Reliable 4220SW User manual

INDUSTRIAL SEWING MACHINE INSTRUCTION MANUAL
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4220SW

1. Brief introduction
1.5. Main specifications
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
Installing the oil pot
Lubrication
Installing the needle
Loading the bobbin in the bobbin case
Removing and installing the bobbin case
Adjusting the bobbin winder attention assembly
Winding the bobbin thread
Threading
Adjusting the stitch length
Adjusting the thread tension nut
Adjusting the thread take-up spring
Presser foot lifter
Adjusting the pressure of the presser foot
Relationship between needle and rotating hook
Adjusting the height and presser foot walk
CONTENT
OPERATION INSTRUCTION
1. Arm and bed
2. Upper shaft and thread take-up mechanism
3. Needle bar vibrating parts
4. Upper feed parts
5. Feed mechanism.
6. Lower shaft mechanism
7. Thread tension and bobbin thread winder parts
8. Knee lifter mechanism
9. Lubrication....
10.Accessories
PARTS MANUAL

INSTRUCTION MANUAL

1. Brief introduction
This machine is suitable for sewing the heavy
materials of car seats, sofas, tarpaulins, tents, bags,
etc.
1.5. Main specifications
ApplicationMedium and heavy duty
Max. sewing
speed 1800 s.p.m max
Max. stitch 9mm
speed
Needle bar 36mm
stroke
DP*17 (Nm125-Nm180)
standard Nm160 (23#)
Needle
LubricationSemi-lubrication
HookLarge hook
Height of
presser foot lift 9mm by hand, 16mm by knee
MotorMotor

an oil pan
Less Many
2. Installing the oil pot (Fig. 2)
1.Install the bolt ①, oil seal ② and spacer ③
onto the oil reservoir, and then put the cushion ⑤
and spacer ⑧ into the set screw ④, then set it by
nut ⑥.
2.Tighten the oil pot ⑦ onto the bolt ①.
3. Lubrication (Fig. 3)
1.Lubricate behind face plate cover.
2.Machine body lubrication
a.Lubricate the place as the arrows indicate once a
week;
b.When running the machine for the first time or after
a long period of non-use, please oil the place as the
arrows indicate. Take down the top cover ②, then oil
each felt and oil wick. ①
3.Rotating hook lubrication
a.For hook lubrication add oil to oil hole ③ until oil
level is between L and H ⑤. Check once a week.
Always keep the oil level between L and H ⑤.
b.When adjusting the oil flow to the rotating hook,
turn the adjusting screw ⑥ clockwise to increase the
flow and counter clockwise ⑦ to decrease the flow.
Note: Excess lubrication results in leaking.
a.Loosen the face plate screw;
b.Open the face plate ① in the direction of the
arrow;
c.Lubricate the place as the arrow shows every
day;
d.Close the face plate;
e.Tighten the screw.

Long slot left
4. Installing the needle (Fig. 4)
1.Turn the balance wheel to raise the needle bar to
its highest position;
2.Loosen the set screw ② and make the long
groove of the needle ① face towards the left;
3.Insert the needle into the needle bar;
4.Tighten the set screw ②. To make sure needle is
all the way up check visibility on fig 3.
5.Loading the bobbin in the bobbin case (Fig. 5)
1.When loading the bobbin into the bobbin case, the
thread should be passing from left to right in the
bobbin.
2.Use your thumb and index finger to secure the
bobbin in the bobbin case from spinning. Bring the
thread through the slot ① in the bobbin case and
under the flat tension spring ②.
Needle threads from left to right

6.Removing and Installing the bobbin case (Fig. 6)
7.Adjusting the bobbin winder attention
assembly (Fig. 7)
1.By loosening the screws ② in fig 7, you can
move the tension assembly in and out to center
the thread in the bobbin when winding.
2.Insert the bobbin thread guider ③ into the
machine head.
8. Winding the bobbin thread (Fig. 8)
1.Thread in numerical order from ① to ④, then
wind the bobbin winder.
2.Press down the winding bar A.
3.Loosen the set screw B and adjust the adjusting
plate until the winding amount reaches to 80% of
the outside diameter.
4.After winding, the winding bar A will separate and
stop automatically.
1.When removing the bobbin case from the hook
①
assembly, lift the latch and pull the case straight out.
2. Align the bobbin case with the rotating hook shaft
then insert it. Align the inside of the rotating hook
②and the latch ③, then install the bobbin case by
pressing it until you hear a “click” sound.

StrongStrong
Strong Weak
WeakWeak
9. Threading (Fig. 9)
Thread in the order as shown in Fig. 9
10.Adjusting the stitch length (Fig. 10)
11.Adjusting the thread tension nut (Fig. 11)
1. Turning the dial ① towards a larger number
increases the stitch length and turning it towards a
lower number decreases the stitch length.
2. To make a reverse stitch, press the lever ② all
the way down.
1. Adjusting the thread tension nut of the needle:
Turn the nut ① clockwise to increase the tension
of the needle thread; to reduce the tension of the
needle thread turn it anti-clockwise.
2. Adjusting the tension of the bobbin thread:
Turn the large screw ② on the flat spring
clockwise to increase the tension and
counterclockwise to decrease the tension.

Strong
Weak
Small Large
12.Adjusting the thread take-up spring
(Fig. 12)
1.Changing the travel of the thread take-up spring:
a.Loosen the set screw ②, move the stopper ③
leftward and rightward, then adjust the thread
take-up spring ①.
b.Move the stopper ③ rightward to increase the
movement of the take-up spring and left to
decrease it.
2.Changing the tension of the thread take-up
spring:
Loosen the nut ④, turn the spring shaft ⑤
counter-clockwise to increase the tension; turn
it clockwise to reduce the tension.
13. Presser foot lifter (Fig.13)
1.Stopping the presser foot when it is lifted:
Lift the lifting bar ① in the direction of the arrow.
When the presser foot is lifted by 9mm, stop it.
2.When lowering the presser foot, put down the
lifting bar ① to make the presser foot go back to its
original place.
14.Adjusting the pressure of the presser
foot(Fig. 14)
Turn the adjusting screw ① rightward to increase
the pressure; turn it leftward to reduce the
pressure. After adjustment, tighten the set nut
②.
15. Relationship between needle and
rotating hook(Fig. 15)
1. Adjust the stitch length dial to 0.
2. Turn the balance wheel to lift the needle bar
from its lowest position by 2.1mm. loosen the
screw ①, adjust the distance between up end of
the eye of needle ② and rotating hook point ③
to 1mm, then tighten it.
3. Turn the balance wheel to lift the needle bar
from its lowest position by 2.1mm. Loosen the
two set screws ④, turn the rotating hook, align
the rotating hook point ③ with the center of the
needle ②, then tighten the two screws ④.
4. Loosen the two set screws ④, move the
rotating hook leftward and rightward. Align the
rotating hook point ③ and the center of the
needle ②, and adjust the clearance between
rotating hook point and needle to 0.02-0.05mm,
then tighten the screw.

16.Adjusting the height and pressure foot
walk (Fig. 16)
To adjust the height of the presser foot walk loosen nut
②, slide the lever up to increase the height of the walk
or slide the lever down to decrease the height of the
walk.
How to adjust when the inside foot and outside foot are
not rising at equal height:
a. By turning the handwheel towards you, bring the foot
that is lifting the highest all the way up.
b. By turning the handwheel towards you, bring the foot
that is lifting the highest, halfway down in its travel
towards the needle point. Then loosen screw ① the foot
will drop and make contact with the needle plank, now
tighthen screw ① to secure the walk.