Everybody, who works with hydraulic pumps and motors, knows what a
Sauer Danfoss series 20 pump is. This is an old school design, which
has existed for decades. In fact, there's a factory in Europe that
still has this series in production.
Throughout the years these pumps have proven to be
"bullet-proof", WHEN at least a modest amount of preventive maintenance
is involved. However, when a pump hits 20000 hours of
continuous service unspoiled by annoying service stops,
surprises like the one you see on these pictures should be expected.
The detail of the shaft separating in two without
doing any but thermal damage to the charge pump shaft is just
My favourite picture of this lot is definitely Pic.11.