OO-C-2774
3.9.5 Sheaves. All sheaves and sheave sizes shall be in accordance with
ANSI B30.5 recommendation. Non-metallic sheaves shall not be furnished.
3.9.6 Hydraulic system. The hydraulic system shall include a pump(s),
hydraulic rams, rods, full flow filter, reservoir, pressure relief valve, and
all necessary lines, lockouts, restrictor, and control valves to insure positive
control of boom hoist. and rope hoist in all operations or loss of hydraulic
power due to ruptured hoses. Hydraulic line circuit and filtration shall be in
accordance with SAE J931 with a 25 micron filter. The pump(s) shall be driven
by the crane engine and shall have sufficient capacity to operate hydraulically
powered components as specified herein. Means shall be provided in the
hydraulic system for bleeding all air trapped in the system. All high pressure
hydraulic hoses and fittings shall be capable of withstanding a bursting test
pressure of four times the working pressure, and a minimum proof pressure of at
least two times the operating pressure.
3.9.7 Boom length and boom angl e indicators. A dial or digital display of
boom length and load radius in feet shall be provided in the cab in view of the
operator in his normal operating position. The system(s) shall comply with SAE
.
Jl180 and SAE J375.
3.9.8 Auxiliary winch. When specified (see 6.1), an auxiliary winch, of
specified size, capacity and attachments shall be provided.
3.9.9 Piledriving systern. When specified (see 6.1), the crane shall be
fitted for operating a diesel hammer piledriving system. The crane boom point
will be provided with a lead adapter to be used with commercial standard 20-inch
series box type pile driver leads. The superstructure shall be fitted with
catwalk pivot connections. The catwalk pivot connections shall allow the use of
a standard catwalk of the same manufacturer as the pile driver leads.
3.9.10 Load Moment Device. When specified, a load indicating and warning
device of the load moment type shall be provided to perform the following
functions while on outriggers:
Load indicating and warning device shall provide function kick-out
a.
when load moment exceeds 100 percent of rated capacity. Function
kick-out shall block the operator's control of the boom down, boom
extension, and boom hoist functions. When in the kick-out mode,
the operator shall retain control of the boom up, boom retraction,
and load lowering functions.
b.
Provide a dial or digital reading of hook load in pounds.
c.
Provide a dial or digital reading of radius in feet.
Provide a dial reading of load moment as a percentage of rated
d.
.
capacity.
e.
Provide a visual warning (amber light) when load moment reaches 90
percent of rated capacity and visual and audible (red light and
alarm) warning at 100 percent of rated capacity.
The device shall be capable of manually selecting parts of line and boom
length. The device shall conform to SAE J159 and J376.
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