Diesel Engine Overhaul SOW.docx

CRAFT: YP SPARE Main Diesel Engines Revision 2

Engine Overhaul Requirements (March 2021)

1. SCOPE OF WORK

Overhaul service for Two (2) Detroit Diesel series 12V-71N marine main propulsion engines. Engine equipment specifications are available from the manufacturer. Engines shall be picked up and dropped off at the United States Coast Guard Yard, 2401 Hawkins Pt. Rd, Baltimore MD, 21230. Bldg. 58. Work is required to be completed and engines delivered to Coast Guard Yard by 17 December 2020.

Engine S/Ns:

12VA-77806 Port MDE Detroit Model 7122-3001 12VA-77796 Stbd MDE Detroit Model 7122-7001

1. PERIOD OF PERFORMANCE

0. Pick up engines from CG YARD Baltimore, MD: 04 March 2021

0. Drop off engines no later than: 04 July 2021

1. OVERHAUL AND PERSONNEL REQUIREMENTS

1. Engine overhaul work shall be performed by an Authorized Detroit Diesel Distributor/Dealer repair facility, or approved alternative, with the exception of non-Detroit Diesel engine accessory overhaul, which may occur at a sub-contract site.

2. Use only Detroit Diesel factory trained and certified technicians for engine disassembly, inspection, reassembly and testing. Technician shall be directly employed by the repair facility contractor.

3. Replacement parts shall be new or factory built.

4. Disassemble and chemically clean each engine before overhaul.

5. Test all major components for suitability for re-use by hydraulic pressure test or non-destructive test methods. The following items are in this category:

a) Cylinder Block

b) Flywheel housing

c) Flywheel

d) Oil pan

e) Oil cooler housing

f) Heat exchanger tank

g) Front balance weight cover

h) Front crankshaft cover

i) Front crankshaft pulley

j) Thermostat housing

k) Blower air inlet housing

l) Gear train

m) Rocker cover

n) Crankshaft

o) Air Silencers Furnish written documentation of all test results to CG YARD points of contact and make failed components available for inspection by a CG YARD inspector. Obtain written authorization from the CG YARD prior to purchase or installation of any of the parts inspected in this section. Replace all fuel and lube oil with identical or equal parts.

6. Replace all sea water and coolant hoses and hose clamps with identical or equal parts.

7. Replace engine gauge board vibration snubbers and mounting hardware

8. Ensure that all engine component and assembly specifications are in accordance with current Detroit Diesel engine specifications.

9. The items, parts, or components described herein shall be furnished in strict accordance with the manufacturer’s published data relating to said supplies. Utilized parts shall be interchangeable with the manufacturer’s original equipment.

10. Provide the following measurement readings and manufacturer tolerance and specifications for:

a) Blower Clearances

b) Injector height settings

c) Valve lash adjustments

d) Crankshaft thrust

11. Assemble engine and install the following new parts in each overhauled engine:

a) Cylinder components, i.e., piston domes and skirts, piston rings, piston pins, piston rod bolts, cylinder liners

b) Main bearings, rod bearings, camshaft bearings, thrust washers, idler bearing

c) Gaskets and seals

d) Engine oil cooler cores

e) Transmission oil cooler cores (not applicable to SSDG engine)

f) Thermostats

g) Air Silencers

h) New blower intake housing/air shutdown assembly.

12. Replace engine electric starter assemblies and alternator assemblies with identical re-manufactured assemblies.

13. Prepare each engine for painting after assembly. Preparation, priming and painting must be in accordance with the topcoat manufacturer's instructions. Topcoat must be designated engine enamel in the following color: Detroit Diesel Green. The Contractor shall ensure that flexible hoses installed on the engine are not painted.

14. Accomplish break-in and dynamometer test on each engine. Furnish a dynamometer test report with each overhauled engine certifying engine performance equal to Detroit Diesel performance specifications for that engine type and model. Test report shall be provided at time of engine delivery. Dynamometer tests shall be witnessed by a CG YARD Point of Contact unless otherwise requested prior to acceptance of any report.

15. The items, parts or components described herein shall be furnished in strict accordance with the manufacturer's published data relating to said supplies. Utilized parts shall be interchangeability with the manufacturer's original equipment

1. COMMERCIAL WARRANTY REQUIREMENTS

Warranty each overhauled engine against any defects in workmanship and materials according to the following schedule:

1) Warranty for defects in workmanship shall begin at start of engine light-off and remain in effect for a minimum of (12) months thereafter.

2) Warranty for defects in new parts shall begin at start of engine light-off and remain in effect for a minimum of (6) months thereafter.

Provide warranty repair service at any and all points along the eastern seaboard of the United States and Canada at no additional expense to the Government for transportation of parts, cost of technicians (transportation or time of technician), or removal and transportation of engine in the case of catastrophic engine failure.