8 Model 5525-6025-6625 Parts & Specifications Manual Part # 99904215
PERFORMANCE CHARACTERISTICS
-5° to +78° (-0.09 to +1.31 rad)
11 seconds to raise
13 seconds to lower
78" & 78" (198.1 cm & 198.1
cm)
23 seconds to extend
32 seconds to retract
PLANETARY GEAR LINE
SPEED
55 feet per minute (2nd wrap)
System Specifications
POWER SOURCE
PTO DRIVEN - Integral mounted hydraulic pump and PTO application. Other standard power
sources may be used. Minimum power required is 23.5 horsepower based on 10 GPM (37.9
liters/min) at 3,000 PSI (207 bar).
CYLINDER HOLDING VALVES
The base ends (extend sides) of the lower boom and extension cylinders are equipped with
integral-mounted counterbalance valves to prevent sudden cylinder collapse in case of hose or
other hydraulic failure. The extend side of the lower boom cylinder is equipped with a 10 gpm
counterbalance valve. The counterbalance valve serves several functions; first, it is a holding
valve. Secondly, it is designed to control the speed at which the lowering function operates and
allows that motion to be metered under load. Finally, it prevents the loss of an excess amount of
oil in the event of a hose failure. Only the oil in the hose at the time of the failure will be lost.
ROTATION SYSTEM
Turntable bearing with external tooth worm gear powered with a high-torque hydraulic motor.
Standard rotation is 420º.
HYDRAULIC SYSTEM (PTO DRIVEN)
The hydraulic system is an open-centered, full-pressure system that requires 10 GPM (37.85
liters/min.) optimum oil flow at 3000 psi (207 bar). It is equipped with a four-section, stack-type,
electric, remote control valve. The system includes a separate hydraulic oil reservoir, suction
line filter, and return-line filter.
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