A 9/16 inch hex key should work fine without modification. I used a 9/16
when I was unable to find a 14mm. The 9/16 is ever so slightly larger -- but
works on the differential plug.
Granger has both a 14mm and 9/16 hex key. I was unable to find them at the
local AutoZone.
Dan Steadman
1980 300D
1980 300TD
----- Original Message -----
From: "OK Don" <[EMAIL PROTECTED]>
To: "Mercedes mailing list" <[EMAIL PROTECTED]>
Sent: Monday, July 18, 2005 1:43 PM
Subject: Re: [MBZ] 76 300D Diff Plug Removal?
A long time ago I bought the next larger English size Allen wrench,
ground down the sides just enough to fit the plug. It's been working
fine for for over thirty years now. The plug is usually pretty tight.
Clean it really well to get a good fit with the wrench, use PB Blaster
as Rich said. I use the handle from a bottle jack as a cheater bar on
the Allen wrench, lie under the car (supported on stands), and kick
the handle to loosen the plug.
On 7/18/05, Rich Thomas <[EMAIL PROTECTED]> wrote:
Autozone had a set of hex/allen sockets (well, the reverse of a socket,
whatever you call it, that fit on your socket ratchet) that included the
correct size (which I forget, you might be correct) for not much money
($6 or7), look pretty good too. Hit it with a lot of PB Blaster before
trying to loosen it if it won't budge..
--R
R A Bennell wrote:
>
>I want to pull the plug in the differential and at least check the oil
>level
>as it appears there may be slight leakage - the diff is a bit wet but no
>puddles form under the car when parked. Is the plug 14mm? That seemed to
>be
>the most likely size. I tried using the head of bolt as the hex wrench
>but
>had a hard time holding it well enough and the two nuts that I locked
>together to form the part that I would turn insisted on moving before the
>plug moved. If I cannot find the proper hex wrench, I may weld the nut on
>so
>that it cannot readily turn. Any other suggestions for breaking it loose
>without damage?
>
--
OK Don, KD5NRO
Norman, OK
'87 300SDL
'81 240D
'78 450SLC
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