[Healeys] Sump oil pump

[John Harper]

John

Adding to what Rich has said, the 100 pump is very similar. However even 
though the bottom can be machined to take the grooves out of the bottom 
aluminium plate it is also likely that the end float of the gears will 
be greater than the recommended 0.003". Although there does not appear 
to be grooves in the top of the housing there is still wear in some 
cases where the gears run. Gravity should eliminate this but this does 
not appear to be the case. Therefore it might be that you have to also 
machine the housing. I assume that the grooves are due to debris getting 
into the pump.

Although I would not necessarily recommend this I have successfully 
'machined' both faces using abrasive paste on a sheet of thick plate 
glass.

Best regards

>
>The twin gear pump from your BT7 will have two places that can wear. The
>most prone is the bottom end plate which is aluminum and it's had a pair of
>steel gears spinning on its surface for all its life. This action tends to
>cause a milling action that can wear twin circular grooves in the softer
>aluminum end plate. Back in the day, it was common for BMC to recondition
>these pumps by simply milling that end surface smooth and flat again. So
>much for that end wear.
>In addition the twin steel gears can wear slightly against each other and
>are readily available and can simply be dropped into the original pump body.
>
>Job done, wear eliminated.
>
>Rich
>
>-----Original Message-----
>From: healeys-bounces at autox.team.net [mailto:healeys-bounces at autox.team.net]
>On Behalf Of john spaur
>Sent: 2011-10-30 8:05
>To: healeys at autox.team.net
>Subject: [Healeys] Sump oil pump
>
>I did not find out much using the archives.
>
>I have a standard gear type oil pump which seemed to work fine when I
>took it out. I have not taken it apart yet. Should I? Are these
>straight forward to rebuild? Are the replacement pumps made by "Country"?
>
>Thank you,
>John Spaur
>'62 BT7
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-- 
John Harper