Singer 9876 User manual

358426002 MAR/05
Service Manual
Household Sewing
Machine
THE SINGER COMPANY
2005 SINGER DO BRASIL
ALL RIGHTS RESERVED
Registered Trademark “THE SINGER COMPANY LTD.”Registered Trademark “THE SINGER COMPANY LTD.” Impresso no BrasilImpresso no Brasil
9876/9868/9860/
9858/
9855/9852/9850
9876/9868/9860/
9858/
9855/9852/9850

01
Approval
and date
9800 - Revisions Records
Description
Service Manual
Revision
MAR/05
Rev. no.
P/N 358426002

02
This manual is designed for use by trained and qualified service
persons.
The SINGER COMPANY will not be responsible for any parts
requiring replacement due to natural wear or to the abuse or
negligence of its use or in the event the machine is serviced by
other than a trained and qualified service person or even if
replaced parts do not meet applicable specifications.
Service Manual
MAR/05
Rev. no.
P/N 358426002

03
Scope
This service manual describes all of the servicing procedures,including all adjustments and parts
removal and replacement for the 9800 class machine. Additional information covering any
production changes, improvements or changes to parts will be made by issuing Singer service/parts
bulletins.
Machine Description
Tubular bed.
Lightweight casting.
Apollo sewing system.
Electronic triac foot speed controller.
New "FT" fabric feed system.
Vertical needle profile.
Motor concealed in bed.
Horizontal spool pin.
Automatic bobbin winder declutching.
Bobbin capacity of 41 m (45 yds) minimum.
Universal presser bar pressure control.
Maximum stitch lenght 5 mm (5 s.p.i.).
Self-threading take-up lever.
Push button instant reverse.
One-way needle insertion.
Direct pattern selection.
Drop feed system (optional).
Four step buttonholer (except 9850 & 9858) .
Automatic needle threading (optional).
Bed length 378 mm. (14.89 inches) without cloth plate.
Bed width 185 mm. (7.28 inches).
Bed height 75 mm. (2.95 inches).
Clearance under free arm 25,4 mm. (1.0 inch).
Free arm circunference 264 mm. (10.39 inches).
Overall height 290 mm. (11.42 inches).
Weight 8,3 kg. (18,1 lbs).
Tool requirements
1/8" screwdriver
3/16" screwdriver
1/4" screwdriver
Philips screwdriver
8 mm. open end wrench
10 mm. open end wrench
Pliers
Wire-cutter pliers
Feeler gauge GM8092
Feeler gauge set
“Duratec" Casting
With the introduction of "Duratec", selfthreading screws have been used to mount many of the parts
and assemblies to the structure. If is important that when replacing these screws, they be threaded
into the original screw threads. The proper procedure for doing this is to insert the screw into the hole
and turn the screw counterclockwise until the screw can be felt to "drop" in place. An audible "click"
may also be heard. Once the screw is properly in place, it may then be tightened.
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Extralong screwdriver (5,0 mm dia. x 380 mm long)
Service Manual
General Information
P/N 358426002
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Rev. no.

Service Manual
04
Table of contents
Section 1
lParts removals and replacements..........................................................
lFace plate.....................................................................................
lLight bulb replacement.....................................................................
lArm top cover ...............................................................................
lBottom bed cover and right side cover....................................................
lNeedle bar....................................................................................
lHead end assembly..........................................................................
lNeedle threader assembly.................................................................
lTake-up lever assembly and needle bar connecting link.............................
lHand wheel...................................................................................
lCamstack......................................................................................
lArm shaft and horizontal bevel gear.....................................................
lTension assembly.............................................................................
lNeedle bar driving arm and needle bar driving arm tension spring...................
lCam controlled feed mechanism.........................................................
lMotor and motor belt.......................................................................
lHook...........................................................................................
lFeed lifting lever assembly................................................................
lFeed rock shaft assembly..................................................................
lFeed forked connection....................................................................
lVertical shaft bevel gear...................................................................
lVertical shaft.................................................................................
lPattern selector mechanism...............................................................
lNeedle position selector lever..............................................................
lButtonhole control assembly ..............................................................
lStitch lenght assembly .....................................................................
06
07-08
07-08
09-10
11-12
13-14
15-16
17-18
19-20
21-22
23-24
25-26
27-28
29-30
31-32
33-34
35-36
37-40
41-42
43-44
45-46
47-48
49-50
51-52
53-54
55-56
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lSequential order of adjustment procedures....................................................
lVertical shaft end play.............................................................................
lBevel gear mesh and arm shaft end play.........................................................
lDisc and disc follower end play...................................................................
lCamstack radial play...............................................................................
lTake-up lever and needle bar connecting link lost motion....................................
lNeedle bar bearings................................................................................
lNeedle bar height..................................................................................
lNeedle bar pendulum timing ....................................................................
lZig-zag centralizing procedure...................................................................
lCentralizing left-center-right needle position.................................................
lNeedle location in the needle place slot.........................................................
lNeedle to hook relationship.......................................................................
lZig-zag lever bight stop in the straight stitch position.........................................
lMaximum width zig-zag lever bight stop.........................................................
lNeedle bar safety bight stop.....................................................................
lAlignment of knobs with panel graphics.........................................................
lPresser bar height and alignment.................................................................
lHook drive belt tension ...........................................................................
lHook timing (hook and needle synchronism)....................................................
lBobbin case position finger........................................................................
lBobbin case position plate........................................................................
lBobbin case clearance.............................................................................
lNeedle Thread tension.............................................................................
lBobbin winder.......................................................................................
lFeed rock shaft end play...........................................................................
lFeed dog centralization...........................................................................
lFeed dog height....................................................................................
lFeed dog throw.....................................................................................
lStitch lenght regulator spring tension...........................................................
lMotor belt tension..................................................................................
lLubrication..........................................................................................
lFlexi stitch zeroing................................................................................
lZero feed............................................................................................
lButtonhole cutting space..........................................................................
lNeedle threader....................................................................................
Section 2
58
59-60
61-62
61-62
63-64
65-66
67-68
69-70
71-72
73-74
75-76
77-78
79-80
81-82
83-84
85-86
87-88
89-90
91-92
93-94
93-94
95-96
97-98
99-100
101-102
103-104
103-104
105-106
107-108
109-110
111-112
113-118
119-122
123-124
125-126
127-128
Service Manual
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06
Service Manual
Section 1
Parts Removal and
Replacement
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B
A
C
Service Manual
Light Bulb Replacement
Face Plate Cover
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Service Manual
Removal:
1. Raise presser foot.
2. Remove face plate cover screw (A).
3. Remove face plate cover (B) by pulling it down and laterally.
Replacement:
1. Replacement of the face plate cover is the same as described above, but in a reverse
order. Be sure the presser foot is in the raised position.
Removal:
Turn the machine off and remove plug from outlet.
1. Remove face plate cover.
2. Push lamp (C) up and turn it clockwise.
3. The spring inside the socket, will push the lamp down and out the socket.
Replacement:
1. After inserting the lamp pins into the socket slots, push the bulb lamp (C) up and then
turn it gently counterclockwise.
Face Plate Cover
Light Bulb Replacement
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09
Service Manual
Arm Top Cover
C
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B
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10
Service Manual
Removal:
1. Position Stitch width button to the left (straight stitch position) and the Needle
position button in the center.
2. Be sure that the bobbin winder is in the “OFF” position (to the left).
3. Remove arm top cover srews (A) and (B).
4. Remove the arm top cover (C) pulling it frontwards and up. Check if buttons slits are
released from the studs.
Replacement:
1. Replacement is the same as removal in reverse order.
Check that the spindle turns freely . Push it to the left again (sew position) and check if
the machine runs normally.
If the bobbin winder hesitates or fails to rotate, remove covers and check for worn or
absent bobbin winder rubber ring .
NOTE:
Push bobbin winder spindle to the right (bobbin winding position) and run machine.
Arm Top Cover
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11
Bed bottom cover
Service Manual
Right Side Cover
P/N 358426002
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D
E
B
F
C
G
A
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Service Manual
Removal:
1. Remove the bed bottom rubber feet (C).
1. Remove the screws (D) and the screw (E).
2. Remove hex nut (F).
3. Remove bed bottom cover (G).
Replacement:
1. Replacement of this bed bottom cover is the same as described above, but in a
reverse order.
Bed Bottom Cover
Removal:
1 - Remove arm top cover.
2 - Remove screw (A).
3 - Hold the bottom side of cover (B) and pull it out and up from machine.
Replacement:
1 - Replacement of this cover is the same as described above, but in a reverse order.
Right Side Cover
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Service Manual
Needle Bar
A
B
C
D
E
F
E
F
For machines without
Automatic Needle Threader
For machines with
Automatic Needle Threader
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Service Manual
Removal:
1. Remove face plate cover and arm top cover.
2. Remove needle by loosing the screw (B) with thread guide, the screw (A) and needle bar
gib (C).
3. Loosen needle threader bight stop screw (D) (For models with Needle threader) and
needle bar clamping screw (E).
4. Draw needle bar (F) up and out of the machine.
Replacement:
1. Replacement is the same as removal in reverse order.
2. Then, adjust needle bar height (see pages 67-68).
Needle Bar
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Head end assembly
Service Manual
A
F F
BB
CC
DD
EE
For machines without
Automatic Needle Threader
For machines with
Automatic Needle Threader
P/N 358426002
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G
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Head end assembly
Service Manual
Removal:
1- Remove the face plate cover and arm top cover.
2- Remove the lamp socket.
3- Loosen screw (A).
4- Raise presser bar.
5- Loosen presser foot screw (B) and remove shank (G) and presser foot (C) .
6- Remove three screws and washers (D), (E) and (F) .
7- Remove head end assembly.
Replacement:
1- Replacement is the same as removal in reverse order.
2- Adjust needle location in the needle plate slot and needle to hook relationship. (See
pages 75-76)
3- Check hook timing (See pages 91-92) and needle bar height (See pages 67-69) and adjust
if necessary.
4- Adjust presser bar alignment and height. (See pages 87-88)
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A
D
E
C
C
B
Service Manual
Needle Threader Assembly
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Service Manual
Removal:
1.
1. Remove face plate cover and arm top cover.
2. Force the needle threader down to remove it.
4. Force pins (A) and (B) back to get them removed.
5. Remove rubber ring (C), spring (D) and the needle threader actuating support (E) .
Replacement:
Replace these parts the same way as described above, but in a reverse order.
Needle Threader Assembly
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A
B
C
D
E
Service Manual
Take-up Lever Assembly and
Needle Bar Connecting Link
P/N 358426002
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Rev. no.