252-60-27 Plow Single Ext Discharge.docx

State of Illinois Department of Transportation Bureau of Business Services

Specifications and Questionnaire for a High-Moldboard Trip Type, Reversible, Snowplow with Extended Discharge

July 2022

This specification and questionnaire covers a high-moldboard type, with extended discharge, reversible, full trip snowplow for use on single and tandem axle trucks operated by the Department of Transportation.

It is the responsibility of each bidder to complete and return this questionnaire with the bid.

Bidders are advised to carefully read these specifications.

Proposed With This Bid:

Note: Single numbers in italics and parenthesis correspond to the numbers on the attached photographs to provide a common definition of terms and parts.

Do not scale from photographs.

Description of Construction:

The snowplow assembly shall be constructed using U.S. Domestic steel. A copy of Certification of Compliance shall be included with snowplows delivered to each location. The Certification shall verify the steel origin and tensile strength.

Complies: |_| Yes |_| No Welding shall conform to Certified AWS standards and practices. All seams and joints will be 100% welded. All pins and hardware with the exception of the cutting edge hardware shall be zinc plated.

Complies: |_| Yes |_| No Note: If the equipment proposed exceeds the minimums called for in the specification please do not mark NO. Mark Yes and explain with a short comment on how it exceeds.

Moldboard (1):

Note: Length to be called for in the Bid - 12’0”.

Height at left side of the plow shall be a minimum of 39” and shall maintain this height for 72” of the moldboard. The remaining 72” shall taper from 39” to the final discharge height of 57” at the far right hand of the plow. These points are measured from the bottom of the cutting edge to the highest inside point of the moldboard.

Note: The intake and discharge taper measurement will depend on the length of moldboard called for in the order.

Length of cutting edge as specified by plow length in bid. The blade shall be minimum 1/2” thick x 8” high, using AASHTO standard punching. The bottom angle shall be punched to accept carbide and standard steel cutting edges.

Complies: |_| Yes |_| No Note: In addition to the standard AASHTO standard punching the lower moldboard angle shall be punched to accept Segmented type blades (i.e. Polar Flex) without the use of adapters. The moldboard angle shall have integrated, or welded steel block stops to support the segment blade outer mounting bracket. IDOT is aware the lower moldboard angle gusset locations may have to be altered to provide additional punching. Final design and drawings will be reviewed with IDOT.

Complies: |_| Yes |_| No A 3/16” steel moldboard shall be welded to the vertical ribs. Welds shall be full and continuous on both sides of the ribs, including all reinforcing and at the bottom angle.

Complies: |_| Yes |_| No The top of the moldboard shall be reinforced with a 2” x 3” x 3/8” structural angle (3). The top angle shall have pre-punched holes for attaching the rubber snow shield.

Vertical ribs (2) shall be 1/2" wide, cut as a single piece. Splicing of pieces to form the rib is not acceptable. The base of the rib shall be as wide as the bottom angle. The radius of the rib must be uninterrupted.

Complies: |_| Yes |_| No Minimum of 9 ribs per plow.

The four center ribs (six center ribs for a 12’ plow) at the bottom angle shall be reinforced (7) to provide a 1-1/2" bearing thickness for connection at the push frame lugs.

Complies: |_| Yes |_| No Steel reinforcing plates, 1/2” thick, shall be welded to each side of the rib, moldboard and the bottom angle. They shall extend above the center of the pin a minimum of 7”. The reinforcement plates shall be the full width of the rib with the top of the plate(s) cut at an angle to the bottom angle.

Complies: |_| Yes |_| No The ribs shall be placed as follows: One at each outer edge of the moldboard and the remaining ribs spaced at 14 ½”, 29”, 58”, and 72” from each end of the moldboard. The left and right outer ribs shall have two integral .375 x .750 slotted holes for marker installation.

Complies: |_| Yes |_| No Note: The rib spacing may vary depending on the length of the moldboard called for in the order.

Horizontal Ribs (4): Two rows 3” x 3” x ¼” structural angles, shall be evenly placed horizontally between ribs 1, 2, 3, 7, 8, & 9. Two 3” x 3” x ¼” structural angles shall be evenly spaced horizontally between ribs 4, 5 & 6. Two 3” x 3” x ½” structural angles that are boxed with ¼” plate, shall be evenly spaced horizontally and vertically between ribs 3 & 4 and 6 & 7. These ½” boxed angles shall anchor the ¾” plate top spring mounts.

Complies: |_| Yes |_| No Moldboard bottom angle (13) shall be 4" x 4" x 3/4" structural angle.

Moldboard bottom angle shall be reinforced (12) every 12” between bolt holes and at each end of the bottom angle with ½” stock welded in place, bottom angle shall also be boxed between each rib and 100% welded.

Complies: |_| Yes |_| No Moldboard radii shall include the deflector shield and a 12” deflector of rubber belting bolted through a continuous 3/16" x 1-1/2" flat with extended tabs at each bolt hole held by the top structural angle. The rubber deflector shall be a minimum 3/8” thick and 12” in width the full length of the moldboard.

Complies: |_| Yes |_| No

The moldboard and deflector shall be conducive to carrying large volumes of snow and affording protection from snow and spray carrying onto the windshield.

Complies: |_| Yes |_| No The moldboard, including integral shield, when the cutting edge is at a 7 degree attack angle, shall measure 25-1/4” from the blade to a line dropped from the corner of the shield angle.

The push tube shall be connected to the four reinforced vertical ribs (six ribs on the 12’ plow), using 1-1/4" pins and attached to a 4” x 4” x 3/8” tubular structural member.

Complies: |_| Yes |_| No

Pin Size:

The pins shall have large, thick flat heads and machined for roll pins. They shall be installed with a machine washer on the pinned end.

Complies: |_| Yes |_| No The moldboard shall include two orange LED lighted markers (6) mounted at the forward outermost corners of the snowplow. The markers shall be a minimum 30" to maximum 36” tall x 3/4" diameter. Wiring shall be continuous, outer fiber or plastic sheathing for protection and securely fastened to the moldboard. Allowing for full trip of the moldboard, wiring shall terminate at plow hitch with Weather pack type connection including female portion for installation on truck at later time.

Component:

Trip Mechanism:

Compression Spring Trip:

The compression spring trip shall consist of two (2) springs with mechanical slides inside, mounted on an angle iron frame (enclosed cannon types will not be considered).

Complies: |_| Yes |_| No The springs shall be constructed of AISI 5160H steel, and a bar diameter of 23/32”. The OD of the spring shall be 5-5/16” with a solid capacity of 4234# and a compression rating of 319# per inch. There shall be a total of 14 coils in each spring. There shall be a total of 14 coils in each spring. Each spring shall be approximately 6” in outer diameter, 23-½” long of ¾” wire.

The angle of attack shall be easily adjustable by pins and at least three (3) adjustments.

Complies: |_| Yes |_| No The Moldboard shall reset to upright position after passing over obstacle.

Complies: |_| Yes |_| No Note: This is the only trip mechanism acceptable to the Illinois Department of Transportation. Substitution will result in disqualification of the bid. Alternatives will be considered and evaluated outside of the time frame of this bid. Successful alternatives would be included in future bidding should they prove to be a safe and functional alternative.

Push Frame:

The push fame shall be manufactured of structural members of properly reinforced steel. The semi-circle shall be formed from 3-1/2” x 3-1/2” x ½” structural angle reinforced with additional ½” angles and plate. The “A” frame is to be constructed with 4” x 13.8 lb. ship and car channel, 5/8” plate, 1” plate and reinforced with ½” plate. The “A” shall pivot on a captured 1-1/4” stress proof pin. The pin will rotate within a 2-1/4” OD x 3-3/4” long tube that is relubable and has an internal grease swirl. The frame shall be connected to the four reinforced vertical ribs (six ribs on the 12’ plow), using 1-1/4" pins and attached to a 4” x 4” x 3/8” tubular structural member.

Complies: |_| Yes |_| No The push frame shall hydraulically adjust the plowing angle of the moldboard 35o right to 35o left and hold the plowing position without the use of a mechanical device.

Reversing mechanism:

The unit shall consist of two double-acting, hydraulic cylinders (10) and constructed so that the reversing cylinders are mounted above the push frame in such a manner as to not interfere with the complete tripping of the moldboard. Cylinders shall attach to the push frame – “A” frame assembly with brackets made of 5/8” A572 steel. The 1” stress proof cylinder pins and or cylinders, shall be easily removed or replaced without disassembling the plow.

Complies: |_| Yes |_| No The cylinders shall incorporate a 3" diameter piston and 2" diameter nitride plated rod.

The cylinder piston shall use a molded glass filled nylon wear ring with a capped T-seal and nitrate static seal O-ring . The threaded head gland shall have polypak type B seal along with a Nitrite back-up ring, static seal nitrite O-ring, and a D520 Hythane rod wiper. The ports shall have .750-16 ORB work ports.

The circle A-frame stops (11) shall be located to allow the 35 right and left angle without fully extending or contracting the hydraulic cylinders.

Complies: |_| Yes |_| No Heavy, hard rubber stops shall be placed on the bottom of the front end of the push frame to prevent the tripped moldboard or blade from contacting the push frame.

Complies: |_| Yes |_| No Hydraulic hoses shall be ½” and rated for a 3,000 lbs. working pressure rating. The whip hoses provided shall be 40” minimum in length. All hoses provided to connect to the truck shall be located on the driver’s side of the push frame of the plow. Note: Docking plate for multi-coupler shall be included for hose storage.

Hoses shall be properly sheathed at sharp corners and routed to avoid pinching and cutting.

Complies: |_| Yes |_| No The oscillating A-frame channel shall be a 7" MC Ship and Car channel weighing 22.7 lb/ft.

The ends of the oscillating channel shall be equipped with reinforced angles (9) to prevent distortion of the oscillating plate and support the 1-1/2" diameter, Grade 8, oscillating bolt.

Complies: |_| Yes |_| No The oscillating channel shall have 1" thick push lugs to connect to truck push frame 30-1/2" center to center, drilled to accept 1-1/4" pins.

Complies: |_| Yes |_| No It shall be the responsibility of the manufacturer to ensure that the plow can be raised without contacting truck fenders or other interference.

Complies: |_| Yes |_| No The push frame, moldboard assembly shall be equipped with proof-coil level lift chain pick assembly to lift and carry the plow supplied to the push frame of an IDOT dump truck.

Attached to the Push Frame immediately behind the pivot bolt, shall be a plate welded to either channel. A “top wind” style screw jack shall be mounted on a detachable collar and attached to the plate. The screw jack shall be removable without the use of tools. The jack shall be rated for 3,500 lbs. The jack, mounting and mounting location will be subject to review during pilot model inspection.

Component:

Finish:

Prior to assembly and powder coating, all exterior steel surfaces including the outer face of the steel moldboard, shall be shot blasted to a Grade 25 finish to properly clean the surface of all mill scale, oil, rust, or foreign material.

Complies: |_| Yes |_| No The metal shall be properly treated after shot blasting to provide a proper surface for application of the powder coat finish.

Complies: |_| Yes |_| No Prior to assembly of the plow structure the front and rear face of the moldboard shall be powder coated flat back.

Complies: |_| Yes |_| No Inspection:

The Department of Transportation reserves the right to inspect plows at a manufacturer's plant or have a pilot model shipped for inspection to one of the delivery destinations prior to delivery of the remaining order of the various destinations. When inspection is not made at manufacturer's location, equipment shall be shipped subject to inspection and acceptance at a chosen destination.

Complies: |_| Yes |_| No General:

One (1) copy of the operator's manual, parts list, and warranty shall be provided to each IDOT location ordering a plow.

Complies: |_| Yes |_| No Three (3) copies of all operator's manuals, parts lists, and warranty information shall be provided at time of delivery to each district receiving one or more units.

Complies: |_| Yes |_| No Requirements Covering Items Detailed Above:

All equipment cataloged as standard or safety related shall be furnished and in place and shall be included in the purchase price of the unit. Any parts, standard tools, and/or accessories not specifically called for but required for proper operation shall be provided.

Complies: |_| Yes |_| No

The component parts of the unit shall be of proper size and design to safely withstand maximum stresses imposed by a capacity load, and the manufacturer's rated loads for chains and bearings shall not be exceeded when the unit is loaded with such loads.

Complies: |_| Yes |_| No Standard tool kits (if required) shall be supplied.

Full coverage warranty for a minimum 12 months shall be provided. Bidder shall attach copy of warranty with the bid. Since the continuous operation of this equipment is of the utmost importance and sometimes of an emergency nature, it is necessary that the successful bidder be in a position to render prompt parts and service.

The vendor shall notify the delivery location 24 hours prior to delivery. Delivery shall be made by truck to the locations shown on the order. The type of truck or trailer used for delivery shall be such that unloading can be accomplished by tractor-loader or truck wreckers. Trucks which cannot utilize this type of unloading system shall be responsible for unloading the truck.

Complies: |_| Yes |_| No This equipment is to be delivered in first-class operating condition with acceptance subject to Department of Transportation inspection and approval.

Bid Response:

Bidders should send copies of each of the following with their bid response.

a) Specification Questionnaire

b) Descriptive Literature

Specification No. 252-60-27

Specification No. 252-60-27

Specifications and Questionnaire for a High-Moldboard Trip Type, Reversible, Snowplow with Extended Discharge image2.png image3.png image4.png image1.png