Sampo Rosenlew HR46, Instruction Manual

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24
A B C
D
Drive motors 2-speed range(high speed
range) is turned on using directional valve A.
The operations of the brakes (fig. 24) are
controlled by directional valve B. The brakes
get disengaged when the pressure is dire-
cted to the housing of the hydraulic motors
brake. When unpressurised, brakes are on.
Releasing the brakes derive their driving
force from the pump in working hydraulics
by means of a pressure reducing valve.
Individual work pump pressures are set
for the harvester head functions from the
measuring device. In addition, depending
on the head it is possible to set compres-
sion pressures based on the type of tree
being handled for knives and tracks/rolls,
for example (valve C).
A 2-speed valve
B Brake valve
C Harvester head pressurization
D Brakes
The frame lock is equipped with a dual-function cylinder. The cylinder derives its load from the
return flow. When the frame lock is engaged, the directional valve closes the flow routes and
the cylinder becomes locked in its place.
The basic harvester is equipped with a separate cooler for the hydraulic oil. The cooler inclu-
des a pump and condenser. The pump receives oil from the tank as well as from leaks in the
working hydraulics pump and the harvester head, and its pumped through the condenser and
the Suction-/return filter back to the tank.
When dealing with hydraulics, uncompromising cleanliness is of utmost importance. The oils
used shall comply with the Manufacturer´s instructions. Refill shall always be done through
the return filter.