JUKI HZL-K85 Service Manual
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JUKI HZL-K85 Service Manual

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See also: Instruction Manual
Date:
2011/09/23
SERVICE MANUAL
Page:
1/39
Model:
K65&K85
Original issued: Sept.2011

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Summary of Contents for JUKI HZL-K85

  • Page 1 Date: 2011/09/23 SERVICE MANUAL Page: 1/39 Model: K65&K85 Original issued: Sept.2011...

  • Page 2: Table Of Contents

    Date: 2011/09/23 SERVICE MANUAL Page: 2/39 Model: CONTENTS K65&K85 SEC. 01-----Disassembling outer covers SEC. 02-----Test mode SEC. 03-----Adjustment of feed-dog height SEC. 04-----Needle bar height SEC. 05-----Needle threader height SEC. 06-----Presser foot height SEC. 07-----Needle position SEC. 08-----Clearance between needle and shuttle hook SEC.

  • Page 3: Sec. 01

    Date: 2011/09/23 SERVICE MANUAL Page: 3/39 Model: SEC. 01 Disassembling outer covers K65&K85 1. Lay the machine on its back. 2. Remove screw for rubber feet. 3. Remove rubber foot for adjustment by hand.
  • Page 4 Date: 2011/09/23 SERVICE MANUAL Page: 4/39 Model: K65&K85 4. Remove base cover. 5. Remove screw for bottom cover. 6. Remove the bottom cover.
  • Page 5 Date: 2011/09/23 SERVICE MANUAL Page: 5/39 Model: K65&K85 7. Lift the machine and remove screws on needle plate. 8. Remove needle plate. 9. Remove screw for face cover.
  • Page 6 Date: 2011/09/23 SERVICE MANUAL Page: 6/39 Model: K65&K85 10. Remove screw on rear cover. 11. Remover screw on rear cover which is located near face cover. Remover cover fixing screw near face cover.
  • Page 7 Date: 2011/09/23 SERVICE MANUAL Page: 7/39 Model: K65&K85 13. Lift the rear cover using screw driver and remove projection of the cover from machine body. Remover the rear cover. Remover screw from top cover.
  • Page 8 Date: 2011/09/23 SERVICE MANUAL Page: 8/39 Model: K65&K85 16. Remove fixing screw inside the top cover. Photo is left side (Lamp cover side) view. 17. Position of the above screw is shown below with the top cover removed. Foot of top cover 18.
  • Page 9 Date: 2011/09/23 SERVICE MANUAL Page: 9/39 Model: K65&K85 Lift the top cover at the side of face cover. Remove the top cover by lifting it at the same time.
  • Page 10 Date: 2011/09/23 SERVICE MANUAL Page: 10/39 Model: K65&K85 19. Loosen screw of front cover at the side of hand wheel so that it may make it easier to re-assemble it. 20. Loosen screw of fixing foot of front cover at the side of hand wheel.
  • Page 11 Date: 2011/09/23 SERVICE MANUAL Page: 11/39 Model: K65&K85 Remove screw of front cover at the side of hand wheel. Remove tapping screw at needle bar as shown.
  • Page 12 Date: 2011/09/23 SERVICE MANUAL Page: 12/39 Model: K65&K85 Remove flat cable connected with circuit board from AC circuit board. 24. Remove the front cover from machine body.

  • Page 13: Sec. 02

    Date: 2011/09/23 SERVICE MANUAL Page: 13/39 Model: SEC. 02 Test mode K65&K85 Move bobbin-winder shaft to operating position. Press and hold the “Reverse button”. Turn on sewing machine.
  • Page 14 Date: 2011/09/23 SERVICE MANUAL Page: 14/39 Model: K65&K85 Model K65 Release bobbin-winder shaft by the time when LED of pattern select button is lit at lowest line. Model K85 Release bobbin-winder shaft by the time when LED display is lit at “00” as illustrate below.
  • Page 15 Date: 2011/09/23 SERVICE MANUAL Page: 15/39 Model: K65&K85 K65⇒ K85⇒「00」 Test mode 1 Function: Zero feed, three needle positions (L/C/R) K65⇒ K85⇒「01」 Test mode 2 Function: Zero feed, center needle position K65⇒ K85⇒「02」 Test mode 3 Function: 2mm feed, center position, 11stitches forward and back ward. K65⇒...
  • Page 16 Date: 2011/09/23 SERVICE MANUAL Page: 16/39 Model: K65&K85 K65⇒ K85⇒「05」 Test mode 6 Function: origin point positioning of zigzag bight and stitch length. Zigzag width manual adjustment button LED lit when select #6 button first. For origin point positioning of stitch length, push stitch length manual adjustment button Model K65 Model K85...

  • Page 17: Sec. 03

    Date: 2011/09/23 SERVICE MANUAL Page: 17/39 Model: Adjustment of feed-dog height K65&K85 SEC. 03 Checking: 1. Set stitch length at zero feed. 2. Move feed dog to its highest position by turning hand wheel. Check to see if feed dog height is as illustrated below. 0.9 –...
  • Page 18 Date: 2011/09/23 SERVICE MANUAL Page: 18/39 Model: K65&K85 Turn screw (a) to get gap between end (b) of screw (a) and vertical movement control cam 1 (c). Open front cover and back cover as shown below for adjustment of screw (d). Adjust the height of feed-dog by turning screw (d) at side of vertical movement control cam2 (e) until the height of feed-dog obtains correct position.

  • Page 19: Sec. 04

    Date: 2011/09/23 SERVICE MANUAL Page: 19/39 Model: Needle bar height K65&K85 SEC. 04 Note: Make this checking before checking “Needle timing to shuttle” and ”Feed-dog timing (vertical motion)”. Use needle #90/14. Checking: 1. Select straight stitch at center needle position. 2.
  • Page 20 Date: 2011/09/23 SERVICE MANUAL Page: 20/39 Model: K65&K85 3. Tighten the screw (a) securely after adjustment. Replace needle gauge with normal needle #90/14. 4. Check to see if needle threader operates correctly and there is not interference in vertical movement of needle bar.

  • Page 21: Sec. 05

    Date: 2011/09/23 SERVICE MANUAL Page: 21/39 Model: Needle threader height K65&K85 SEC. 05 Cheking 1. Use needle Singer 90/14. 2. Select straight stitch at center needle position. 3. Raise needle to its highest position by turning hand wheel toward you. 4.
  • Page 22 Date: 2011/09/23 SERVICE MANUAL Page: 22/39 Model: K65&K85 7. If the direction of insert hook is deviated from correct position, adjust the hook position with the small screw driver in the accessory. Correct...

  • Page 23: Sec. 06

    Date: 2011/09/23 SERVICE MANUAL Page: 23/39 Model: Presser foot height K65&K85 SEC. 06 Checking 6 mm 1. Lower the feed dog below the needle plate. 2. Raise the presser foot lever. 3. Check and see if clearance between needle plate and presser foot is about 5.6 mm.
  • Page 24 Date: 2011/09/23 SERVICE MANUAL Page: 24/39 Model: Needle position K65&K85 SCE. 07 Checking: 1. Set test mode at 2. 2. Turn hand wheel by hand and see if the position of needle is at center of needle hole on needle plate. Adjustment: 1.

  • Page 25: Sec.08

    Date: 2011/09/23 SERVICE MANUAL Page: 25/39 Model: Clearance between needle and shuttle K65&K85 SEC.08 Note: Set machine at test mode and select test mode 1 for needle at L/C/R positions. Make this checking before checking “Needle timing to shuttle”. Checking: 1.
  • Page 26 Date: 2011/09/23 SERVICE MANUAL Page: 26/39 Model: K65&K85 2. If needle clearance to shuttle at right and left position is not same, adjust position of fulcrum (b) for needle swing support. Loosen two screws (c) located under bottom of support plate and adjust position of fulcrum (b).

  • Page 27: Sec. 09

    Date: 2011/09/23 SERVICE MANUAL Page: 27/39 Model: Needle timing to feed-dog K65&K85 SEC. 09 Note: After adjustment, be sure to follow “Needle timing to shuttle”. As horizontal and vertical feed motion is unitized on this model, adjustment of feed timing is as follows: Checking: 1.
  • Page 28 Date: 2011/09/23 SERVICE MANUAL Page: 28/39 Model: K65&K85 3. Holding such condition, turn belt gear at the side of lower shaft by hand, so that teeth of feed dog may be at the same level of needle plate. Holding this position, tighten one of screws of belt gear on the main shaft. 4.

  • Page 29: Sec. 10

    Date: 2011/09/23 SERVICE MANUAL Page: 29/39 Model: Needle timing to shuttle K65&K85 SEC. 10 Check “Feed timing (vertical movement)” and “Needle height” beforehand. Checking 1. Set machine at test mode and select mode 1. 2. Remove needle plate. Check to see if needle is not bent. 3.
  • Page 30 Date: 2011/09/23 SERVICE MANUAL Page: 30/39 Model: K65&K85 2. While needle is placed around the lower area, loosen a screw, but not the one (d) which can be touched for adjustment. Holding this position, adjust needle timing shuttle by turning hand wheel with a tool inserted into the screw hole as illustrated below.

  • Page 31: Sec. 11

    Date: 2011/09/23 SERVICE MANUAL Page: 31/39 Model: K65&K85 SEC. 11 Meshing condition of shuttle gear and lower gear 1. Check meshing condition of gears after adjustment. Check play of the gear at 4 positions –each 90 degree angle of 1 rotation of shuttle race.

  • Page 32: Sec. 12

    Date: 2011/09/23 SERVICE MANUAL Page: 32/39 Model: Adjustment of thread tension K65&K85 SEC. 12 Adjustment of needle thread tension is explained below. 1. Remove face and front covers. 2. Pull out outer dial (a) on needle thread tension mechanism. Remove star-shaped plate spring (c) on inner dial (b). 3.
  • Page 33 Date: 2011/09/23 SERVICE MANUAL Page: 33/39 Model: K65&K85 4. Insert the inner dial (b) into place after adjustment. Fix wall portion (h)of the inner dial into position where it is around opposite side of pipe knock pin (e). Though tension value may be deviated a little from the one adjusted on section 3,, Re-adjust it in last step.
  • Page 34 Date: 2011/09/23 SERVICE MANUAL Page: 34/39 Model: K65&K85 6. Make sure where indicator of the front cover is to be positioned on thread guide plate beforehand. Insert the outer dial (a) so that the center position may be aligned with indicator on front cover .

  • Page 35: Sec. 13

    Date: 2011/09/23 SERVICE MANUAL Page: 35/39 Model: K65&K85 Retaining bracket for bobbin case SEC. 13 1. Remove needle plate. 2. Loosen screw (a & b) and adjust the position of retaining bracket until the projection (c) of bobbin case can be positioned against the plate spring. 3.

  • Page 36: Sec. 14

    Date: 2011/09/23 SERVICE MANUAL Page: 36/39 Model: Origin point positioning of zigzag bight K65&K85 SEC. 14 This section is to explain how to restore meshing position of pinion gear and operation gear of step motor for zigzag bight. 1. Remove face and front covers. 2.
  • Page 37 Date: 2011/09/23 SERVICE MANUAL Page: 37/39 Model: Origin point positioning of stitch length K65&K85 SCE. 15 This section is to explain how to restore meshing position of pinion gear and operation gear of step motor for feed. 4. Remove face and front covers. 5.

  • Page 38: Sec. 16

    Date: 2011/09/23 SERVICE MANUAL Page: 38/39 Model: Electronic components area K65&K85 SEC. 16 List of main circuit boards for K series 120V 230V 120V 230V 87514 87519 87514 87519 Transformer 84130 CPU circuit board 84120 84125 84120 84125 Power supply circuit board 84123 84124 SW control circuit board...

  • Page 39: Sec. 17

    Date: 2011/09/23 SERVICE MANUAL Page: 39/39 Model: Wiring diagram K65&K85 SEC. 17...

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Hzl-k65

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