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Section 2 - Rumble Hog Systems
2.3 hydrostatic drive System
The hydrostatic drive pump is bolted to the OMSI
gearbox. It is powered by the truck engine and
primary drive shaft connecting transmission to
the OMSI drive.
The closed loop hydrostatic drive system is ac-
tivated by the OMSI PTO switch on the joystick
switch panel. A swash plate controlled by the
joystick and TRUCK SPEED dial directs fluid flow
and pressure output from the pump, setting the
speed and direction of the hydrostatic drive motor.
Hydraulic fluid is provided by the hydraulic sys
-
tem reservoir/cooling tank. A circulation pump
and heat exchanger with cooling fans provide
continuous cooling for the hydraulic fluid during
operation. Electric solenoid valves, activated by
the joystick and TRUCK SPEED dial control the
fluid flow in the system. A dedicated, in-line spin
on type filter protects the system from debris. A
pressure gauge near the filter alerts the operator
when the filter is dirty and requires changing.
2.4 Fluid coolers
The RH7500 is equipped with coolers for the en-
gine, transmission, drivetrain components and
hydraulic system.
Engine And Drivetrain Coolers
Heat exchangers that cool engine oil and trans-
mission fluid are located in front of the radiator
in the engine compartment and on the chassis.
The heat exchanger for the hydrostatic drive is
located above the passenger side tool box. Refer
to the truck chassis and OMSI operation manuals
for additional information on the operation and
maintenance of the engine and drivetrain cooling
systems.
Hydraulic Fluid Coolers
Two heat exchangers are located on the top and
side of the hydraulic fluid reservoir. Each cool
-
ing unit is equipped with fans that run constantly
whenever the hydraulic system is activated.
Heat exchangers loose efficiency if they become
dirty. It is important to inspect cooling fins at least
once a week and clean them as necessary. If they
are not cleaned regularly, debris can buildup to
Hydrostatic Drive Fluid Filters & Cooler
Hydraulic Fluid Coolers
the point where the coolers become ineffective,
causing the fluid and components to overheat.
This can result in severe damage to hydraulic
system components.
Содержание RH7500
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