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Old 05-15-2023, 01:42 AM
GraceSea GraceSea is offline
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More Rear Oil Seal - Coupler Removal Issues

I am trying to replace the rear oil seal on my A-4/Columbia 28 Mk1 (or tighten the lock nut as noted in Don's video (there is a bit of fore and aft play in the shaft)). I have an unusual coupler (damper)?, as shown in the attached photos. I removed the two set screws in the rear portion, but the coupler will not budge. Work space is VERY tight, and trying while in the water.

Any suggestions?

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Old 05-18-2023, 09:49 PM
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Al Schober Al Schober is offline
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Remove the 3 big bolts holding the coupling to the transmission flange. The coupling and shaft should slide back.
This will expose a large nut holding the transmission flange in place. Remove the nut, lock washer, and the flange.
You'll be left with two flanges against the gear box. Remove the 6 bolts and the first flange, which carries the oil seal. Don't mess with the second flange unless you want to replace the bearing.
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Old 06-02-2023, 01:48 AM
Grappler Grappler is offline
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I had to remove the direct drive coupling and rear oil seal retainer from my “new” A4 yesterday.

I watched a YouTube video of Don Moyer explaining how to do it, and that helped.
Here’s the link:

When I got to the part where Don used a special tool to keep the oil seal retainer from turning while removing the 1 1/8” nut, I used his suggestion to use a pipe wrench instead. But I had to get a 24 inch pipe wrench, which just barely had enough jaw opening to grip the 3.5” diameter coupling.

When I got to the part where Don used 3/8” fine thread bolts to pull the coupler off, the only bolts I could find were too short to do the job. And I did not have the other special custom tool he used to do it. So I bought a cheap 4” gear puller from Menards, and that pulled the coupler off.

Craig Wiklund
Allegro (Columbia 36), Red Cliff, WI
Nansen (Chrysler 26), Bloomington, MN
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The Following User Says Thank You to Grappler For This Useful Post:
thatch (06-02-2023)

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