseits movement. Securelytighten set
screw E.
NOTE: Under certain conditions of tacking, it
may be necessary to set the check springhigherthan
it is otherwise normally set.
CAUTIGN: Check spring height setting must be
checked each time a different foot is applied to
machine.
TO SET CHECK SPRING TENSION
PREPARATION:
Thread the machine. Securely tighten set screw E,
Fig. 4. Make certain thumb
nut is on stud F, Fig. 4.
CHECK:
Tension on check spring D. Fig. 4, should be suf
ficient to ensure action at top speed; but still light
enough to permit itself to be drawn all the way down
(as take-up lever approaches height of stroke) before
any thread is drawn through the tension discs.
SETTING:
Using a large screwdriver in slot of stud F, turn
stud either over toward left to decrease tension or
over to right to increase it, as shown.
MORE
tension
LESS
TENSION
H GHER
LOOSEN
LOWER
Fig. 3
TIGHTEN
Fig. 4
NOTE: The tension on the check spring may require different settings depending upon the size of thread used.
Heavier thread requires more tension to ensure correct thread control.
-3
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TO SET PRESSER BAR AT CORRECT HEIGHT
S) (9
CLEARANCE
FOOT
RESTING
FIRMLY
UPON
THROAT
PLATE
AT HIGHEST
POINT
<S) Si
AT LOWEST
POINT
JUST I
✓ CLEAR I
PREPARATION:
Remove face plate and slide plate.
CHECK:
1. When presser foot rests firmly upon throat plate (with feed dog below throat plate) there should still be
some clearance between guide bracket G, Fig. 5 and lifting lever link H, as shown in Fig, 5.
2. When presser foot is at its highest point and needle bar is at its lowest,
top of presser foot should clear
lower end
of needle bar, as shown in Fig. 6.
SETTING:
LoosenclampingscrewJ, Fig. 5. Raiseor lower guide bracket G, as required. Securely tighten screwJ.
CAUTION: Whenever guidebracket has been moved on presserbar, inspect the check spring for correct set
ting, as instructed on pages 2 and 3.
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TO TIME THE SEWING HOOK AND ALSO SET THE
SEWING HOOK SIDEWISE IN RELATION TO THE NEEDLE
PREPARATION:
Remove presser foot, slide plate, throat plate and
feed dog.
On compound feed varieties, set stitch length to
zero (setting feed to zero is not required on drop
feed machine).
CHECK:
When lower timing mark on needle bar is level
with lower end of lower needle bar bushing A as
shown in Fig. 7, the point of the sewing hook should
be at the center of the needle, as shown in Fig. 7.
Also, when point of sewing hook passes needle,
clearance between hook point K, Fig. 8 and needle
should be approximately equal to thickness of a
piece of ordinary notepaper (about .13mm), as shown
in Fig. 9.
NOTE: Not only point of sewing hook but entire
"FLAT" of hook point should clear scarf on needle
blade. Normally, a .5mm clearance is provided be
tween hub
of hook and oil retaining collar.
SETTING:
Loosen two set screws L, Fig. 7 in hub of hook.
Then retighten one of the set screws very lightly so
that the sewinghook can still be turned on the shaft.
Hold shaft immovable and turn hook as required
to bring point of hook to center of needle as shown
in Fig. 7 and at the same time adjust clearance be
tween needle and hook point as shown in Fig. 9.
Tighten set screws L lightly, turn machine pulley
to make certain the sewing hook is correctly set in
relation to the needle. Then securely tighten set
screws L.
LOWER
TIMING
MARK
HOOK POINT
AT CENTER
OF NEEDLE
Fig. 9
ON UPWARD
STROKE
Fig. 7
HOOK
POINT
Fig. 8
NOTEPAPER
FLAT OF
HOOK POINT
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FEED REVERSE LEVER
Before the machine leaves the factory, the spring tension of
the feed reverse lever is set at an appropriate tension for easy and
comfortable sewing operation.
If it is necessary to adjust the feed reverselever spring tension,
tip machine back and loosen feed reverse lever spring retainer
screw Y3 holding the spring retainer Z3 on the machine leg.
Move spring retainer Z3 up or down, as required, and firmly
tighten screw Y3.
The lighter the tension, the easier it is to operate the feed
reverse lever, however the tension should be set alittle heavier for
maximum stitchlength and high speed sewing.
Normally, the 591D200A/C200A machines are adjusted to
sew a maximumstitch length of 4.2mm (6 s.pi.)and 591D300A/
C300A machines to sew 5.1mm (5 s.pi.). This however, can be
changed to 5.1 mm
if desired, by turning over the feed regulat
ing dial stopper C4 on the underside
of the feed reverselever, as
shown in Fig. 10.
0
Fig. 10
NOTE: The 591C200A machine can not sew a maximum stitch length of 4.2mm when fitted with standard
fittings.
CAUTION: Makesure the feed dogclearsthe front and rear edgesof the throat plate slots whenmaximumstitch
length is changed to 5.1mm.
TO TIME THE FEED
Before the machine leaves the factory, the feed and feed
lifting eccentric is set for average sewing conditions; having
the timing screw (screw Mwhich appears immediately after set
screw N, Fig. 11, when feed eccentric is rotated toward the
operator) align on the timing mark provided for it on the arm
shaft. (Timing line on shaft for drop feed is at top when
needle bar is in DOWN position, whereas timing mark for
compound feed is at top when needle bar is in Up position.)
The timing screw M, Fig. 11, on the feed and feed lifting
eccentric should be securely tightened after it has been aligned
on the timing mark on the arm shaft. The set screw N, should
also be securely tightened.
-6-
Fig. 11
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If for any reason, it is necessary to alter the timing of feed and feed lifting eccentric, the eccentric should be
adjusted and locked in desired setting with the timing screw Mand the set screw N.
NOTE: Whenever the timing of the feed is changed, sewing hook should be checked for necessary adjustment
also as instructed on page 5.
TO SET FEED DOG AT CORRECT HEIGHT
FULL DEPTH OF TEETH 0.8mm -591D200A, 591C200A THROAT PLATE
I 1.0mm - 591D300A, 591D308A, 591C300A .
t'
Fig. 12
When the feed dog is at its highest position, approximately the
full depth of allthe teeth should project abovethe top surfaceof the
throat plate, as shown in Fig. 12.
Before checking the height of the feed dog, set the machine for
the longest stitch.
To adjust, loosen the clampingscrew P, Fig. 13 and raise or lower
the feed dog (which is fastened to the feed bar Q, Fig. 13) as re
quired. Then securely tighten screw P.
The feed dog should be level at the top of
its feed path. If not, tip machine back and
loosen feed bar hinge pin clamping screw A4
just enough to tum feed bar hinge pin (ec
centric) B4, Fig. 13. Insert screwdriver into
access hole in end
of bed and tum hinge pin B4
as required to level the feed dog. Securely
tighten clamping screw A4. Check feed dog
height.
If it is found necessary to adjust the feed
dog height due to the material being sewn
and/or exchanging the feed dog and throat
plate, it should be adjusted in the manner ex
plained above.
m
LOWER
HIGHER
Fig. 13
NOTE: Feed dog should not contact edges of the throat plate slots during its movement but should be located
centrally in relation to the front, rear and sides of throat plate slots.
-7-
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INSTRUCTIONS
FOR
REMOVAL AND REPLACEMENT
OF
PRINCIPAL ASSEMBLIES
CAUTION TO MECHANICS
Machines of Class 591 are made with extreme precisionin machiningand assembly,and the "Superfinish" process
provides microscopically smooth bearing surfaces. Therefore, special careshouldbe taken not to permitany mis
alignment of parts or to
cause any scratches or nickson the bearing surfaces by careless assembly or handling of
parts. Anysuch damage mightrenderthe machine incapable of the long,trouble-free service for whichit is designed.
TO REMOVE THE SEWING HOOK
I
NO. 143042
Fig. 14
Fig. 15
Remove the needle, slide plate, throat plate and bobbin case. Remove the screw R, Fig. 14 and the bobbin case
holder positionbracket S, Fig.14. Loosen the twoset screws L, Fig.14in the hub of the hook and turn the machine
pulley over toward the operator until the feed bar Q is raised to its highest point.
Turn the sewing hook until the thread guard U, is at the bottom, as shown in Fig. 15. Turn the bobbin case
holder V, Fig. 15 until the notch Wisalsonear the bottom, asshownin Figs. 15 and 16. The sewing hook can then
be removed from the hook shaft.
-8
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TO REPLACE OIL FILTER 143042
While the sewing hook is off the shaft, it is advisable to replace the oil filter 143042, Fig. IS in the end of the
hook shaft. Unscrew the filter from the center of the shaft at X, Fig. 15 and replace with a complete new filter
143042.
TO REPLACE THE SEWING HOOK
\1
Fig. 16
When placing a new sewing hook on the shaft, have the sewing hook thread guard U at the bottom and the
bobbin case holder V tumed to the position shown in Fig. 16, so that the hook will clear the feed bar Q.
Place the hook in position on the shaft and turn the bobbin case holder V until the notch W is at the top, as
shown in sketch at left above. Replace the bobbin case holder position bracket S, making certain that the finger Y
(see above) enters the notch W at the top of the bobbin case holder. Then securely fasten the position finger by
means of the screw R.
Replace the needle. Time the sewing hook, as instructed on page S. Replace the bobbin case, throat plate and
slide plate.
-9
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TO REMOVE AND REPLACE THE HOOK SHAFT
HOLD GEARS IN MESH
HOOK SHAFT
£)
Fig. 17
Remove and replace the hook shaft in the following manner:
1. Remove the sewinghook, as instructed on page 8.
2. Mark the two lower bevel gears Z and T, Fig. 17, with chalk or crayon, on one tooth of one gear and the cor
responding space for that tooth in the other gear. This isimportant, as these gearsmay become separated during
removal of shaft. These marks will then make it possible to obtain the original mating position of the gears.
3. Lx}osen the two set screws #1 and #2 in hook shaft bevel gear. While holding the two gears Z and T in mesh, as
instructed in Fig. 17, withdraw the old hook shaft and INSERT THE NEWSHAFT.
4. Make certain that set screw #1 seats over flat on the hook shaft. Remove all end shakefrom hook shaft, pushing
gear T, Fig. 17 toward the hookon the shaft. Securely tighten first set screw #1, then securely tighten the second
screw #2.
5. Replace the sewing hook, as instructed on page 9.
6. Time the sewing
hook as instructed on page 5.
NOTE: Set screw #1 is the first of the two set screws to appear on the hub of the bevel gear T as the machine
pulley is turned over toward operator.
-10-
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THE OIL PUMP
TO LOOSEN
nFig.
18
TO REMOVE
1. Loosen the two oil pipe clamping sleevenuts A2, Fig. 18.
2. Remove the three screws B2, Fig. 17.
3. Remove the screen frame, screen and oil pump cover C2, Fig, 17.
4. Remove the locking screw D2, Fig. 18.
5. Remove the impellerE2,by turning it overtoward the RIGHT(clockwise) to loosenit, asinstructed in Fig. 18.
CAUTION: The impeller E2 is designed to be screwed to the shaft by means of a LEFT-HAND THREAD and
must be turned over toward the right to be loosened. Avoid damage to this impeller,as the efficient automatic
lubrication of the machine is dependent upon it.
6. Remove the three screws F2.
7. Carefully pull the oil pump body off the lowerend of the uprightarm shaft.
TO REPLACE
1. Place oil pump body on underside of machine bed,so that position pins 02, slip into proper holes in machine
casting, as shown above.
2. Replaceand securelytighten the three screwsF2. Makecertain that machineturns freelyas screwsare tightened.
3. Carefully replace impeller E2, turning it over toward the LEFT to screw it onarmshaft (see CAUTION above).
4. Make certain that impeller E2 is not so tight that it will bindarm shaft. Make certain also that impeller clears
both top and bottom of interiorof oil pumpbody,then lockit in position by means of locking screw D2.
5.
Replace pump cover, screen and frame C2andthree screws B2,Fig.17. Securely tighten screws B2.
6. Replace two oil pipesin oil pumpbody, asshownabove,andsecurely tighten sleeve nuts A2.
11 -
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TO REMOVE AND REPLACE THE UPRIGHT ARM SHAFT (See Fig. 19)
REMOVAL:
If it is found necessary to remove the upright
arm shaft H2, it should be removed in the following
manner:
1. Remove oil pump as instructed on page 11.
2. Follow the instructions in Steps 2 and 3 for re
moval
of hook shaft on page 10 except that,
instead of removing hook shaft, merely remove
hook shaft bevel gear T, Fig. 17.
3. Remove arm top cover.
4. Mark the two bevel gears J2, with chalk or
crayon on one tooth of one gear and the cor
responding space between the teeth of the other
gear so that these gears may be reassembled in
their original relative positions without dif
ficulty, if necessary. Fig. 19
5. Loosenset screws K2 in bevel gearat upper end of uprightarm shaft. Toloosenset screws K2, remove screwL2
in the rear of the arm and insert screwdriver through the hole.
6. Make certain bevel gear at lowerend of upright arm shaft is fastened securely. Then while holding upper bevel
gears J2 in mesh,drawuprightarmshaft downand out of machine.
REPLACEMENT:
1. Before installing upright arm shaft, make certain it has the bevel gear Z, Fig.17, correctlyfastened at the lower
end of shaft.
2. Insert upright arm shaft up through upper bevelgear, as shown in Fig. 19.
3. Turn shaft so that one of the two set screwsK2 will bear upon the upper gear flat on the shaft and tighten the
set screws K2.
4. Replace and set hookshaft bevel gear as instructed in Step 5 on page 10.
5. Replace oil pump, as instructed on page 11.
6. Replace top cover.
12-
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TO REMOVE AND REPLACE THE NEEDLE BAR (See Fig. 20)
(On Drop Feed Machines)
Q2 M2
Remove the needle bar in the following manner:
1. Remove needle, needle set screw and needle bar thread
guard.
2. Remove face plate.
3. Loosen clamping screw C.
4. Loosen screw M2 sufficiently to allow needle bar to pass,
then slip needle bar up through both needle bar bushings
and out of machine.
NOTE: If it becomes necessary to remove upper needle
bar bushing N2, first remove screw M2 and take-up lever oil
guard P2. Then loosen set screw Q2 and drive bushing N2
down and out of head of machine. Use a 10mm driving pin.
Before replacing needle bar, replace upper needle bar
bulling N2, by driving it downinto hole provided for it in
head of the machine. Make certain top of bushing N2 is level
with top of arm. Tightenset screwQ2.
Fig. 20
Replacethe needle bar in the following manner:
1. Slip needle bar down through both bushings in head ofthe machine. Tighten screw C.
2. Replace needle bar threadguard, needle set screw and needle.
3. Set needlebar at correct height asinstructed on page2.
4. Replace oil guard P2and fasten it securely to bushing withset screw M2.
5. Replace face plate.
TO REMOVE AND REPLACE THE PRESSER BAR
To remove the presser bar:
1. Remove presser foot, face plate and presser bar pressure regulating thumb screw R2, with presser bar guide from
head of the machine.
2. Loosen clamping screw J about oneturn (just enough to make it loose).
3. Slide presser bar up through lifting lever link H, Fig. 20, and bushing and outof machine.
-13
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To replace the piesser bar:
1. Slip presserbar down through lifting leverlink H, Fig. 20 and lower presserbar bushing.
2. Replace presser foot and presser bar pressure regulating thumb screwR2 with presser bar guide.
3. Set presser bar at correct height, as instructed on page 4, and tighten screw J.
NEEDLE THREAD TAKE-UP
Fig. 21
Fig.. 22
U2
To remove the needle thread takemp:
1. Removeface plate and arm hole plugS2, Fig. 22, from machine.
2. Remove needle bar, upper needle bar bushing(drop feed), needle bar frame (compound feed) Fig. 37, page 24
and presserbar pressureregulatingthumb screwR2, Fig.20, page 13.
3. Tum machine pulleyas required to reach screwT2, Fig. 22, in needlebar crank throughhole left by removal of
plug S2. Loosen set screw T2.
4. Using wrench 545945(through same hole)andturning machine pulley asrequired,loosenthe large hexagon head
clamping screw U2, Fig. 22 on needle bar crank.
CAUTION: DO NOT DISTURBthe smallerhexagon head position screwV2, Fig. 22, which holds the needle bar
crank at its correct position on the horizontal arm shaft.
5. Loosen small set screw W2, Fig.
21, in the rear of the arm of the machine.
6. Remove holder screw H3. Pullinggently, draw entire oil wickholder assembly out of the head of the machineas
instructed on page 17.
-14
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7. Pullout the end of the oil wick,leadingout fromstud Y2, from the oil tube K3shownin Fig.25.
8. While holding back the needle thread take-up link inside the head at Z2, Fig. 21, pull upon the head of stud Y2,
taking care not to pull loose its wick, until the stud is removed.
9. Back the end of the take-up A3, Fig. 21 toward the inside of the machine, turning the machine pulley as re
quired until the take-up is free of the slot provided for it.
10. The needle thread take-up link assembly (including parts B3, Z2, A3, C3, D3 and E3) can now be pulled free of
the needle bar crank.
To replace the needle thread take-up:
1. Make sure that the wearing plate C3 is in place and undamaged on the face
of the needle bar crank, as shown in
Fig. 21.
2. Bace the needle thread take-up link Z2 and take-up A3in the head of the machineso that the stud E3, Fig.21
in the center
of the linkageslipsinto the hole providedfor it in the needlebar crank, asshownin Fig.21.
3. Slip the upper end of the take-up A3 through the slot provided for it in the head of the machine.
4. Insert stud Y2 and its oil wick through needle thread take-up lever link Z2 and into its hole in the machine
casting so
that the flat on the stud faces the rear of machine. DO NOT INSERT THE STUD TO ITS FULL
DEPTH AT THIS TIME. "There should be about .25 to .38mm side play of the take-up lever link Z2 on the stud,
until final adjustment is made in Step 17.
5. Remove arm plug screw J3, and with the tip of a screwdriver, push the end of oil wick leading from stud Y2
into oil tube K3 so that wickis slack overedge of tube at point L3 to insure free passage of oil (Fig.25).
6. Replace oil wick holder as instructed in items 3 and 4 under "TO INSTALL NEW OIL WICK HOLDER", pages
17 and 18. Replace arm plug screw J3.
7. Turn the set screw W2 inward lightly against the flat on the stud Y2. DO NOTTIGHTENscrewW2until final
adjustment is made in Step 17.
8. Turn machine pulley as required to make set screw T2 in needle bar crank accessible through hole at S2, Fig. 22
in rear of machine head.
9. Insert a screwdriver through this hole and, while turning stud E3 by hand to find its flat, turn set screw T2 until
it bears tightly upon the flat.
10. Turn screw T2 back, just enough to "break it loose".
11. Test for side play by pushing take-up lever A3 gently right and left; there should be .025 to .05mm side shake
between lever and wearing plate.
12. Movethread take-up crank inward or outward in needle bar crank, as required, to obtain clearance.
13. Using wrench 545945, through same hole and turning machine pulley as required, tighten hexagon head screw
U2 lightly.
14. Loosen set screw T2.
15. Securely tighten clamping screw U2.
15
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16. Securely tighten set screw T2.
17. Push hinge studY2 fully into machine casting and securely tightenset screw W2.
18. Turn machine pulley slowly, by hand,at least one complete revolution; testing take-up for binding, end shake
and noise. If binding occurs, recheck clearance between take-up and wearing plateC3 and between hinge stud
Y2 and machine casting.
19. Replace presser bar pressure regulating thumb screw R2, Fig. 20, page 13.
20. Replace and adjust upper needle bar bushing (drop feed), needle bar frame (compound feed) and needle bar
wi^ their accessories, as instructed on pages 2 and 13.
21. Replace and securely tighten arm hole plug S2.
22. Replace the face plate as instructed on page2.
TO REMOVE AND REPLACE ARM SIDE SHIELD WICK, NEEDLE BAR WICK
AND NEEDLE BAR CONNECTING STUD WICK (See Fig. 23)
(On Drop Feed Machines)
Arm side shield wick may be removed, after removing
the face plate and the screw F3. Lift arm side shieldG3 up
and out of machine.
When replacing arm side shield wick, make sure that
lower end of wick drops into oil pool beneath needle bar
crank and that the two upper wick loops are located as
close as possible to the needle bearing at B3, Fig. 24, with
out touching them. Then securely tighten screw F3.
To remove needle bar wick and connecting stud wick,
move take-up lever A3, so that it does not interfere with
removal of oil guard P2. Then remove face plate and screw
M2; lift take-up oil guard P2, with the top wicks, up and
out of machine.
Whenreplacingthe oil guard P2, which carries the needle
bar wick and connecting stud wick, make sure that lower
end of the stud wick drops into oil pool behind lower
needle bar bushing and
that the loop of needle bar wick is
placed behind the needle bar, as shown in Fig. 23.
-16-
SIDE
SHIELD
WICK
Fig. 23
B
NEEDLE
BAR
WICK
STUD
WICK
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TO REMOVE OIL WICK HOLDER (See Fig. 24)
Oil wick holder includes two oil wick leaders (see
Fig.25) and an oil wickfor the needle bar link and for
the two sets of needle bearings in the thread take-up as
shown in Fig. 24. It is removed in the following manner:
1. Remove face plate, needle bar and upper needle bar
bushing or needle bar frame, from the machine, as
instructed on pages 13 or 24.
2. Remove upper section of presser bar, as instructed on
page 14.
3. Remove holder screw H3.
4. Pulling gently, draw entire oil wickholder assembly
out of the head of the machine.
THIS
LOOP
SHOULD
TOUCH
THESE
LOOPS
SHOULD
JUST
CLEAR
Fig. 24
TO INSTALL NEW OIL WICK HOLDER
i~r-T
CORRECT INSTALLATION
Fig. 25
WICK
PINCHED
7
INCORRECT INSTALLATION
Fig. 26
WICK NOT REACHING
OIL
TTl
INCORRECT INSTALLATION
Fig. 27
1. Remove old oil wick holder as instructed above.
2. Remove top arm plugscrewJ3, Fig.25.
3. Insert two oil wick leaders into oil tube K3, as shown in Fig. 25sothat wick is slack over edge ofoil tube K3 at
point L3, Fig. 25. This will insure free passage of oil. Use tweezers through the screw hole at J3 to loop the wick
and bring it into positive contact with the arm shaft approximately at point M3 shovm in Fig. 25.
NOTE: DO NOT FORCE the wick leaders down too tightly against the edge L3 of oil tube, as shown in Fig. 26,
as this will decrease the flow ofoil from the arm shaft to the needle bar link and take-up bearings.
CAUTION: If the bottom of either oil wick leader is caught on the ledge as shown at N3, Fig. 27, no oil can be
taken up by the wick to be carried to the needle bar link and thread take-up bearing, where it is needed. Make sure
that the oil wick leaders are pushed all the way down into the smaller hole, without jamming, untU they touch the
arm shaft, as shown in Fig. 25.
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4. When oHwick leaders are correctly installed, replace holder screw H3, Fig. 25.
5. Adjust the three oil wick loops in holder (see Figs. 24 and 25), so that two of the loops come as close as possible
to, without touching, the two sets of needle bearings B3 while the third wick loop makes positive contact with
the thread take-up, as shown in Fig. 24.
6. Securely tighten holder screw H3.
7. Replace arm plug screw
J3.
8. Replace upper section of presser bar, upper needle bar bushing or needle bar frame and needle bar, as instructed
on pages 13,14 and 24.
9. Replace face plate, as instructed on page 2.
THE ARM SHAFT
Fig. 28
REMOVAL(See Figs. 28 to 30)
1. Remove the face plate.
2. Remove the arm sideshieldand wickand the thread take-up oil guard,asinstructed on pages 16 and 17.
3. Remove the needlebar, upper needlebar bushing or needle bar frame, presser foot and presser bar,asinstructed
on pages 13,14 and 24.
4. Removeentire thread take-up leverassembly,as instructed on pages14 and 15.
5. Loosen the four screwsin the arm top cover and remove the arm top cover.
6. Remove the feed timing screw M, Fig. 28 and loosen the set screw N, Fig. 28, in the feed and feed lifting
eccentric.
7. Loosen the two set screws P3 in the bevel gear and the two set screws Q3 in the thrust collar.
8. Loosenthe two set screwsS3, Fig.28 and removethe machinepulley.
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