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For years I had heard reference to the fact the 74 tii clock
was unable to be repaired compared to clocks in 72-73tii's. They were said
to be cheaper. That being said, I figured that I had nothing to lose -
either find the problem or destroy it trying...
Mine was running but not advancing properly. It grunted a
lot in the quiet when the car was turned off. It seemed to advance 5 minutes
for every 2 hours. Something was definitely not turning right.
When you have removed it from the dash, the back side is
to be observed first. |
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Remove the face of the clock carefully with needle nose to
open "the can". |
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Once off, you can separate the movement from the housing by
removing the three nuts with paint on them. |
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Here's the guts. Keep disassembling the clock, you're almost
to the epicenter of the problem, which is where the two smallest gears meet
in the middle of the mechanism! |
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OK, long description here. My digital camera cannot
photograph things as small as the center shaft of the clock so the
description has to do the job. 1) Remove the three
brass nuts. Remove the clear plastic cover.
2) Clean and lubricate the tiny worm gear connected to the shaft that runs
the hands of the clock at the point where the armature winding shaft and the
clock hand shafts meet.
3) Reassemble and put the clear cover and three brass nuts back on.
4) Apply the 12V test leads from a small power supply or battery to these
posts to turn the clock on.
5) Set the clock to the current time and observe the movement for 15 mins to
ensure it is working. This step is iterative, your clock may need several
attempts to get it to work smoothly, mine did.
6) When it's back keeping time, reassemble everything.
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7) The clock face rim needs to be reconnected, then restored
with paint. The bad part is covered by the overall sun visor for the clock
so don't worry about the sides. Make sure and clean the glass on the inside,
it's your last chance! |
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I realize that there may be other symptoms to the clock being
bad, however this solved mine. I expect it is a manufacturing problem with
simple wear that keeps the winder and the hands from solidly meeting at the
gear teeth that is the root cause of most of these units.
Let me know how it works for you.... |
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