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Old 07-30-2014, 01:36 PM   #1
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san antonio , Texas
Join Date: Oct 2012
Posts: 1
Water Fill Compartment Lock

greetings all,

i have a '76 Trade Wind that we're slowly refurbishing.

i was going to sanitize my water tanks, but i'm having a problem with the lock on the water fill door.
it doesn't want to open.
i've used WD40 and some graphite, but nothing so far.
from the "locked" position (12 o'clock), the key turns slightly to the left (10 o'clock) and stays there. the door does get a little loose, but remains shut.

any recommendations?



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Old 07-30-2014, 02:37 PM   #2
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1973 21' Globetrotter
Houston , Texas
Join Date: Sep 2009
Posts: 2,262
Welcome to the Forums!

I had a similar problem with mine (didn't have the key for it, and it was a different lock than every other hatch on the trailer). So I pulled out the gaucho that the water fill is behind, and I was able (with minimal brute force) to remove the "latch" from inside, which then allowed me to remove the locking assembly, and to replace the whole shebang.

All of this, was, of course a total waste of time, as that water fill door is very poorly designed and allows water running down the side of the trailer to funnel down into your fresh water tank. You might wonder just how much water could possibly get past the fill door, and I tell ya, its a lot. I had a bucket under the fill inlet inside the trailer during my renovation, and it would easily collect a gallon of water during a moderate rainstorm. Since the plastic "funnel" shaped thing was cracked anyway, I eventually swapped the whole assembly out for a modern stainless steel number with a screw cap and a gasket around the door. No more nasty run-off in my freshwater tank now.

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Old 07-30-2014, 03:14 PM   #3
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1973 27' Overlander
Portsmouth , Virginia
Join Date: Jun 2012
Posts: 776
I replaced the whole door assembly as well as part of this years renovations. It was documented here:


Ongoing adventures at:
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Old 07-30-2014, 03:27 PM   #4
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1986 34' Limited
1975 27' Overlander
Conifer , Colorado
Join Date: Jun 2009
Posts: 3,857
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I lost the key to my door on the 86. I've been using a small screwdriver for the last 10 years. These locks are very inexpensive, but I haven't ordered a new one. I can feel the "tumblers" with my small screw driver and I just lift them and turn.

Keep soaking with penetrating oil, and maybe try a screwdriver for added rotational force.

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