Counterbalance Safety Valves
The inner, knuckle and extension boom cylinders are
equipped with pilot operated counterbalance valves
integral to the cylinder on the load holding sides.
The stabilizer cylinders are equipped with dual pilot
operated check valves. The counterbalance valves positively
hold the load during normal operations. The valves
additionally provide collapse protection in event
of a hydraulic system failure or hose break. The counterbalance
valves further control the metering of lowering functions
and provide thermal relief protection in event of
hydraulic oil expansion due to ambient temperature
conditions. The dual pilot operated check valves positively
lock the cylinder in position until the operator intentionally
controls that function.
Rotation System
Slewing is accomplished by means of a rotation turntable
bearing driven by a low-speed, high-torque motor through
a reduction gearbox by means of a spur gear pinion.
Hydraulic System
The 8000 hydraulic system utilizes a PTO driven pump
providing the minimum 8 gallons per minute hydraulic
flow at 2600 PSI system pressure. An eight section
stack type valve is provided as standard equipment.
The standard 8000 crane configuration utilizes 6 of
the valve sections, with the remaining two sections
plugged, but available for use with optional equipment.
Dual control stations are provided for all eight valve
sections. The complete hydraulic system includes the
hydraulic tank, suction line strainer, pump, 8 section
directional control valve, return line filter and
all required hoses and fittings.
Optional Equipment
Boom Options
The 8000 series is available with several boom configurations
to meet various reach requirements. The shortest available
boom is model 8017 with reach to 17 feet. Model 8021
has one hydraulic extension. Model 8026 has two hydraulic
extensions and model 8031 has two hydraulic extensions
plus a manual pullout. STABILIZER OPTIONS: The 8000
series cranes are available with either H-Frame out
and down type stabilizers or A-Frame angled stabilizers.
Hydraulic Stabilizer Extension
Provides two each 2.00² bore cylinders for hydraulic
extension of stabilizers. This option utilizes the
7th and 8th valve sections unused with the standard
crane. This option available for H-Frame type outriggers
only.
Hydraulic Winch
Boom mounted winch system provides hydraulic motor
driven winch with 5000 pounds (2268 KG) single line
pull. Winch option is equipped with complete hydraulic
winch installed with 85 feet (25.9M) of 7/16² (11.1
mm) diameter cable, moveable
sheave block and ball bearing swivel hook with latch.
An additional directional valve is included when crane
is also equipped with optional hydraulic stabilizer
extensions.
Anti Two-Block System
Boom tip weighted switch and 2 unloading solenoid
valves are provided to stop boom extension and winch
raise functions in event of accidental operation of
the winch hook into the boom tip. System provides
protection of crane components and ensures operator
safety. This option available only with above hydraulic
winch option.
Cable Remote Control System
Option provides solenoid operated directional control
valves for control of all crane functions except stabilizer
functions. System includes solenoid operated directional
control valve and toggle switch operated remote control
pendant with 35 (10.6M) cable.
Radio Remote Control System
Option utilizes the same solenoid operated direction
valve as cable remote above except is provided with
a hand held control which functions by radio wave
transmission and eliminates the attached cable thereby
allowing unrestricted operator movement during crane
operation. System has a range of more than 200 (60.9M)
and uses multiplexing signal control to assure there
is no interference from other radio signals. FCC approved.
Proportional Speed Control
System
Option incorporates a electrically controlled variable
flow control valve which provides speed control of
crane functions. Function speed can be varied from
no movement to full speed at maximum system flow.
This optional system can be used with either cable
or radio remote control systems. |
Service
Truck Bodies and Service Trucks
Service
Truck Bodies and Service Trucks
