Window regulator spring tension - why so strong? Also window roller question!

[BartonStag]

Hi all,
Have stripped the window regulator assemblies to freshen them up, which has bought two questions to mind - any thoughts as always would be appreciated.

1) why is there so much tension on the spring - roughly one revolution of the mechanism before fitting the motor/g'box into place. Is the motor not capable of raising or lowering the window (whichever i'm honestly not sure without checking) unassisted? If not, does it not then have to overcome any tension in the opposite direction?

2) I purchased new rollers and pins for the window assy, but the pins are shorter than the plastic rollers, so when you peign the pin over - the roller locks up. Surely the roller should "roll" in the relevant frame channel not be rigid, thus squaring off the roller?. Just like to confirm i'm not missing something here, as i've freed one up, haven't yet fitted the 2nd but am not convinced the spec of the design is correct.
Look forward to any thoughts
Cheers
Gord

[sujitroy]

The spring is to assist raising the window. that arm can be used for both sides so make sure when you put the spring back it is put on the right way. the arm has 2 part numbers stamped on it ending with LH for one side and RH for the other. the motor mount is handed

[dasadrew]

That pin doen't sound right.
Here are some pics of how the pin should look.

https://socforum.com/forum/forum/stag-owners-club/soc-forum/852683-window-lift-roller-and-pin

[richardthestag]

The springs avoid the use of a pair or large electric motor in the rear seat area, I do love potential energy and my 1970s / 1980s basic education. I often found that liberal use of a degreaser followed by a splash of water and then a spray grease, refurbished most window drop glass regulators with a greatly reduced risk to finger loss.

Rollers need to move, I would have thought an 8.8 grade or above bolt and nyloc might replace the rivet which is clearly supplied too short as you noted.

Good luck sir, always best to question and not accept as you have found in my response

[dasadrew]

ou might be tempted to have a look at this too:

https://socforum.com/forum/forum/stag-owners-club/technical-section/electrics/26371-dasadrew-s-electric-window-lift-overhaul

[BartonStag]

Many thanks to you all for your responses, very much appreciated
Cheers
Gord