New Holland 499 Operator's Manual page 106

HYDROSTATIC SYSTEM
HEADER LIFT
TONGUE
SWING
HYDROSTATIC
PUMP
PUMP
DRAIN
WARNING
Because of the high pressures in these systems,
use only genuine New Holland parts and hoses
for repairing these systems.
WARNING
The relief valve in the hydrostatic system is not
adjustable and should not be tampered with.
Check with your New Holland dealer's service
department if you have problems with the
hydraulic or hydrostatic systems.
The hydrostatic system is completely separated from
the hydraulic system. The hydrostatic system drives
SECTION 4 - MAINTENANCE
PRESSURE
HYDROSTATIC
RESERVOIR
SUCTION
LIFT
CYLINDER
(SLAVE)
FILTER
HYDROSTATIC
MOTOR
(TONGUE)
the cutter bar, reel, auger, and conditioner rolls. The
square section of the mower-conditioner tongue is
used for a reservoir.
The hydrostatic system must be kept free of dirt,
dust, water, rust, etc., or the hydrostatic pump or
motor may be severely damaged. If the system is
contaminated, the entire system must be drained
and flushed with solvent.
IMPORTANT: Do not use the hydrostatic pump to
force solvent through the system. The pump and
motor will be damaged by lack of lubrication.
NOTE: Tongue oil temperature will be 50 degrees - 55
degrees above ambient temperature while running.
4-46
3500
PSI
RELIEF
VALVE
.0935"
SCREW-IN
ORIFICE
PIVOT
CYLINDER
LIFT
CYLINDER
(MASTER)
MOTOR
DRAIN
65