re: Hydraulic Pump Rebuild - Day 6

[Phil Rose <pjrose@servtech.com>]

>Date: Tue, 23 Feb 1999 16:52:25 GMT
>From: quk@isham-research.demon.co.uk (Phil Payne)
>Subject: Hydraulic Pump Rebuild - Day 6

[snip]
>Then home, and a pounding session with the impact driver.  Got the
>main piston covers off, the seals out and the pistons too.  Switch
>my attention to the 4mm Allen screws covering the other seals.
>
>OK - now what?  Both will take a 5" Beargrip 4mm Allen key to 30
>degrees.  If I put more torque on, I'll snap the key for sure.  They're
>both on the same side of the pump, so I have them both soaking in
>PlusGas.  Any ideas?
>
>- --
> Phil Payne
> Phone: 0385 302803   Fax: 01536 723021
> (The contents of this post will _NOT_ appear in the UK Newsletter.)

bloody deja vu.

Three months ago, I faced the same hurdle with my '91 200q's pump.
Everything *else* went quite smoothly. Then came the stubborn check valves.
Igor K. and others were quite encouraging about "slam 'em good and hard
(i.e. impact wrench), and they will come". However after soaking them a
couple of days in penetrating oil and eventually breaking/twisting 3 Allen
key sockets, I gave up on both of them. The (partially) resealed pump has
about 1000 miles on it now, and no sign of leaks, knock on zebrano (and it
wasn't previously leaking from the valves.) Rumor has it that leaks from
the check-valve seals are uncommon; YMMV.


Phil Rose				Rochester, NY
'91 200q				mailto:pjrose@servtech.com
'89 100