Replacing a Wright Knob Latch,
Model V670 on an Aluminum Storm Door
Wright Knob Latch, model V670, UPC code 0 38462 75901 3
Available at The Home Depot on 5/3/2013, price $9.94
Old Knob Latch before removal
Outside knob Inside handle
Problem with the old Knob Latch
Outside knob fell off
Below is an inside view of the old latch on the left and the new latch on the right. Notice that a special crimped, retaining washer is missing on the old latch. This washer is factory installed and is crimped and pressed into place. The washer holds both the outside door knob in place and the spring inside the knob in the proper place. This washer wore out, fell off and allowed the knob to pull off the shaft.
With the special crimped, retaining washer missing the spring inside the old knob no longer centers the knob on the knob bracket. Besides the knob falling off, the missing spring tension allows the inside door handle to droop because of its weight. This allows the inside handle to slip off the strike plate and the door to swing free.
Inside view of old knob on left, new knob on the right.
Removing the old Wright Knob Latch
Remove the upper and lower screws on the inside latch handle bracket.
There are four available screw holes on the inside latch bracket. Screws pictured here are in the inside upper and lower screw holes - the holes closest to the handle. The screws on your latch may be located in the same holes or any of the other available screw holes.
Important: Make a note of which screw holes are used in your latch. You'll need to orient the inside of your new Wright Knob Latch to the same arrangement.
After removing the two latch retaining screws, remove the outside knob and knob bracket, the inside knob/handle spindle shaft, and the inside handle and handle bracket.
Make sure the three holes in the door are clear of all parts.
The door pictured here is a recycled storm door. I didn't install these holes. I don't believe whoever drilled these holes could have done a poorer job if they'd used dynamite.
These holes are hidden when the latch is installed so I guess there's no harm done. Still, they did a lousy job.
Inside of door Outside of door
Prepare the new Wright Knob Latch
New Wright Knob Latch, model V670, still in blister pack
New Wright Knob Latch, model V670, unpacked
Orient adjustable bosses (retaining screw receptacles) into the proper positions to fit the holes drilled in your door. See the photo below.
Use caution when working with the bosses and brackets since they're made of an aluminum alloy and are rather soft. They could strip or break easily if too much pressure is applied to them.
Orient bosses to fit the holes in your door
Insert the spindle shaft into the knob.
This spindle shaft fits loosely in the knob and slips out easily so handle carefully.
Install the Wright Knob Latch bracket in the door
Insert the outside knob and knob bracket onto door - left photo below. Be careful that spindle shaft does not slip out of knob.
Once in place, make sure the knob is in the position that it will be in when the spring alone is exerting force on it. In other words, don't turn it out of the position it wants to be in when you're not holding it.
If your door is hollow, be extra careful that the loose spindle shaft does not fall into the door cavity.
Insert the inside handle and handle bracket onto door - right photo below. Align the inside handle in a horizontal orientation before mating with the spindle shaft.
Outside knob and knob bracket Inside handle and handle bracket
Install upper and lower screws in inside handle bracket.
You will likely have to gently move the inside handle bracket and outside knob bracket slightly to get screws to slip into the screw bosses in the knob bracket. Cross-threading is a real possibility here so use caution.
After getting the top screw started, leave it loose while you start the bottom screw.
When both screws are definitely started, tighten them up.
Remember, this a soft metal and will strip easily so don't over-tighten.
Inside latch and latch bracket installed.
Outside knob and knob bracket installed.
The strike plate from my original Wright Knob Latch was still good so I didn't replace it.
Inside latch handle mated with original strike plate.
If the inside handle catch doesn't slip over the strike plate bar easily and properly, you may have to loosen the screws on the inside handle bracket and shift it to one side or the other slightly to get a proper fit. This only works if the holes in the door are large enough to allow the screw bosses and spindle shaft to move.