W912EK21R00200005.pdf

96514711525945

AMENDMENT OF SOLICITATION/MODIFICATION OF CONTRACT

Except as provided herein, all terms and conditions of the document referenced in Item 9A or 10A, as heretofore changed, remains unchanged and in full force and effect.

15A. NAME AND TITLE OF SIGNER (Type or print)

30-105-04EXCEPTION TO SF 30

APPROVED BY OIRM 11-84

STANDARD FORM 30 (Rev. 10-83) Prescribed by GSA

FAR (48 CFR) 53.243

The reason for this amendment is to incorporate revised Specif ications.

All other terms and conditions remain unchanged.

1. CONTRACT ID CODE PAGE OF PAGES

J 1 4

16A. NAME AND TITLE OF CONTRACTING OFFICER (Type or print)

16C. DATE SIGNED

BY 28-Jul-2021

16B. UNITED STATES OF AMERICA15C. DATE SIGNED15B. CONTRACTOR/OFFEROR

(Signature of Contracting Officer)(Signature of person authorized to sign)

8. NAME AND ADDRESS OF CONTRACTOR (No., Street, County, State and Zip Code) X W912EK21R0020

X 9B. DATED (SEE ITEM 11)

24-Jun-2021

10B. DATED (SEE ITEM 13)

9A. AMENDMENT OF SOLICITATION NO.

11. THIS ITEM ONLY APPLIES TO AMENDMENTS OF SOLICITATIONS

X The above numbered solicitation is amended as set forth in Item 14. The hour and date specified for receipt of Offer is extended, X is not extended.

Offer must acknowledge receipt of this amendment prior to the hour and date specified in the solicitation or as amended by one of the following methods:

(a) By completing Items 8 and 15, and returning copies of the amendment; (b) By acknowledging receipt of this amendment on each copy of the offer submitted;

or (c) By separate letter or telegram which includes a reference to the solicitation and amendment numbers. FAILURE OF YOUR ACKNOWLEDGMENT TO BE RECEIVED AT THE PLACE DESIGNATED FOR THE RECEIPT OF OFFERS PRIOR TO THE HOUR AND DATE SPECIFIED MAY RESULT IN REJECTION OF YOUR OFFER. If by virtue of this amendment you desire to change an offer already submitted, such change may be made by telegram or letter, provided each telegram or letter makes reference to the solicitation and this amendment, and is received prior to the opening hour and date specified.

12. ACCOUNTING AND APPROPRIATION DATA (If required)

13. THIS ITEM APPLIES ONLY TO MODIFICATIONS OF CONTRACTS/ORDERS.

IT MODIFIES THE CONTRACT/ORDER NO. AS DESCRIBED IN ITEM 14.

A. THIS CHANGE ORDER IS ISSUED PURSUANT TO: (Specify authority) THE CHANGES SET FORTH IN ITEM 14 ARE MADE IN THE

CONTRACT ORDER NO. IN ITEM 10A.

B. THE ABOVE NUMBERED CONTRACT/ORDER IS MODIFIED TO REFLECT THE ADMINISTRATIVE CHANGES (such as changes in paying office, appropriation date, etc.) SET FORTH IN ITEM 14, PURSUANT TO THE AUTHORITY OF FAR 43.103(B).

C. THIS SUPPLEMENTAL AGREEMENT IS ENTERED INTO PURSUANT TO AUTHORITY OF:

D. OTHER (Specify type of modification and authority)

E. IMPORTANT: Contractor is not, is required to sign this document and return copies to the issuing office.

14. DESCRIPTION OF AMENDMENT/MODIFICATION (Organized by UCF section headings, including solicitation/contract subject matter where feasible.)

10A. MOD. OF CONTRACT/ORDER NO.

2. AMENDMENT/MODIFICATION NO. 5. PROJECT NO.(If applicable)

6. ISSUED BY

3. EFFECTIVE DATE

28-Jul-2021

CODE

CONTRACTING DIVISION

US ARMY CORPS OF ENGINEERS 1500 ROCK ISLAND D

ROCK ISLAND IL 61201

W912EK 7. ADMINISTERED BY (If other than item 6)

4. REQUISITION/PURCHASE REQ. NO.

CODE

See Item 6

FACILITY CODECODE

EMAIL:TEL:

The following modification is made to Section 35 01 41.

35 01 41

a. PAGE SECTION 35 01 41 Page 13; Delete page SECTION 35 01 41 Page 13 in its entirety, and substitute therefor revised SECTION 35 01 41 Page 13.

SOLICITATION NO.: W912EK21R0020

B5IWPROJ202104

2.4 CRANK PINION SHAFT AND CRANK PIN

Provide shafts and pins to match dimensions as indicated and of forged AISI 4340 alloy steel. Quench and temper shaft to produce final hardness of

360-388 BHN.

2.5 OPEN SPUR GEARS

2.5.1 Gearing

Make spur gearing from high strength alloy steel, hardened with subsequent quenching, and tempered to produce a through hardened gear. Grind the gears after gear cutting to achieve a minimum ANSI/AGMA Quality Q8 in accordance with AGMA 2000-A88 or equivalent accuracy in accordance with ANSI/AGMA 1328-1-B14. Certified material test results for the crank gear, crank gear pinion, and crank gear pinion shaft are required.

The overall dimensions and configurations for spur gears and mating shafts, as indicated. Manufacturer gears to achieve specified and supplied as match marked sets. Factory test all gears in accordance with paragraph "SHOP QUALITY ASSURANCE." Provide spur gear teeth of the involute form with pressure angle as indicated. Provide spur gears as specified for backlash and gear tooth contact area requirements. Measure the gear backlash in unloaded conditions with one of the mating gears secured and the other gear manually rotated to obtain the backlash measurements. Use dial indicators or feeler gauges to collect backlash measurements. Provide gears with backlash of between 0.025 and 0.045 inch.

2.5.1.1 Crank Pinion Gear

Fabricate from UNS G43400 alloy steel, quench and temper gear to provide core hardness of 300-340 BHN and induction harden to provide full form (tooth and root) hardness of 50-55 Rockwell C. Make keys of UNS G43400 keystock. Fabricate pinion gear with a pitch diameter of 16 inches.

2.5.1.2 Crank Gear

Fabricate or cast construct to the overall dimensions and configurations of the crank gear. Quench and temper to provide through hardened gear to 300-340 BHN. Teeth profile to be standard 14-1/2 degree full depth involute with a diametral pitch of 1 and tooth width of 1.5708 inches. End relieve the ends of the pinion teeth to prevent end loading. Crown gear teeth as indicated. Machine the inside bore of the gear to provide the indicated fit with pinion shaft. Verify machining dimensions to ensure proper mounting. Scribe the pitch line, and two indexing lines offset 1/8-inch to each side, on the top of the gear teeth of all mated gears to aid in installation alignment.

2.5.1.2.1 Fabricated Crank Gear

Fabricate the rim, hub and pin socket of the crank gear of UNS G41300 or UNS G43400 with minimum yield strength of 124 ksi. Fabricate spokes and other structural supports from ASTM A36/A36M or ASTM A572/A572M Grade 50.

Design welded connections for 100 year fatigue life presuming 12 lockages per day. Use complete joint penetration groove welds for all welded joints

SECTION 35 01 41 Page 13

AMEND 0005

28 JULY 2021

W912EK21R0020

SECTION SF 30 BLOCK 14 CONTINUATION PAGE

SUMMARY OF CHANGES

(End of Summary of Changes)