33
A Load Sense Hydraulic Pump is mounted on the end of the main transmission pump. The total capacity of
this pump can be used to power rear end implements up to powers shown on the graph below.
AUXILIARY SPRAY PACK HYDRAULICS
Rear end hydraulics on SAM Horizon sprayers are of the 'Load Sensing' type. This advanced system uses a
large variable output swash plate pump to produce only the oil that is required for any function. It does not
produce any surplus oil and as such produces very little heat. If a second or even third function is operated
then the pump will sense the demand requirements and respond to them within milliseconds.
As hydraulic pump output is no longer dependent on engine speed, it means that the spray pump and a quick
fill pump can run simultaneously at relatively low engine RPM. Maximum continuous working pressure must
not exceed 170 Bar.
Any rear end equipment provided by the customer must be suitable for load sensing closed circuit use.
3-2
The Transmission pump is mounted directly onto the flywheel end of the engine and turns at engine speed. An
electronic signal from the Joystick alters the angle of the 'swash' plate inside the pump, which in turn alters the
stroke of the pistons within the pump, and the result is an infinitely variable oil output from a fixed engine
speed.
A smaller 'charge' or 'boost' pump is mounted on the end of the main pump; its function is to replace oil to the
main pump, which is constantly being lost internally through leakage. It also supplies oil at 30 bar (435 psi)
maximum pressure to operate brakes and 2-speed control. Its final duty is to pump oil from the closed loop
system through the oil cooler.
The main circuit pressure cut off valve is also contained within the pump and is factory pre-set.
TRANSMISSION - HYDROSTATIC PUMP
Summary of Contents for Horizon
Page 5: ...4 SECTION 1 SAFETY ...
Page 14: ...13 ...
Page 15: ...14 SECTION 2 MACHINE CONTROLS 2 1 4000 4000E 5500 6000 MACHINES 2 2 3000 3000E 3500 MACHINE ...
Page 32: ...31 SECTION 3 MECHANICAL COMPONENTS ...
Page 40: ...39 3 8 TYRES LOAD INDEX TABLE ...
Page 45: ...44 ...
Page 46: ...45 SECTION 4 SPRAYING COMPONENTS ...
Page 53: ...52 SECTION 5 SPRAYING ...
Page 58: ...57 ...
Page 59: ...58 SECTION 6 6 1 MAINTENANCE 6 2 Fuses for 3000 3000E 3500 Machine ...