Attachment_No._3_Specs_and_Drawings.pdf

Attachment No. 3 Specifications No. 20-C0835

DELTA CROSS CHANNEL RADIAL GATE GEARS AND BEARING

HOUSINGS REPLACEMENT

1. General:

Two 60 by 30-foot radial gates are installed as flood gates in the Delta Cross Channel floodgate structure as shown on Drawing No. 214-D-16686. Two wire ropes are attached on each hoist drum. Each gate is equipped with two drums and drum gears are part of the gear trains (gear reduction units) as shown on Drawing No. 214-D-16801. The gear reduction units are driven by the electric motor as shown on Drawing No. 214-D-16800. The existing 41-inch PD spur gears and 56-inch PD drum and ring gears need to be replaced. All pillow block roller bearing assemblies (Included housings) also need to be replaced as shown on Drawing Nos. 214-D-16801 and -16804. Work is located at the Bureau of Reclamation Delta Cross Channel Radial Gate Structure at Walnut Grove, California, in Sacramento County as shown on Drawing No. 214-208- 14897.

2. Deliverables:

All replacement parts shall be new. Furnish component parts as indicated in the table below:

Parts No.

From parts list on Dwg 214-D- 16804

Description Drawing Nos. Material Quantity Furnish or Repair

1R 56-inch PD Drum and Ring Gear

214-D-16802 214-D-16804

Alloy steel 2 Furnish

1L 56-inch PD Drum and Ring Gear

214-D-16802 214-D-16804

Alloy steel 2 Furnish

5 41-inch PD Spur gear

214-D-16802 214-D-16804

Alloy steel 4 Furnish

21 Pillow block roller bearing and bearing housing

214-D-16801 214-D-16804

See paragraph below

4 Furnish

22 Pillow block roller bearing and bearing housing

214-D-16801 214-D-16804

See paragraph below

4 Furnish

23 Pillow block roller bearing and bearing housing

214-D-16801 214-D-16804

See paragraph below

4 Furnish

24 Pillow block roller bearing and hearing housing

214-D-16801 214-D-16804

See paragraph below

4 Furnish

Attachment No. 3 Specifications No. 20-C0835

25 Pillow block roller bearing and bearing housing

214-D-16801 214-D-16804

See paragraph below

4 Furnish

26 Pillow block roller bearing and bearing housing

214-D-16801 214-D-16804

See paragraph below

4 Furnish

The replaced part dimensions shown on drawings are not confirm, the Contractor needs to verify all dimension in the field. The Contractor shall deliver replacement parts to the Delta Cross Channel floodgate structure. The Government will install all replacement parts in to the gear reduction boxes.

56-inch PD drum and ring gears (Part Nos. 1R and 1L)—Each flood gate includes two set of drum and ring gears (one right side and one left side) as shown on Drawing Nos. 214-D-16800, -16801, and -16802. The right side and left side gears may not be identical or interchangeable, but they are symmetrical (right and left versions). Each new drum and ring gear will be fabricated from an ANSI 4340 Commercial heat treated forging ring that has a minimum of 28/32 RC Hardness, 128 ksi minimum yield strength, and 146 ksi maximum tensile strength.

The dimension of the drum and ring gear is shown on Drawing No. 214-D-16802. The Contractor shall submit material approval data used for fabrications to the Government for approval before any fabrication. The approval data shall be submitted to Bureau of Reclamation , MP-250 Attention to Arthur Jue, 2800 Cottage Way, Sacramento, CA 95825. Minimum information in the report shall include the following:

a. Chemical analysis.

b. Heat treatment, including temperatures for austenitizing and tempering, time at temperatures, and cooling medium employed for the heat treatment.

c. Results of tests for mechanical properties or hardness, or both, and

d. Results of tests of any required supplementary tests.

e. The Contractor shall provide satisfactory documentation to the Government according to the specifications with the delivery of parts.

f. The drum and ring gears may be rejected if report is not delivered with the new drum and ring gears.

41-inch PD spur gears (Part No. 5)—Each new spur gear will be fabricated from one piece of ASTM A572 Grade 50 alloy steel plate with a minimum of 23/26 RC Hardness, 15 ksi minimum yield strength, and 50 ksi maximum tensile strength . The dimension of the spur gear is shown on Drawing No. 214-D-16802. The Contractor shall submit material approval data used for

Attachment No. 3 Specifications No. 20-C0835 fabrication to the Government before any fabrication. The approval data shall be submitted to Bureau of Reclamation , MP-250 Attention to Arthur Jue, 2800 Cottage Way, Sacramento, CA 95825. Minimum information required in the report shall include the following:

a. Chemical analysis.

b. Heat treatment, including temperatures for austenitizing and tempering, time at temperatures, and cooling medium employed for the heat treatment.

c. Results of tests for mechanical properties or hardness, or both, and

d. Results of tests of any required supplementary tests.

e. The Contractor shall provide satisfactory documentation to the Government according to the specifications with the delivery of parts.

f. The spur gears may be rejected if report is not delivered with the new spur gears.

Pillow block roller bearing assemblies—The Contractor shall acquire pillow block roller bearing assemblies (included housings), SDAF 200 series from NSK Corporation (or equal) and deliver to the job site. The Contractor shall submit pillow block roller bearing assembly data to the Government for approval before any purchases. The approval data shall be submitted to Bureau of Reclamation, MP-250, Attention to Arthur Jue, 2800 Cottage Way, Sacramento, CA 95825. The existing pillow blocks are spherical roller bearing type, split steel bearing and spilt cast iron housing, with 4-bolt flange configurations as manufactured by:

NSK Company

4200 Goss Road

Ann Arbor, MI 48105

(734) 913-7500 or (888) 446-5675

Pillow block roller bearing assemblies: SDAF 200 series—Model SDAF 22220 (or equal) for Parts No. 21, 22, 23, and 26

Pillow block roller bearing assemblies: SDAF 200 series—Model SDAF 22222 (or equal) for Part No. 24

Pillow block roller bearing assemblies: SDAF 200 series—Model SDAF 22224 (or equal) for Part No. 25

3. Drawings: The following drawings are part of these specifications:

Location Map----------------------------------------------------------------------------- 214-208-14897

Attachment No. 3 Specifications No. 20-C0835

60’ X 30’ Radial Gate – General Installation--------------------------- --------------214-D-16686 60’ X 30’ Radial Gate – Assembly-------------------------------------------------------214-D-16800 60’ X 30’ Radial Gate – Drum Unit Assembly ----------------------------------------214-D-16801 60’ X 30’ Radial Gate – Drum and Ring Gear-Shafting-Spur Gear --------------214-D-16802 60’ X 30’ Radial Gate – Drum Unit Base and Cover---------------- ----------------214-D-16803 60’ X 30’ Radial Gate – Base-Ropes and List of Parts---------------- --------------214-D-16804

4. Material and Workmanship:

All material used for the replacement shall be selected as the best available for the purpose for which used, considering strength, ductility, durability, and best engineering practice. All the fabrication shall follow the best modern manufacturing. All work shall be done by mechanics skilled in their various trades.

5. Surface Roughness and Finish:

The surfaces of parts where the roughness is specified on the drawings shall conform to surface quality specified in “Surface Texture,” by the American National Standard Institute, published by the American Society of Mechanical Engineers.

6. Measurement:

All measurements shall be at 75 degree F, or suitable temperature correction shall be made so that dimensions specified will be within the tolerances shown when measured at 75 degree F.

7. Weighing:

Before shipment, the Contractor shall determine, by the most accurate means available, the net weight of the furnished materials, exclusive of boxes, crates, or skids. A list of net weights shall be sent to the Contracting Officer. The net weight shall be painted on the respective pieces or assemblies or stated on tags attached thereto.

8. Transportation:

The Contractor shall be responsible for transportation of the furnished parts to the designated site as directed by the Tracy Office, Bill Dutton (209) 835-6245. The Contractor shall prepare all furnished materials for shipment in such manner as to protect them from damage in transit, and shall be responsible for and make good any and all damage due to improper preparation or loading for shipments. Where necessary, heavy parts shall be mounted on skids or crated, and any articles or materials that might otherwise be lost shall be boxed or wired in bundles and plainly marked for identification. If necessary, all parts shall be prepared for shipment so that slings may be attached readily to equipment. All furnished ferrous surfaces shall be coated with a rust-preventive compound, and all furnished non-ferrous metalwork and devices subject to damage shall be suitably wrapped or otherwise protected from damage during shipment.

Attachment No. 3 Specifications No. 20-C0835

Bureau of Reclamation 16650 Kelso Road Byron, CA 94514-1909 Attention: Mr. Bill Dutton Email: Wdutton@usbr.gov

9. Tasks:

Task 1:

The Contractor shall confirm dimensions for 56-inch PD drum and ring gears, 41-inch PD spur gears, and pillow block roller bearing housings in field.

Task 2:

The Contractor shall prepare a work plan and schedule for this project. The Contractor shall submit materials used for new gear fabrications for approval, fabricate all parts and acquire new pillow block roller bearing housings as specified in the specifications.

Task 3:

The Contractor shall deliver all new drum and ring gears, spur gears, and pillow block roller bearing housings to the Delta Cross Channel floodgate structure. The Contractor shall notify the Contacting Officer (CO) in writing a minimum of 7 days prior to delivery of all replaced parts.

10. Deliver:

The period of performance for this work is nine (9) months after the award. The work to be performed under this contract will be at the Contractor facility.

11. Notification:

The Contractor shall notify the Tracy office, Bill Dutton (209) 836-6245 in writing a minimum of 7 days prior to delivery of components.

LAR M TA IOCE N

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DELTA CROSS CHANNEL RADIAL GATE GEARS AND BEARING HOUSINGS REPLACEMENT