AAA-055-00188
Jaylor Owner Manual
-26-
5000 Series Truck Mount Models
18.
HYDRAULIC SYSTEM
Hydraulic Pumps
The augers are powered by hydrostatic pumps which are attached together and powered by a single
driveshaft from the engine. The pumps can be set for either CCW (counter clock wise) or CW (clock
wise) rotation. Typically, a CCW pump is installed if the pumps are mounted in front of the engine
(FEPTO) and a CW pump is used if the pumps are installed behind the engine (REPTO).
Each hydrostatic pump is actuated by an electric solenoid valve which is switched from the in-cab
console.
Each hydrostatic pump is equipped with a spin-on filter. See
for filter replacement type and
general maintenance schedule.
Auxiliary Pump
Located on the end of the hydrostatic pump is a double auxiliary hydraulic gear pump. This pump is
powered by the main driveline for the machine which ensures hydraulic power is available at all times,
provided that the truck engine is running.
The auxiliary pump provides hydraulic fluid power to components such as the unloading door, discharge
conveyor and oil cooler fan.
The auxiliary pump is designed for minimal maintenance and service. See
for maintenance
information.
Hydraulic Reservoir
A hydraulic oil reservoir is located at the front of the machine behind the truck cab. Always keep the
reservoir at least ¾ full of hydraulic oil. At no time is the fluid level to be lower than the minimum level
on the tank indicator as damage to the hydraulic system will occur. If the fluid level is higher than the
maximum level, fluid may overflow the reservoir and cause fluid loss. Check the fluid level in the
reservoir daily and replace with recommended oil as needed. The reservoir has a breather cap located
on the top of the unit, which must be attached to the reservoir at all times during operation. The
breather is removable, to allow filling of the reservoir. Replace the breather
every 6 months
or earlier if
the replacement indicator LED is blinking. See
Section 24.11
The reservoir outlet lines are equipped with external shutoff valves. This is a service feature and can be
closed or shut-off so that items such as filters can be serviced without draining the hydraulic system oil.
Electric Solenoid Hydraulic Valve Controls
Depending on the machine, located either under the conveyor or underneath the front of the drum,
usually on the driver’s side, are the electric solenoid valve controls. Depending on options equipped
with the machine, there may be 3 or 4 electric solenoid hydraulic valves banked onto an aluminum block
manifold. Hydraulic fluid power supplied by the auxiliary pump enters the aluminum block manifold.
The hydraulic flow is divided to the different circuits found on the machine (e.g. discharge door,
conveyor). The valves are controlled electrically from the control console located in the truck cab.
