Cub Cadet I-Beam Style - Manual (Page 213)

6-16
All two-stage log splitter pumps have the same
basic hydraulic circuit. Two gearsets (one large
and one small) use a common inlet and outlet.
A sequence valve bypasses the flow of the
larger pump gearset at a preset pressure. A
check valve at the discharge between the two
gearsets allows both flows to combine at low
pressure, and isolates the larger gearset from
discharge above sequence pressure.The
sequence valve responds to a pilot pressure
from the smaller gearset, which is close to the
actual pressure at the cylinder. The flow from
the large Gearset is by-passed internally back
to the pump inlet.
The two gearsets together put out a large flow
which results in fast cylinder cycle time at no
load. After sequence pressure is reached, the
small gearset alone can reach several times
greater pressure to do the actual splitting. But
because the discharge flow is correspondingly
less, this increase in splitting force doesn’t
require any more engine horsepower.
The sequence valve is set at the factory and
should not be reset. The setting is calculated to
give maximum flow until the discharge pres-
sure is near motor stalling load. This valve
does not affect splitting capability.
The pump discharge goes through a four-way,
three-position flow control valve. In neutral
(center) position, the flow returns to the tank
without doing any work.
Log Splitters 2.fm Page 16 Wednesday, February 20, 2002 1:35 PM