Originally Posted by
JohnDThompson
The
VAR #311 tool was designed for that cup. I've never had much luck with a pin spanner; the slots are too wide to allow the pins to grip well. If there's any corrosion the pins won't stay in the slots.
As it happens, there's a VAR #311 on
eBay right now. Probably a a little expensive for a one-off repair job, but if you plan on doing a lot of these types it may be worthwhile.
[N.B. no relation to seller; I just happened to notice it]