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6.1.A. -Page 22 ,l r R CITY AND COUNTY OF SAN FRANCISCO `Q �/ C,25E11000009 I T SN110005821Cl) " z \ EQUIPMENT SPECIFICATION FOR DIESEL POWERED 7,3 CULTIC YARD VOLUIVI TRIC CAPACITY . ET SWEEPER SPECIFICATIONS `— M UNICIPAL STR �.ra4ro (WI I l4 DUAL GUTTER BROOMS 8, DUAL S'i'EERINO) REVISI DATE 04/01/11 dp%•l 451 fy 4' A 14'` diameter (minimum) pressure hose attached between pick -up head and blower 452 -7 housing shall be provided. 453 4 _rti' A bolt -on pressure inlet ring with turning vanes shall be provided for efficient performance 454 wand easy service. 455 A 14" diameter (minimum) suction hose, attached to a quick disconnect transition at the 456 hopper, shall extend down to the right side of the pick -up head and shall be attached to the 457 pick -up head suction nozzle ring which shall be constructed of 1/4" steel. 458 1W Suction hose shall have a minimum 3/8" wall construction for long life. 459 _ �_Pick -up head shall be equipped with 4" wide Double /Double adjustable side mounted 460 Integral alloy steel and carbide runners for maximum pick up ability and long life. Skid 461 runners to be warranted for 2 years /2,000 hours prorated. Runners shall be symmetrical for 462 optimum life. 463 4T Side plates shall have a minimum height adjustment of 4" at the blast orifice. 464 _14 Pick -up head shall be equipped with Pick -Up l lead Curtain Lifter option. 465 Pressure inlet ring shall be equipped with an adjustable pressure relief for optimum leaf and 466 light debris sweeping; control shall be mounted Inside cab. 467 -/ Because of safety and environmental concerns, the pick -up head reverse system shall be 468 capable of operating in both forward and reverse directions. 469 4 inspection door or easily removable cover shall be furnished on the left side of the pick 470 up head near the pressure hose to give easy access by hand to clean out the turning vanes. 471 1 .� 13olt -on drag link supports shall be furnished. 472 �• Hydraulic pick -up head front curtain lifter shall be provided to give the pick -up head the 473 ability to sweep a large volume of light debris such as leaves, grass, paper, etc. without 474 causing excessive debris accumulation at the pick -up head inlet. It shall be hydraulically 475 controlled with a single switch on the sweeper control panel within the cab of the truck. 476 477 GUTTER ER BROOM(S): 478 fsT_Dual gutter brooms shall be 43" minimum diameter, wire filled vertical digger type for 479 removing debris from gutter area. 480 G; Gutter brooms shall be hydraulic motor driven and shall be positioned laterally and vertically 481 by.one hydraulic cylinder. 482 4� Gutter broom down pressure shall be automatically adjusted to load by a pressure sensing 483 sequence valve inline with gutter broom torque motor. 484 9f Each gutter broom shall have adjustment for bristle contact pattern and wear. 485 _Each gutter broom shall have variable speed control. 486 Each gutter broom shall have lateral flexibility to swing rearward 15" when encountering the - 487 impact of an immovable object thus avoiding damage to the broom assembly. 488 §� Each gutter broom shall have a spring adjustment to.allow downward compensation for 489 bristle wear and shall be free.floating to'follow street contour. 490 4 gi , Cacti gutter broom shall be held in the up and transit position by use of an electric lock 491 valve attachment. Upward motion of gutter broom shall be regulated by an adjustable flow (': 5l' scr.: lrnuunu4lppflal u., anrr" yA"n 1es IIJ.e Ai qu• rw nunro) •2um MEN N W:001ml6nUUl.n1- ii.doe f'11gal2of ?.o