Singer 6160 User manual

Service Manual
6160
6180
104 73 11-26
26 Oct 2010

Service Manual
Page
2/27
MODEL 6180 / 6160
Contents
SEC.01 Disassembling of outer covers
*SEC.02 Positions described in this manual
SEC.03 Needle height
SEC.04 Timing of needle and shuttle hook
SEC.05 Needle clearance
SEC.06 Adjustment of shuttle race position
SEC.07 Needle side motion (Left-right position)
SEC.08 Timing of needle and feed dog
SEC.09 Feed dog position
SEC.10 Feed dog height
SEC.11 Needle threader height
SEC.12 Presser foot height
SEC.13 Adjustment of thread tension
SEC.14 Origin point positioning of motor
SEC.15 Circuit board
SEC.16 Wiring diagram

Service Manual
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SEC.01 Disassembling of outer covers
Remove screw at the face cover shown in the picture below.
Remove screws at the rear cover shown in the picture below.
Remove screws at the bottom shown in the picture below.
Remove face cover.
Remove front cover and rear cover

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Remove spring plate at the shuttle race cover.
Then remove shuttle race cover.
Remove thread guide pin.
Previous shape (left), Current shape (right)

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Remove front cover by screwdriver as shown on picture below.
Machine with front cover removed
Then remove rear cover

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*SEC.02 Positions described in this manual
SEC.02,
SEC.06
SEC.10
SEC.10
SEC.09
SEC.07-2
SEC.04
SEC.10
SEC.02
SEC.06
SEC.05
SEC.10
SEC.13

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SEC.03
SEC.08
SEC.04
SEC.12
SEC.13

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SEC. 03 Needle height
Procedure of how to check and adjust needle height is described in this
section.
(Checking)
Distance between needle plate and tip of needle should be 14.5 mm ± 0.2 mm,
when needle is at its highest position under specification of design. If it is
unable to measure needle height, follow the simple method below.
Set needle to its lowest position, while it is set at center position. Check to see if
the needle tip is located about 0.5 to1.0 mm deeper than shuttle hook point as
shown below.
(Adjustment)
Set needle bar to its lowest position and loosen screw at needle bar clamp
through adjustment hole at needle bar support. Slide needle bar to adjust
needle height. Tighten the screw after adjustment.

Service Manual
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SEC.04 Timing of needle and shuttle hook
Procedure of how to check and adjust timing of needle and shuttle hook is
described in this section. Check needle height beforehand.
(Checking)
Select zigzag stitch and set stitch width at maximum.
Turning hand wheel slowly, bring up needle from its right hand and lowest point,
until shuttle hook point comes to align with left side of needle. Check to see if
hook point is 0.5mm to 1.0mm above the upper edge of needle eye as shown
below. (This is simple checking method without gauge.)
(Adjustment)
Loosen screw A at the lower shaft rocker as shown above and turn hand wheel
in either direction to adjust timing of shuttle hook and needle while holding
shuttle hook as shown above.
0.5-1.0mm
A

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SEC.05 Needle clearance
Procedure of how to check and adjust needle clearance is described in this
section.
(Checking)
Check to see if the clearance between needle and shuttle hook point is 0 to
0.15 mm when needle and shuttle hook point are overlapped. Check the
clearance by pushing needle tip by small screw driver.
(Adjustment)
Loosen screw Afixing shaft linked with support bracket
Slide needle bar support in either direction as shown above.
1. To decrease the clearance;
Slide needle bar support toward direction of arrow 1 as shown above.
2. To increase the clearance (if needle hits the shuttle hook);
Slide needle bar support toward direction of arrow 2 as shown above.
A
1
2

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SEC. 06 Adjustment of shuttle race position
Procedure of how to check and adjust shuttle race position is described in this
section.
(Adjustment)
Loosen screw (1) from the bottom of machine and screw (2) from the left.
Loosen screws (4) and (5) on the shuttle shaft gear (3).
After shuttle race position is adjusted, engagement of shuttle shaft gear (3) and
lower shaft gear (6) must be securely adjusted.
1 2
4
5
3
6

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SEC. 07 Needle side motion (Left-right position)
Procedure of how to check and adjust needle position to the needle hole with
maximum zigzag width is described in this section.
(Checking)
Select zigzag stitch at maximum width.
Set needle at extreme left and right ends to check whether needle evenly Sets
to the needle plate.
(Adjustment)
Rotate needle position adjustment screw (1) at the needle bar support in either
direction, until needle evenly Sets to the needle plate.
1

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SEC.08 Timing of needle and feed dog
Procedure of how to check and adjust timing of needle and feed dog is
described in this section.
1. Horizontal feed
(Checking)
Select straight stitch and set stitch length at maximum.
Turn hand wheel to set needle at its highest position. Check to see whether
forwarding feed dog and lowering needle start at the same timing.
(Adjustment)
This timing cannot be adjusted in this machine, because eccentric cam for
lower shaft gear and horizontal feed cam are integrated and it is fixed at the
main shaft at specific position.

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2. Vertical feed
(Checking)
Select straight stitch and set stitch length at “0”.
Lowering need bar from its highest point, check to see whether top surface of
feed dog is on a same level of the surface of needle plate, when needle bar
approaches to 4-5mm above needle plate.
(Adjustment)
Loosen fixing screw (2) on vertical feed cam (1) under the arm bed as shown
below. Turn hand wheel in either direction to adjust feed timing while inserting
2.5mm hexagonal driver into the screw.
After adjustment, tighten the screw (2) securely.
4-5 mm
1
2

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SEC. 09 Feed dog position
(Checking)
Select straight stitch and set stitch length at maximum. Turn hand wheel
toward you to see whether feed dog is not hitting against needle plate at
beginning and end of forward feeding of feed dog. (Clearance between needle
plate and feed dog at front and rear ends must be the same.)
Check to see whether center feed is not hitting against needle plate as well
Beginning of forward feeding End of forward feeding
(Adjustment)
Set feed dog at end of forward feeding by turning handwheel .
Loosen screw (2) on feed locker arm (1) at this position.
Then adjust feed dog position with shaft (3) correctly while holding arm(1).
1
2
3

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SEC. 10 Feed dog height
Procedure of how to check and adjust feed dog height to needle plate is
described in this section.
(Checking)
Move feed dog to its highest position by turning hand wheel.
Check to see if feed dog height is 0.9 mm to 1 mm as shown below at the
position where needle is lowered.
(Adjustment）
Open bobbin access cover and insert a minus screw driver to the ditch at the
vertical feed block as shown below and turn in either direction to adjust feed
dog height.

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SEC. 11 Needle threader height
Procedure of how to check and adjust needle threader height is described in
this section.
1. Horizontal direction
(Checking)
Check if the needle is attached properly.
Raise needle to its highest position by rotating hand wheel toward you.
And then check and see if the hook is inserted into the needle hole securely.
(Adjustment)
Use pliers to catch needle threader bar and lower it to push out the needle hook.
Then correct hook of needle threader by bending it in either direction with small
screw driver. After adjustment re-attach needle hook securely and operate it to
check whether adjustment is correctly taken.
2. Vertical direction
(Checking)
Raise needle to its highest position and check to see whether hook of needle
threader is inserted at upper part of needle hole.
Hook of needle threader
Length from needle clamp to upper
part of the hole of needle is same in
#11 and #14, but the size of hole will
be different.
Upper part of the hole must be used
for standard of this adjustment.

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(Adjustment)
Set needle bar at its highest position and loosen screw (1) of needle threader
stopper at needle bar crank inside the bracket as shown below with 2mm
hexagonal screw driver.
Lift up the stopper with a tool as shown above while lowering needle threading
lever. At this position, a pin of guide bar is hitting against the shelf of stopper.
Under the above situation, adjust hook of needle threader is inserted correctly
into the upper part of hole of needle.
After adjustment, tighten the screw of stopper temporarily.
Operate needle threader and check whether hook of needle threader is
inserted correctly and tighten the screw at stopper securely.
Screw (1)
It is behind the bracket.

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SEC.12 Presser foot height
(Checking)
Check if presser foot is parallel to feed dog and holes of needle plate properly.
Check and see if the clearance between needle plate and presser foot is about
5.5 mm.
(Adjustment)
Remove face cover and lift up presser foot. Loosen screw (2) at presser bar
bracket (1), then press presser bar down and tighten screw (2) securely while
presser foot lever is being standstill.
Check to see presser foot is aligned with holes of needle plate after adjustment.
2
1

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SEC.13 Adjustment of thread tension
(Checking)
Set thread tension dial at “5”, and pull thread between tension discs and check.
Thread tension value with non-elastic cotton thread #60.
Measured value should be 50 – 60 g.
(Adjustment) when front cover is not removed:
Remove front cover.
Remove screw (2) and the dial (1) with thread tension set at “5”.
Re-fit the dial (1) and turn it in either direction until desired thread tension at “5”
is obtained while measuring thread tension.
1
2
1