HYDRA-PULL HP 500, Operation And Parts Manual

Page: 26 / 77

OPERATING THE SPREADER
26
Operation Manual
CLEAN WALKING BEAM
When tire valve stems are mounted towards
the inside, clean top of walking beams to
prevent valve stem damage.
WARMING HYDRAULIC OIL TEMPERATURES BELOW 0

F (–18

C)
It is necessary to warm the hydraulic oil
for proper spreader operation.
Follow the procedures in your tractor’s
Operator’s Manual for warming hydraulic oil.
The following procedures apply only to tractors
with a closed center hydraulic system.
BYPASSING SPREADER CONTROL VALVE
There will be a large hydraulic oil pressure drop across the auxiliary flow control valve when the oil is cold. Oil
pressure available to hydraulic cylinders may be too low.
Try cycling the cylinders several times slowly so the cold oil in the cylinders is mixed with the warm oil in the
tractor. In the event of extreme cold; you may need to bypass the control valve to do this. Be sure you begin
by moving the cylinders very slowly.
Reconnect hoses to flow control valve.