OO-C-2763
nominal groove diameter shall not exceed the nominal diameter of the wire rope
furnished by more than one-tenth inch. Steel sheaves shall be furnished.
3.10.7 Hydraulic systern. The hydraulic system shall include 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. The pump(s) shall be driven by the crane engine and
shall have sufficient capacity to operate all hydraulically powered components
as specified herein. Means shall be provided in the hydraulic system for
bleeding all air trapped in the system. All rods, which will be exposed during
operation, shall have a hard chromium plating. All pressure hydraulic hoses and
fittings shall be capable of withstanding a minimum burst pressure of four
times the maximum operating pressure, and a proof pressure of at least two times
the maximum operating pressure.
3.10.8 Load moment device. A load indicating and warning device of the load
moment type shall perform the following functions while on outriggers.
Provide a dial or digital reading of hook load in pounds.
Provide a dial or digital reading of radius in feet.
c.
provide a dial reading of load moment as a percentage of rated
capacity.
d.
Provide a visual warning (amber light) when load moment reaches 90
percent of capacity and visual (red light) an audible warning at 100
percent of capacity.
e.
Provide function kickout (load may be lowered but not raised) when
load moment reaches 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, J375, and J376.
3.11 Cabs. The cabs shall be fabricated from sheet steel or fiberglass,
having sufficient windows and glazed doors to permit at least 270 degree vision
for the driver or operator in normal position. All glass shall be safety type,
and held in place by rubber or metal channels for easy replacement. Windows
shall be arranged for easy-opening and removal when required. All cab doors,
whether of the sliding or swinging type, shall be adequately restrained from
accidentally opening or closing when the crane is traveling or operating. All
doors shall be provided with means for securely locking in the closed position.
Adjustable and comfortable seats shall be provided in each cab and located for
maximum unobstructed visibility of the operator. Both cabs shall be equipped
with diesel and or hot water heater, defroster, and air or electric operated
wind shield wiper. Electric or air horn, hand or foot operated, shall be
provided in both cabs. A positive swing lock for traveling shall be provided.
The carrier cab shall be provided with West Coast type outside rearview mirrors
on each side.
3.12 Controls. All hoist, and crane controls, lockouts, and indicators
shall be located within easy reach of the operator in the crane cab, and shall
be readily accessible under all conditions of operation. All controls shall be
clearly marked as to the use and function.
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