TM 5-3810-307-24-1-1
STEERING SYSTEMS
DESCRIPTION
The crane is equipped with four steering systems,
FRONT AXLE STEERING FROM THE SUPER-
one for steering the front axle from the carrier, one
STRUCTURE.
for steering the rear axle from the carrier, one for
The system for steering the front axle from the
steering the front axle from the superstructure, and
superstructure consists of the third section of the
one for steering the rear axle from the
hydraulic pump, the integrated outrigger valve,
superstructure.
double selector valve, and front steer cylinders. This
system is primarily used for maneuvering the crane
FRONT AXLE STEERING FROM THE CARRIER.
into tight areas on the job site and is operated by the
The system for steering the front axle from the carrier
FRONT AXLE STEERING control switch on the front
consists of the steering pump, single selector valve,
console.
double selector valve, miter gear, front steering gear,
The steering mode control handle must be pulled out
and front steer cylinders. This system is primarily
to steer the front axle from the superstructure.
used for roading the crane and is operated by the
steering wheel in the carrier cab.
REAR AXLE STEERING FROM THE SUPER-
The steering pump is driven by the engine. The
STRUCTURE.
single selector valve and the double selector valve
The system for steering the rear axle from the
are mechanically linked and operate together. The
superstructure consists of the steering pump, single
two valves are controlled by the steering mode
selector valve, steering control valve, steer reversing
control handle. The handle must be pushed in to
solenoid, steer selector valve, and the rear steer
steer the front axle from the carrier. The miter gear
cylinders. This system is used for job site travel and
transmits the mechanical force from the steering
is operated by the steering wheel in the
column in the cab at a 90 degree angle to the
superstructure cab.
steering gear which is connected to the wheels
through the drag link and tie rod. The steering gear
The steering pump feeds the system through the
also directs hydraulic flow to the applicable side of
single selector valve. The steering mode control
the front steer cylinders which provides the power
handle must be pulled out to steer the rear axle from
assistance for steering.
the superstructure.
REAR AXLE STEERING FROM THE CARRIER.
The steer reversing solenoid is located on the
electrical swivel and the steer selector valve is
The system for steering the rear axle from the carrier
located in the turntable center section. The purpose
consists of the steering pump, single selector valve,
of these components is to reverse the direction of the
steering selector valve, steer control valve, and the
hydraulic flow to the steer cylinders in accordance
rear steer cylinders. The system is used only at low
with the position of the superstructure. This means
speed to provide the additional maneuverability
that the crane will turn in the direction the steering
needed when steering the crane into a tight area for
wheel is turned whether the superstructure is facing
parking or when near a job site. The function is
the front or rear of the carrier.
operated by the REAR AXLE STEERING control
switch on the front console.
THEORY OF OPERATION
FRONT AXLE STEERING FROM THE CARRIER.
Hydraulic flow for steering is provided by the steering
The steering mode selector must be in the CARRIER
pump. Flow from the pump is routed through the
position (handle pushed in) to enable steering
single selector valve to the front steering gear. As
control.
the steering wheel is turned, the miter gear transmits
the mechanical force at a 90 degree angle to the
