Chapter 2 Specifications 9
PERFORMANCE CHARACTERISTICS
SPECIFICATIONS
SPEED
CRANE ROTATION WITH TIREHAND
370°
45 seconds
INNER BOOM ELEVATION
-23° to +67°
25 seconds
OUTER BOOM ARTICULATION
112°
19 seconds
EXTENSION BOOM
40”
6 seconds
STABILIZER EXTENSION
29-1/4”
40 seconds
POWER SOURCE
Integral-mounted hydraulic pump and PTO application. Other standard power sources may be
utilized-minimum power required is 21 horsepower.
CYLINDER HOLDING VALVES
The holding sides of all cylinders are equipped with integral-mounted holding or counter-balance
valves to prevent sudden cylinder collapse in case of hose or other hydraulic failure. The
stabilizer cylinders have positive, pilot-operated holding valves that open only on command.
The inner cylinders have single pilot-operated counter balance valves while the outer and
extension boom cylinders have double counter-balance valves. The counter-balance valve
serves several functions. First, it is a holding valve. Secondly, it is so constructed that it will
control the lowering function and allow that motion to be feathered while under load. Finally, if a
hose breaks, the only oil loss will be that in the hose.
ROTATION SYSTEM
Rotation of the crane is accomplished through a turntable bearing, powered by a high torque
hydraulic motor through a ring and pinion type spur gear train. Total gear reduction is 56.7 : 1.
HYDRAULIC SYSTEM (PTO DRIVEN)
The hydraulic system is an open-centered, full-pressure system that requires 13 GPM optimum
oil flow at 2300 PSI. Eight-spool, stack-type control valve, six of which are used for the standard
crane and the remaining two are plugged, but easily adapted for additional optional features.
Dual operational handles for six functions are located at both sides of the crane for convenient
operation. System includes hydraulic oil reservoir, suction-line strainer, pump, 8-section control
valve, return-line filter and all hoses and fittings.
STABILIZER DIMENSIONS
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