Page 18
Speed Level Seres - Servce & Parts Manual
January 2019
Secton 5 - Hydraulc System
Hydraulic Roadmap
Hydraulic Reservoir
Hydraulic fluid is held in the reservoir for delivery to the various components and then returned to
the reservoir. Returning hydraulic fluid is routed through a filter before entering the reservoir. The
reservoir also serves as the oil cooling device.
Pump
The pump delivers hydraulic fluid under pressure to the main hydraulic manifold.
Hydraulic Manifold
The main manifold directs the hydraulic fluid to the hydraulically operated components and returns
fluid to the reservoir through the use of electronically operated solenoid valves.
Drive And Brake System
There are four (4) hydraulic, fixed-displacement gear wheel motors to provide power to all four wheels
[two (2) front and two (2) rear].
The two rear wheel motors have integral spring-held brakes. The brakes are released by hydraulic
pressure developed in the drive circuit during drive mode. A fixed orifice in the brake circuit controls
the deceleration rate and initiates a smooth stop.
Floating Axle Lock Cylinders
Two (2) hydraulic cylinders control the floating axle on the front of the machine. When platform is
elevated, the cylinders lock into place to increase machine stability.
Steering System
Two (2) hydraulic cylinders control steering.
Lift System
The machine is equipped with one (1) hydraulic lift cylinder.
Tilt System
The boom and platform tilts as a unit to provide a level work platform, regardless of chassis level.
One (1) hydraulic cylinder provides tilt from front to rear, and one (1) hydraulic cylinder provides tilt
from side to side.
Optional Generator System
If equipped, the generator is driven by a hydraulic motor which receives hydraulic fluid directly from
the pressure port of the pump.
