Force and lever arm

Procedure Fill the bucket halfway with sand. Place your arm flat on the table.

Force and lever arm

Components Parts Seat, Headrests, Adjustment, Height adjustment, Head rests Removal, Seat removal One of the items to give me most trouble is the drivers seat adjuster lever, located on the onside of the drivers seat.

The moulding would have cost pence to produce, and is relatively cheap to replace at under a fiver, is easy to fit Force and lever arm it just should not fail in the way it does. I have had mine replaced 3 times during the last 18 months, not good if you are having to pay. Part No A 10 60 make sure to order the correct colour as it is moulded in different colours, Colour coded When it comes to fitting look for the lugs inside the moulding there should be four, three on short legs and one close to the back of Force and lever arm moulding.

A because the moulding one photographed has been used and then removed one of the four had snapped off, making it unusable, without it keep coming off.

Fitting, If I were doing one I would warm the moulding to at least room temperature F first which will make the clips more flexible and less likely to snap off as you fit the moulding, apply a very small amount of lubricant onto the face of each clip that contacts the fixing point this will assist in in sliding into position without snapping the clips off the moulding.

These units are not designed to be removed without breaking the clips. However things move on: The part number remains the same, along with the colour code on the end either slate grey or light grey, because of the location of this component it makes little difference which you fit. Hopefuilly this will prevent having to keep replacing this unit.

I have ordered one today so will keep you posted along with some photographs when I receive it. Thank you Mercedes-Benz of Exeter tel who supplied the part by post next day delivery. LoftyThanks you David for the information. This is without doubt the best modification to a component that I have seen on the A Class.

It should save us all a lot of grief and prevent the continued need to replace this lever as well as cost.

Fitting this unit is very simple indeed the photographs below explain the procure. I have used a slate grey unit Colour code 7D88 which does not look out of place as other components like the steering wheel are slate grey on my car.

Remove the old unit which will not be difficult, if indeed it has not fallen off already! Take the opportunity to clean and lubricate the mechanism.

Fit and push the plastic retaining peg fully home until flush with the top of the lever. Should you at any point wish to remove the lever, place and allen key into the hole at the base of the lever and push the retaining clip up, which will allow you withdraw the clip from the lever.

Time taken to fit this component 10 mins including cleaning and lubricating the mechanism.

Force and lever arm

A worthwhile modification long overdue. There are five headrests, restraints are provided as standard, four larger than the remaining one which is normally located in the centre back seat position.

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However my centre rear headrest is removed to it is stowage area. This allows the driver to see when reversing. There main task is to prevent wipe lash sudden and severe whipping of the head in a backwards direction causing injury to the soft tissue and vertebra of the neck Normally caused by rear impact accidents other drivers driving to close to the rear of your car and thus unable to react and avoid a rear impact collision with your vehicle.

To get the best protection they need to be adjusted so that the top of the cushion is at least level with the top of the passengers head.

All headrests are interchangeable, and can be completely removed to allow the folding of the rear seats. To reduce the noise level, remove the rear seat rests in turn and slightly spread the legs, then replace. To remove the rest simply press the clip 1 at the same time easing the rest from the seat 2 The centre rest can be completely removed and stowed in a pre-allocated stowage rack at foot level, centre to the rear seat A, B, and C The centre rest can even be left in that stowed position when the seat is parked in the folded position.

The other two rear headrests will however have to be removed from the seats To adjust the rest up simply pull it up, there is a stop to prevent it coming right out of its location. To lower press 1 indicated inset above push down to the desired height, When removing the headrests from the outer and front passenger seats the headrests can be stowed in the doors as shown.

One of the most annoying things about the headrests is the vibrating noise they make while the car is being driven, This more often than not can be cured by either spreading the legs on the rests themselves making them a tighter fit or by replacing the restraint location guides in the backs of the seats.

If you are replacing these units then they should be purchased in pairs ,locking and non locking. In my experience it is only the two outside rear seats that require replacing, I use the alternative location for the rear centre seat and the fronts are OK.

Now if you do wish to lower your head restraints The you will need a tool like we used to remove the dash cowling. A hooked tool 4 the hook needs to be approx 7mm long and has to be inserted into the guide 60mm so allowing for the handle I made mine 16cm overall, The clips that retain the guides are on the cushion side of the guide 2 Front Having removed the head restraint Push the tool inside the guide and feel for the slot in the front slightly to either left or right Having engaged the hook into that slot turn the tool 3 towards the middle of the guide and the same time gently pull the guide up from inside the seat, you will feel when the clip has released.

It is a fiddle, bit like breaking into a safe! But it can be done, and it is how MB technicians do the job. Having removed the guide trim off the minimum amount of plastic A. This modification allows the head restraint to be pushed down further, thereby reducing or eliminating the vibration completely.

If you have problems please go to page 45, the principle for removing the restraint guides is the same as removing the dash board cowling. Although the distance between the back cushion and the head restraint is not a great deal different it does make a difference.

However when carrying passengers do remember to adjust the restraints to suit.Lofty's Homepage, Mercedes-benz 'A' Class, Components, information in respect of seats, adjustment, removal, replacing, Head rests, arm rests SRS connection passenger seat, Modifications.

Related Tools. Convert torque into different units; Convert force into different units; Convert length into different units; User Guide. This tool will calculate the torque generated around an axis by a force applied at right angle to a lever arm of a specified length. Shoulder Abduction Force Vector Diagram (frontal plane) E.g.: Dumbbell Lateral Raise and Lying Lateral Raise.

Angle of Pull. Upper: Supraspinatus Lower: Lateral Deltoid Rotary component perpendicular to lever arm; Stabilizing component.

One of the items to give me most trouble is the drivers seat adjuster lever, located on the onside of the drivers seat. This is a plastic moulded (ABS construction) unit which fits onto the seat adjustment mechanism with lugs which engage onto metal clips, it just isn't up to the job. The turntable and lifting arm motors both use gears to "gear down" the motion (decrease speed and increase force).

You will notice that this keeps you from being able to turn the motors by hand. In physics, a lever (from French lever, meaning "to raise") is a rigid object that is used with an appropriate fulcrum (pivot point) to multiply the mechanical force that can be applied to another object.

The lever allows less effort to be expended to move an object through a distance. This enhancement is also termed mechanical advantage.

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