Singer 9876 - Tension Assembly Removal and Replacement

26
Service Manual
Removal:
1- Remove the face plate cover, arm top cover, hand wheel and shaft driver assembly, head
end assembly, take-up lever assembly and camstack assembly.
2- Loosen the arm shaft collar set screw (F) so that the collar can move along the arm
shaft.
3- Remove set screw (B) in bevel gear (A) releasing it from the horizontal arm shaft.
4- Draw the crank (H) with arm shaft (C) to the left until it clears bevel gear (A).
5- Remove bevel gear (A).
6- Continue to draw arm shaft (C ) out of the machine until it clears collar (E) and washer
(D).
7- Remove collar (E).
8- Remove arm shaft (C). The washer (G) will remain on the arm shaft.
Replacement:
1- Replacement is the same as removal in reverse order. (Refer to "bevel gear mesh and
arm shaft end play" on page 56-57)
2- In order to maintain feed timing align the timing mark on the vertical shaft bevel gear
between the two timing marks on the horizontal bevel gear. (Refer to "bevel gear mesh
and arm shaft end play" on page 58-59)
3- Adjust bevel gear mesh and arm shaft end play (See pages 59-60), camstack radial play
(See pages 60-61), and make corrections you believe it's necessary to firmly place the
take-up lever assembly and needle bar connecting link. (See pages63-64)
4- Check and adjust if necessary:
l Needle bar height (pages 67-68)
l Left-center-right needle position (pages 73-74)
l Zig-zag bight stops positioning (pages 79-80)
l Needle bar height (pages 87-88)
l Hook timing (pages 90-91)
Arm shaft and horizontal bevel gear
P/N 358426002
MAR/05
Rev. no.