XR7 Quartz Clock Conversion Guide

This was a fun project to tackle, and I didn’t see much info out there on it so I decided to do a little write-up to help those wanting to do the same. There are instructions that come with the kit, but I think pictures and an actual reference point are nice. If you have any comments or suggestions of your own, please feel free to add.

My XR7 clock was in need of some TLC. Movement wasn’t keeping time, lens was cracked and light bulb diffusers were deformed, so this write-up will cover all.

Quarts Conversion Kit: M-3015 Picked up this Kit on eBay, manufactured by ISI, for under $100 bucks


You can see in the image above the lens was cracked and needed replacing as well. I will follow-up with that on a later post.

After removing the clock from it’s housing, push on the adjustment stem from the rear, grabbing with a set of locking pliers and twist of the cap with another set of pliers. Needs a bit of force.


Next, you’ll want to remove the clock hands. This bit is tedious, you want to gently rock each hand back and forth with your thumb and forefinger as to not scratch the dial. The second hand is pushed in real tight, take your time to back it out.



After all clock hands are removed, you need to remove the dial from the backing. Gently pull up on the tabs (where the screwdriver is pointing below). These tabs are delicate, they most likely will break off if you move them to far or too many times.


Next, remove the 3 lock washers off the backing plate using some pliers. Once removed, you can pull the movement away from the backing. Put the backing plate aside for now.


You’ll then want to remove the gears and washers as picture below from the movement, keeping the pieces in order for reassembly on the Quartz movement.
IMPORTANT, soak the minute movement, second to last from left to right & largest piece in WD40. You want to make sure the gear moves freely when holding the stem.



Continued on next post…

Images are not coming through for me. This might work better if you upload them to your gallery here and then link to them that way. I will see if jay can figure this out. This is a very good write up and I want it to work.

The pieces that come with the kit. You will want to replace the original red gear in the image above with the gear provided in the kit.


The video below goes over replacing the gears and washers onto the new Quartz movement

Place the movement aside. Back to the backing, you’ll want to remove the original brass cup washers and rubber grommets off the backing and replace them with the new ones in the kit. Wider diameter of the new grommet goes on the side of the backing with all the gears, narrower side goes toward the movement.

IMG_0838.JPG


You can now attach the quartz movement to the backing. It really can only go one way, but in the video I point out the gears that need to line up.

Next up, push on the new lock washers over the rubber grommets to secure the movement in place. You have to make sure these are compressed tight. This was the most time consuming part of the restore/conversion.



I will continue the write-up in a follow-up post which will include reassembly, replacing the clock lens, and replacing the the light bulb diffusers.

Great work!

Replacement of the lens

Next, I had to tackle replacing the cracked lens. The repro lenses available out on the market are flat, and not concave like factory. Since this was the case, I figured I’d save some $$$ and just purchase the acrylic myself and drill the necessary holes. Found a 16 pack of 4" diameter acrylic discs on amazon for under $13. (Needless to say, I have a bunch left over, if anyone needs a new lens, PM me and I can get one out you)


The most difficult part was removing the manually adjustable green hand from the original lens. To be honest, I had such a hard time removing it, I decided to break the lens around it until I figured out how to take it apart. There is a small lock washer on the back of the hand that I very slowly pried away at with a pick/awl. Be gentle, you don’t want to bend or break the hand here, it is extremely fragile.


Place the original lens over the replacement and transfer the marks for the holes.


New,sharp drill bits and low speed are your friend for drilling the holes. A drill press made quick work of the task. You’ll need to countersink the hole for the stem, as the cap needs to push into it a bit.



Then just reassemble the green hand and knob



More to follow in the next post…

Very nice work and thanks for taking the time to write it up and post pictures!. Sometimes that takes just as much time as your project does but I forsee this being very helpful for those restoring their clocks

Thanks! It definitely did, but hey, if it empowers just one person to pick up the project and tackle it themselves, than it was well worth it.

Many years ago, before forums, there was the Yahoo List Serve. I had just gotten back into Cougars and wanted to repay just a little bit of the very helpful advice that I got from that group. Amazon had not been invented yet but my company was using Plexiglas in manufacture of some products. I got some thin plex and made up a gig to cut the circles and then the holes. I made a run for about 20 replacement lens and then gave them away to any one that wanted one. Eventually that led to my starting Desert Classic Parts creating reproduction Cougar parts on a commercial scale. SO, 68XR7KitCat be careful you never know where this could lead! Thank you for producing such an excellent write up.

Yea, I do have to be careful. I enjoy working on these projects, but always find there is just not enough time in the day.

Didn’t realize you own Desert Classic Parts, thats neat! But it reminded me that I need to put in an order for the XR7 Dash Emblem and some Toggle switch knobs so thanks for the reminder. :laughing:

68XR7KitKat,
What did you do with the original movement? The winding solenoid and points on my 69 XR7 clock are toasted. I don’t know if the winding assembly is transferable, but would be interested in buying it from you. Also, Rocketman rebuilds the clock movements. He may be interested in a core.

Actually holding onto the movement for now as I want to try my hand at repairing it.

I’m sure Rocketman can tell you whether the parts you are looking for are the same between the two years.

The electric winder bits are transferable between 67-68 clocks and some 1969 clocks, but sometime in '69 they started using pressed on plastic instead of the bolted on fiberboard winders. The 69+ connectors are also different.