ASME B30.25:2003 pdf free download

ASME B30.25:2003 pdf free download.SCRAP AND ATERIAL HANIDLERS.
25-1.2.3 MinImum Backward Stability Conditions With Front Removed
With the conditions as stated in pars. 25-1.11, but with the front removed, the following shall be the minimum acceptable backward stability conditions
(a) For crawler handlers, the horizontal distance from the center of gravity of the entire handler, less the front. to the axis of rotation shall not exceed 90% of the horizontal distance from the axis of rotation to the backward tippEng axis En the least stable position.
(b) For wheel- and rail-mounted handlers, with the bngitudinal axis of the upper-structure less the front perpendicular to the longitudinal axis of the carrier, the total load on all wheels on the side of the base supporting the least load shall not be less than 5% of the total weight of the handler
SECTION 25-1.3: SWiNG MECHANISM
25.1.3.1 SwIng Control
The swing mechanism shah start and stop with con- tolled acceleration and deceleration. The swing mechanism shall meet the requirements of SAE 12393 for minimum performance and rating procedures. Use of the swing brake or reversing the control lever to achieve this criteria is acceptable if itis a normal operating procedure recommended by th manufacturer
25-1.32 SwIng Brakiag Means and Locking Desice
(a) All handlers shall have a swing brake capable of bringing the upper structure to a complete stop as specified in SAE J2393. The manufacturer and/or assembler/ modifier shall verify the swing brake meets the specifications set forth In SAE J93.
(b) Means shah be provided to prevent the rotation of the upper structure during transport. This can be accomplished by a swing lock or swing brake.
(c) If the handler is not equipped with a swing lock. the swing brake shall be applied automatically when the engine stops.
SECTiON 25-1.4: HANDLER TRAWl.
25-1.4.1 Travel Mechanism
(a) On rail-mounted handlers, when the travel mechanism must be temporarily deactivated in the normal course of the handler’s use, provision shall be made to disengage the travel mechanism from the cab or outside the handler body.
(b) On crawler-mounted handlers, travel performance shall be calculated arid specified according to SAE 11309.