Help identifying replacement patio door roller hardware

A quick learner from Mystic, CT says:

April 26, 2016

Hi,

We have two Dorwal heavy brown metal patio doors from 1974 which need new rollers.
The doors measure approximately 48"W x 79"H x 1"D.
Can you help us identify what replacement rollers we need without taking the doors out beforehand?

Sincerely,
Kristin

User submitted a photo of patio door track.

Paul from SWISCO responded:

April 26, 2016

Hey, Kristin. Is there any metallic AAMA sticker in the top or side master frame? That would be a huge help. Depending on Dorwall Series you could have our 81-033 for the 400 Series, 81-027 for the 800 Series, or 81-030 for 1100/1200 Series. Alternatively, you could remove your existing roller from the door and see how well our pictures and dimensions compare.

A professional from CA says:

April 26, 2016

81-154 or 81-033 seem likely since they have the adjustment hole above the assembly screw.

A handy person from Merced California says:

April 24, 2023

I am in the need of a set of rollers for my Merzon industry sliding glass patio door model 700.
Sorry no pictures.

Tom from SWISCO responded:

April 25, 2023

Unfortunately, without pictures it won't be able to identify a match. If you are unable to remove your rollers for the purposes of identification, I recommend contacting a local professional who can help you with this project.

Acorn Patio Sliding Glass Door Roller

81-030

$9.97

Sliding Door Roller, 1-1/4" Steel Ball Bearing

81-033

$7.66

Sliding Door Roller Assembly, 1-1/4" Concave BB Wheel

81-027

$8.45

Sliding Door Roller, 1-1/4"dia. Concave BB Wheel

81-032B

$6.78

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