Coil Spring and Mounting Bracket Questions

A landlord from Renton, WA says:
April 28, 2021
Hello Swisco Technical Support: I have a Cascade Design (CDI) single hung window with a broken coil housing pivot. It appears to have the number "6" imprinted on the spring so I assume its rated for 6 lbs. The sash weighs about 17 lbs. The springs appear to be in good shape, but should I order new coil springs 5180-6 from you? I need to 2 in each coil housing 15-086 and 15-087. I was not sure if your coil springs are prelubed or if I should attempt to lube my springs and with what lubricant. Also, both mounting brackets tore from the window frame when the panhead screws came out. Should I used oversize screws or do you sell a frame repair kit? I thought of filling the hole with epoxy and then install the correct size screws. Your answers would be greatly appreciated.
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Paul from SWISCO responded:
April 29, 2021

You can reuse the coil springs if they are not damaged. No need to lubricate them since they are stainless steel springs. For the the 16-024 mounting bracket, I suggest using a longer screw that will reach back to the wood frame behind the vinyl track. I think from the tension of the springs when raising the and lowering the sash might force the screw out of the epoxy repair.
Tandem Coil Housing
Tandem Coil Housing
15-086
$1.68
Coil Housing Pivot
Coil Housing Pivot
15-087
$5.97
6 lbs Series 180 Coil Balance
6 lbs Series 180 Coil Balance
S180-06
$4.45
Mounting Bracket
Mounting Bracket
16-024
$0.66
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