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6A .A. - Page 19 CITY AND COUNTY OF SAN FFZANCISCO L1 /�) RQSF'.11000009 ITSF11000582 /CD <oci r p ry, EQUIPMENT SPECIFICATION FOR DIESEL POWERED 7.3 CUBIC YAIRD VOLUMETRIC CAPACITY MUNICIPAL STREET SWEEPER SPECIFICATIONS (WITH DUAL GUTTER BROOMS & DUAL STrE RIW I) 7rr,•' REVISION DATE 04101/11 dpw ` 368 Separation of the dirt and refuse from the air stream shall be accomplished within the - 369 hopper by means of a multi -pass cylindrical centrifugal single chamber dust separator with a 370 minimum size of 20" diameter and 61 "width with two (2) skimmer slots to efficiently 371 separate dirt. The separator shall be designed so that it will not plug with normally 372 encountered debris. 373 eiUS The dust separator shall have a minimum 24" x 61" curved, easy to open door allowing 374 . inspection and cleaning of the interior. The door shall have an abrasion resistant bonded 375 rubber lining material for long life. 376 _The entire dust separator inlet area shall be lined with a bolt -in replaceable, wear resistant 377 rubber liner for long life. 378 � ,r' A 61" x 84" steel screen of not less than 13 gauge shall be provided to allow air to move 379 freely from the hopper into the centrifugal dust separator. 380 WXJLFiltors and baffles not acceptable due to increased cost of replacement and cleaning. 381 The dust separator door shall be opened frorn outside the unit via a handle with a heavy 4 2 duty stainless steel cable with stainless steel wear cover installed to protect the paint. 385 HOPPER: .386 4SY Hopper size shall be approximately seven and three tenths (7.3) cubic yard volumetric 387 i measurement with an operating load capacity of not less than 6 cubic yards. 388 9 _DUrnping shall be accomplished by rneans of hydraulically actuated cylinders attached to a 389 rear door which shall have a minimum opening of 84" x 44" with a raker bar moving inside 390 hopper as door is opened and closed to dump debris behind the rear wheels. 391 Hydraulic cylinder movement shall be controlled with the use of an electric toggle switch 392 located on-the side of the hopper so discharging of debris may be viewed during dumping 393 for maximum safety. 394 &Fs The hopper floor shall have a minimum of 22 degree slope. 395 - Hopper door shall be opened and closed hydraulically and be held in the closed position by 396 means of a lock valve located in the hydraulic dump circuit. 397 Yef A x 29" inspection door shall be provided on both left and right side of the hopper for 398 easy viewing inside hopper and insertion of large debris. 399 9fif Hopper shall be maintained airtight through use of rubber seals on all doors and openings. 400 9�___ lopper suction inlet roof area shall have a bolt on replaceable wear resistant liner 401 3/8" x 11" x 10'. f 402 Abrasion protection package shall be furnished with the standard hopper screen; protective 403 hopper wall liners; suction nozzle liner; pressure wear pads; heavy duty pressure hose (in 404 lieu of standard pressure hose). 405 l 5Lf Hopper deluge system with high volume nozzles which attach to a fire hydrant to flush the 406 hopper shall be furnished and shall include quick disconnect fittings on nozzle and filler 407 hose. 408 Aga _Hopper drain system shall be mounted on lower right panel of dump door; screen assembly 409 hinges for easy cleaning on the inside of hopper. (':\ Usc: cm" r: ui�. 1 pprla l: dl, c": 1lCl' e" qd" ulcxllrall; l;(' rgccl11101111Q ).)01110SCS'r1AWOD1cwr6w - vm -1Ltl"c Page 10 Of 20