Hagie 204SP, Руководство оператора, Страница: 44 / 127

SECTION 4 –
ENGINE AND DRIVE SYSTEMS
4-6
Multi-Function Valves
The hydrostatic pump is equipped with
two (2) Multi-Function Valves. These valves
incorporate the system check valve,
pressure limiter valve, high-pressure relief
valve, and bypass valve.
When the preset pressure is reached, the
pressure limiter system acts to rapidly de-
stroke the pump in order to limit system
pressure.
Charge Pressure
To monitor the closed loop system
(hydrostatic pump):
•
Install a 500 psi (34.5 bar) pressure
gauge at the Charge Pressure Port.
• Start the engine.
• Open throttle to full RPM.
NOTE: Charge Pressure should range
between 348 and 365 psi (24 and 25
bar). If below required pressure,
contact your John Deere dealer for
assistance.
Displacement Limiter
The hydrostatic pump is equipped with a
mechanical Displacement (Stroke) Limiter.
Loop Flushing Valve
The hydrostatic pump is equipped with a
Loop Flushing Valve (located beneath
machine - remove screen to access), which
• Rear Gear
Pump
• Displacement
(Stroke) Limiter
• Front Gear
Pump
NOTICE
The Displacement Limiter has been
factory set and requires no further
adjustment. If adjustments are made
without contacting your John Deere
dealer, system damage may result and
will void the warranty.
NOTICE
The Loop Flushing Valve has been
factory set and requires no further
adjustment. If adjustments are made
without contacting your John Deere
dealer, system damage may result and
will void the warranty.
• Charge
Pressure Port