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How to adjust belt tension? - Sewing Machines

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  • William Gilbert Apr 04, 2015

    Hi Patricia Sturdevant, I want to help you with your question, but I need more information from you. Can you please add details in the comment box?
    What make and Model?
    Do you have a Manual??

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  • Sewing Machines Master
  • 2,963 Answers

Probably just needs a new belt.

Posted on Apr 04, 2015

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Posted on Jan 02, 2017

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My vintage kenmore hand wheel was frozen now it turns manually but not when I use the foot pedal, then it won't turn


Either you will replace the belt or have to adjust the motor/belt tension.
1. The motor can be loosened by a couple of bolts. This allows the motor to be moved to adjust the tension of the belt.
2. The tension can be adjusted properly by turning the motor on with the foot pedal; low speed.
3. While the motor is running move the motor in a fashion that will loosen or tighten the belt. The correct location will allow the motor to run at it's highest speed.
4. Re-tighten the bolts and retest the machine.

May 04, 2017 | Kenmore Sewing Machines

1 Answer

How to install belts on sewing machine 15814300 where do they go


You don't enough information. As a general rule remove the covers at the front of the machine, to get at the belt. loosen the motor belt adjustment screw and mounting bolts , remove the belt and refit the new one , Adjust the belt tension to specs. retighten and refit covers

Mar 12, 2015 | Sewing Machines

1 Answer

Change drive belt


Setting the belt tension on the 707-708-717 machines with the old rubber "Continental" belts:
1. Make sure that the hand-wheel spins freely on the main-shaft bushing stub when the release knob is loosened.
2. Assuming that you are using the original 441mm "Continental" rubber v-belts, the setting is made by means of loosening a 5mm Allen socket cap screw at the base of the step pulley support.
_____________
NOTE: The hand-wheel, stepped pulley, and motor pulley v-grooves must be clean. This is to say, that they cannot have any particulate or threads wrapped around the grooves.
4. The pulley will be automatically pre-tensioned to a 7 o'clock position by means of a spring to maintain the stepped pulley position. By pulling the belt toward this 7 o'clock position, the pulley tension can be adjusted and then tightened by means of the fixing screw.
_____________
5. It is important to know that both the upper and lower belt tensions can be independently adjusted so as to allow the hand-wheel to spin freely for bobbin winding without having the hand-wheel drive the machine. This is done by adjusting the step pulley support + or - radially, near the 7 o'clock position.
If the hand-wheel drives the machine with the upper belt loosened, then either the belt is too tight or the hand-wheel bushing and main-shaft stub need cleaning and lubrication.
Note: Lubrication was once the standard factory procedure with a class 68 oil, but experience dictates a dry lubrication with graphite. Silicone lubes are not recommended.
6. Do not over-tighten the 5mm Allen fixing screw as the 5mm threaded frame boss can be broken off.
================
Adjusting with the original Polyurethane v-belts on models 807-801-810-817-811 machines:
1. Follow the same procedure as mentioned but allow the step pulley's positioning spring provide the belt tension. Nothing more is required here.
NOTE: Sometimes these belts and pulleys get oily thus allowing much slippage. A simple cleaning of the belts and pulleys with mineral spirits can solve this problem.
================
After-market belts:
NOTE: One can find after market belts that serves to drive these machines but not without some problems as they are usually wider belts and don't fit the pulleys well. In this case some adjustment will be necessary.
SewTechnical Home

Mar 28, 2014 | Bernina Sewing Machines

1 Answer

Bernina 830 tension belt old how do i adjust the belt tension so it does not slip


Remove the end cover.
The tension mechanism will be visible. Loosen the screw, apply some tension, retighten the screw. Quite easy to do,

Oct 21, 2013 | Singer 3116 Simple

1 Answer

I have a quantrum XL-100 and i cannot adjust tension and the wheel is very hard to turn. i have tried every thing i know how to do and i still cannot adjust tension or decrease tenision on th side wheel...


The tension for the motor belt is adjusted by loosening and altering the position of the mounting bracket of the motor....do not overtighten, it needs to have some give or you will overload the motor.

Sep 05, 2009 | Sewing Machines

2 Answers

Belt came off


well that is very nice idea you can fix with your self provide talls most commonly use.Set of screw driver,open and socket wrench,pliers etc...Remove the top cover plate by loosening bolt holding the cover and cover besides the handwheel where the motor was installed besure it was unplug from ac source(No power)Check the motor holder that attaching from casing.You can see the motor coupled by the belt.In the motor holder there is a bolt slot adjustment for tensioning belt tighning and loosening.If you want to disconnect the belt and replaced loosen the tension and pull out the belt.Sometime belt are sliping to the pulley it affect
the sewing machine operation,you can tighten from adjusting the tension of the belt.adjust not so tight after adjusting try to run manually first by turning handwheel freely if the motor will run freely with out obtruction no power supply.If your satiesfied try to run with power supply but jag twice first to be sure no problem occured before continous operation.

Mar 07, 2009 | Brother LS-2125 Mechanical Sewing Machine

2 Answers

Machine No. K1831(256) No.28 how do you set up the stop motion wheel to wind bobbins. It either winds bobbins whilst sewing or just free wheels. I think there must be a way of adjusting this action....


Oct 26, 2008 | Singer 7462 Mechanical Sewing Machine

1 Answer

How do you change the belt on a Singer 7462?


Hi,
By removing the top cover, or the turning wheel cover,
you will be able to see the belt.
If the belt is not broken, then try to adjust the belt tension,
by adjusting either the height of the motor, or the tension wheel.

May 28, 2008 | Singer 7462 Mechanical Sewing Machine

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