Item 2 5-7YDSS.doc

5-7 YARD STAINLESS STEEL - TWO WAY BODY & INTEGRAL SPINNER

Item 2

5-7 YARD STAINLESS STEEL - TWO WAY BODY & INTEGRAL SPINNER

Length: 10 ft.

1. BODY

_____ 1.1 Designed and constructed for extreme service, unibody construction with no exposed structural or longitudinal cross members.

_____ 1.2 Shall be designed for use as a conventional dump body and with the body tilted forward as a sand and chloride spreader for either right or left hand operation as needed and requested.

_____ 1.3 Approximately 7' inside width.

_____ 1.4 Approximately 24" sides.

_____ 1.5 Approximately 5 cubic yard capacity without sideboards.

_____ 1.6 Body shall be fabricated of 10 gauge grade 304 stainless steel.

_____ 1.7 Floor shall be 1/4” grade 304 stainless steel full welded to the body headboard and walls.

_____ 1.8 Boxed corner posts constructed of stainless material.

_____ 1.9 Full welded construction throughout.

_____ 1.10 Longitudinal formed of 10”x2”x1/4" wall SS steel tubing.

_____ 1.11 Two formed cross members shall be positioned to provide lateral and side support and shall be constructed of stainless material.

_____ 1.12 Fixed, solid, headwall; sloped headwall will not be accepted.

_____ 1.13 Change of body from spreader to conventional dump body shall be done easily, quickly, and manually by one person.

_____ 1.14 Tailgate shall be double acting with self-aligning (tapered) upper hinge pins.

_____ 1.15 Body must be equipped with an adequately braced ladder mounted on the right side whose first step is 21" above the ground and extends to top of the sideboards. The right hand side of the ladder must terminate in a grab handle 8” above the sideboard.

_____ 1.16 10' body with 12" overhang after body pivot.

_____ 1.17 10' minimum inside body length.

_____ 1.18 Mud flaps fore and aft of rear wheels.

_____ 1.19 One gusseted step must be provided on the inside of the body adjacent to ladder on the ditch side of the vehicle.

_____ 1.20 Body longitudinals must have 1” diameter moisture vent holes at the front, center and rear.

_____ 1.21 Continuous welding inside and out.

_____ 1.22 Grade 70 rated tailgate chains with upper and lower eyes.

_____ 1.23 Sloping tailgate braces and body sills.

_____ 1.24 Full width rear apron under tailgate 12” wide bolted on and easily removable.

_____ 1.25 All body pins must be capable of being easily lubricated through grease fittings.

_____ 1.26 Tailgate trip shall be air operated with control valve mounted by Fleet Services.

_____ 1.27 One gusseted step must be provided on the inside of the body adjacent to ladder on the ditch side of the vehicle.

2. CROSS CONVEYOR

_____ 2.1 Hydraulically operated, located directly behind head wall of body.

_____ 2.2 Conveyor drive system shall be a Superior gearbox with direct mounted White hydraulic motor. This drive motor will have a built-in 50-pulse sensor. The motor/gearbox will be totally enclosed and equipped with sealed bearings running in oil, the gear box shall be mounted such that the input shaft is located on the lower side of the gear box.

_____ 2.3 The largest possible door opening shall be provided at either end of cross chain to provide access for cleaning and service. A material adjustment gate must be easily removable to facilitate cleaning and clearing of obstructions.

_____ 2.4 A wear plate shall be tack welded under entire length of upper half of conveyor chain to protect body floor.

_____ 2.5 Bolted on stainless steel “dog house” cover mounted inside body on the discharge side to prevent material from leaking out.

_____ 2.6 Stainless steel plate shall be welded on the non-discharging side to prevent excess material from escaping.

_____ 2.7 Discharge gate shall be easily adjustable to regulate flow of material.

_____ 2.8 Cross conveyor pintle chain must have D667X links minimum with tensile strength of 21,000.

_____ 2.9 Cross conveyor discharge opening must be 7" x 10" minimum.

_____ 2.10 Cross conveyor must be shielded to prevent material buildup on battery boxes, air dryers, valve control boxes, etc., while in operation and while stopped.

_____ 2.11 Cross conveyor shall be level with floor across the entire width of the body to facilitate material flow.

_____ 2.12 Easily replaceable steel rollers of approximately 2 1/2” diameter must be installed fore and aft of cross conveyor shield with nylon bearings. Fit between nylon bearings and 3/4” diameter roller shaft must be loose (approx. 3/16” clearance) to prevent seizure. Roller shaft must also be a loose fit in the roller shaft bracket or hangers so it will also spin.

_____ 2.13 This unit shall be available with right and/or left hand discharge and spinner if requested.

_____ 2.14 The cross conveyor must have an easily removable cover for off season usage.

3. SPINNER

_____ 3.1 Hydraulic operated.

_____ 3.2 Mounted on body hoist sub frame directly forward of rear wheels to provide traction to the vehicle as well as evenly covering two traffic lanes. Left hand or right hand mounting as required.

_____ 3.3 Material being discharged by body conveyor will feed to spinner assembly by means of chute constructed of 304 grade stainless steel.

_____ 3.4 Poly disk minimum 18" diameter with 6 vanes.

_____ 3.5 Adjustable chute.

_____ 3.6 An adjustable deflector must be provided to prevent material from striking oncoming traffic and to prevent material from being discharged into the brake and rear-axle area.

4. HOIST AND SUBFRAME

_____ 4.1 Class 60 NTEA rated.

_____ 4.2 Rear capacity, 17 ton minimum.

_____ 4.3 Forward capacity, 14 tons minimum.

_____ 4.4 Dump angle approximately 48° rear.

_____ 4.5 Dump angle approximately 35° forward.

_____ 4.6 Double arm type. Type 5 underbody arm lift.

_____ 4.7 Power down with a hydraulic relief set at 500 PSI.

_____ 4.8 Operational unit must be capable of easily lifting 7 yards of sand/salt mixture in front dump mode. (approximately 1,000 PSI required).

_____ 4.9 Subframe must be professionally bolted to truck chassis using grade 8 fastening hardware, welding is not acceptable.

_____ 4.10 The body shall pivot forward and rearward on 2” outside diameter stress proof rods x 43.5” in length. These rods shall be mounted in free rotation pivots.

_____ 4.11 The pivot axles shall rotate in four 1” thick base ears which are welded at each end of the rigid subframe. This design provides a double shear hinge assembly that develops 2” of bearing area to match the 2” outside diameter pivot rods. The pivot axles rotate in steel bearing blocks which are welded to the body longsills. These bearing blocks are flame cut from 2-1/2” thick plate x 5” wide and 10” long. Said bearing blocks shall be greaseable and shall have a circumferential internal grease groove to distribute lubricant to the pivot axle bearing surface.

_____ 4.12 The body hoist apparatus shall consist of a center pivot assembly (bellcrank) pivoting in the subframe and activated by a double acting 8” bore (inside diameter) by 21” stroke hydraulic cylinder. The cylinder shall have a 2-1/4” outside diameter rod, double nitrided for corrosion protection. The axle pins (which retain the cylinder) at both the rod end connection to the center pivot and at the base end connection to the sub-frame cross member shall be 2-1/4” outside diameter stress proof pins by 7-1/4” long.

_____ 4.13 The center pivot (bellcrank) shall be connected to the body hoist basket by two lift arms pivoting on both ends on 1-3/4” outside diameter stress proof axle pins by 6-3/4” long. There shall be grease fittings at both pivot points.

_____ 4.14 The lift arms shall be one piece flame cut 3”x 3” thick steel plate by 24” long. The center pivot assembly shall rotate on a 2-1/4 outside diameter by 38-1/2” long stress proof main axle extending through the sub frame long sills and carrying the body safety props. The above axle shall be bolted to a 5/16” thick x 6” high formed C sub-frame long sill to prevent rotation of the axle in the sub-frame.

_____ 4.15 There shall be two pivot bushings welded to the center pivot assembly with 21 square inches of bearing area each on the main axle, each bushing shall be 3-1/4” outside diameter by 3” long seamless mechanical tube with a 1/2” wall thickness and shall have grease fittings. The pivot bushings shall penetrate through the 1/2” thick end plate of the center pivot assembly by ½ of their length to provide a mechanical restraint in addition to the weldment.

_____ 4.16 The center pivot shall be a fabricated welded structure consisting of a main cross member or 6” x 6” x 1/2” wall thickness hollow structural tubing of 50,000 tensile steel, to which shall be welded two plates of 3/4” thick x 15-1/4” x 26-3/4” flame cut 44,000 tensile steel plate carrying the hoist cylinder rod end pivot axle and the inner end of the lift arm pivot pin, two plates of 1/2” x 7”x 27-1/4” flame cut 44,000 tensile steel carrying the outer end of the lift arm pivot axle, the main pivot bushings and 3/8” thick plate gussets to reinforce this structure. The entire center pivot assembly shall be welded in a continuous method with 3/8” bead size fillet welds meeting E-70XX welding code.

_____ 4.17 Wherever possible pivot axles shall be retained by 1/2” diameter x Grade 8 hex head cap screws in double shear with self looking nuts.

5. GENERAL

_____ 5.1 Body must have support, permanently attached, capable of being locked in place, for both forward and rear dump conditions.

_____ 5.2 Parts and repair manuals as needed.

_____ 5.3 Sloping tailgate braces and running boards.

_____ 5.4 Boxed side braces.

_____ 5.5 Cab protector not required.

_____ 5.6 Wide 12” apron, full width of body angled to prevent buildup of material that will prevent closing of gate.

_____ 5.7 Note: CA dimension will accommodate not only body but wing tower and hydraulic assembly for plows.

_____ 5.8 All wiring must be protected by wire loom or conduit.

_____ 5.9 Soldered connections and heat shrink wrap must be used on all wiring.

_____ 5.10 Hardwood sideboards of wood, 6” x 2” thickness minimum and height of the sideboard pocket must be supplied and installed by vendor and painted black in color.

_____ 5.11 Two steel aerodynamic double light housings will be supplied by MaineDOT to be fully welded to the exterior of both the left and right rear post. The box will be mounted in the center of the frame. Adequate holes must be provided through the frame and box to facilitate the installation of wires and connectors for lights.

APP/kad

12/13/11 d:5-7ydss.doc

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