USCGC ALDER Main Diesel Engines, Mount Renewal

[1/17 1:06 PM] Cox, Brenden S (SA) PO3 USCG SFLC (USA) This is a combined synopsis/solicitation for commercial items/services prepared in accordance with the format in FAR Subpart 12.6 as supplemented with additional information included in this notice. This announcement constitutes the only solicitation; quotations are being requested and a written solicitation will not be issued. This Request for Quotations incorporates provisions and clauses in effect through Federal Acquisition Circular 2005-65 dated January 29, 2013. The NAICS Code is 336611. The small business size standard is 1250. This is a total small business set aside. All responsible sources may submit proposals that will be considered by the agency. The contract will be awarded on a firm-fixed-price basis using simplified acquisition procedures in accordance with FAR Part 13.5. The United States Coast Guard Surface Force Logistics Center has a requirement for the following: The CTR shall provide: Main Diesel Engines, Mount Renewal (SOW) 1. SCOPE 1.1 Intent. This work item describes the requirements for the Contractor to renew the six engine mounts per engine on both Main Diesel Engines (MDEs). With new mounts installed MDEs shall be shimmed as required to restore alignment. 1.2 Government-furnished property. MTI ITEM DESCRIPTION NSN/PN QTY ESTIMATED COST ($/UNIT) Y TSC T2 40/60 Unit Isolator T2.R40.60.C01.00 4 600.00 Y TSC T2 50/60 Unit Isolator T2.R50.60.C01.00 8 600.00 2. REFERENCES COAST GUARD DRAWINGS Coast Guard Drawing 225B-WLB 233-1, Rev D, Propulsion Train Installa?on Drawing COAST GUARD PUBLICATIONS Coast Guard Technical Publica?on (TP) 3518B, 07-MAY-01, Main Diesel Engine (MDE) - Model 3608/1 Coast Guard Technical Publica?on (TP) 3523B, May 2001; Coupling, Torsional (Flexible), Manufacturer: American Vulkan, Model NO. RATO-S 3321-2100/1070 (Rev B) Surface Forces Logis?cs Center Standard Specifica?on 0000 (SFLC Std Spec 0000), 2012, General Requirements OTHER REFERENCES The Society for Protec?ve Coa?ngs (SSPC) Surface Prepara?on Specifica?on No.1 (SSPC-SP 1), 2004, Solvent Cleaning 3. REQUIREMENTS 3.1 General. 3.2 CIR. None. 3.2.1 Tech Rep. The Contractor shall provide the services of qualified Tech Rep, who is familiar with - Large Diesel Engine Alignment to accomplish the following tasks - on site: - Measure states of alignment. - Furnish and use laser alignment tools and fixtures in measuring alignment. - Determine engine movements to obtain sa?sfactory alignment - Determine shim thicknesses as required to even load engine mounts. 3.1.2.1 The Contractor shall submit the name of the Tech Rep to the COTR at the Arrival Conference. 3.1.2.2 The Contractor shall be required to have this Technical Representa?ve present (mandatory), on site, while the following engine work is being performed: - When obtaining all alignment readings/measurements, and all engine movement events (jacking screws being turned) NOTE The Technical Representa?ve may be present at other ?mes in addi?on to the mandatory ?mes listed above. The above represents the minimum required Technical Representa?ve usage. 3.1.3 Protec?ve measures - general. The Contractor shall furnish and install all protec?ve coverings to seal off and protect all non-affected vessel's components, equipment, and spaces in the vicinity of the work area against contamina?on during the performance of work. Upon comple?on of work, the Contractor shall remove all installed protec?ve measures, inspect for the presence of contamina?on, and return all contaminated equipment, components, and spaces to original condi?on of cleanliness. 3.1.4 Interferences. The Contractor shall handle all interferences in accordance with SFLC Std Spec 0000, paragraph 3.3.5 (Interferences). 3.2 Background informa?on on main engine resilient mount installa?on. 3.2.1 The intent of this item is to renew the engine mounts and then realign engine to reduc?on gear on both MDEs. CG Dwg 225B-WLB 233-001 shows the MDE installa?on onboard the vessel. Atached Figure 1, - Photos of Current MDE mounts illustrate the installed mounts. 3.2.2 The concerned work area is the Main Machinery Room (4-66-0-E). 3.2.3 The MDE mounts are manufactured by Chris?e-Grey and are supplied Government Furnished. 3.3 Removing Exis?ng TSC T2 Mounts. The Contractor shall accomplish the following tasks. 3.3.1 The installed shipyard jacking brackets provide for ver?cal jacking screws to be used at each corner for the ver?cal posi?on/alignment of the engine. These shipyard jacking brackets may be seen in Figure 1, - Photos of Current MDE mounts. The contractor shall provide new jacking screws, with the ends - domed to help prevent engine from walking side to side. 3.3.2 In addi?on to ver?cal jacking, temporary horizontal screw jacks shall be required in both the longitudinal and transverse direc?ons at all four corners of the engine to provide adjustment in the longitudinal and transverse direc?ons, and rota?on about the ver?cal axis for the alignment process. In some case the horizontal screw jack posi?ons may already be in place, as evidenced by atached photos. If not Contractor shall install in similar fashion as those depicted in atached photos. In all cases the contractor shall provide new jacking screws with ends - domed. 3.3.3 With engine supported by jacking screws, one by one at each engine mount, depress the mounts very slightly using jacking screws inserted into the top to remove the sloted commissioning plates. A?er the commissioning plates are removed, along with any other shims, the mounts can be allowed to expand and then be unbolted and removed. 3.3.3.1 Remove the exis?ng shim packets from each of the engine mounts. Clean, measure, and record the shims at each loca?on. Keep the shims which were removed from each engine mount separated. 3.3.3.2 Using precision measuring tools, determine the quan?ty and type of shims installed above each mount between the engine support bracket and the top of the mount. There should be two commissioning plates, one 10-millimeter and one 5-millimeter. In addi?on, there may be addi?onal shims added to compensate for setlement and facilitate engine alignment over the life of the mount. The 5- and 10- millimeter commissioning plates should be retained for reuse with the new mounts. If these plates are missing, then new plates must be fabricated prior to the installa?on of the new mounts in addi?on to four addi?onal sets of commissioning plates for the new mounts. 3.3.3.2 For each mount, remove (and retain) the upper atachment bolt. 3.3.4 Install new GFE mounts, the original shims from previous new mount alignment should be reused. If the MDEs were previously re-shimmed at the mount's half life (4-5 yrs) to offset setling, the alignment may now be high with fresh mounts installed. 3.3.4.1 The mounts are installed in specific orienta?on and loca?ons. As atached figure illustrates the two TSC T2 40/60 mounts are installed closest to Vulkan coupling (on each side of MDE). 3.4 Engine Alignment Check. 3.4.1 Disconnect engine guards and disconnect the Vulkan coupling from the engine and reduc?on gear. 3.4.2 The following work shall be completed a?er the cuter is afloat with normal opera?ng levels of fuel, water and ballast. 3.4.3 The following work shall accomplished under supervision of Alignment Tech Rep. 3.4.4 At this point the engine pre-heaters should be turned on and the engine brought up to temperature, a process that will take approximately six hours. This will allow all thermal expansion of the engine to take place. With the engine up to temperature, the alignment can be rechecked. 3.4.5 Measure the engine alignment again in the presence of the COTR. The following tolerances apply for radial(rim) and for angular(face) displacement: +/- 0.020". Total Indicator readings (TIR) would be twice the value. Note the engine is inten?onally offset 0.032 to Port per drawing for engine torque effects. In addi?on addi?onal offsets have been factored in to allow for outboard expansion of Reduc?on Gear's input flange due to increased temperatures at normal opera?ng condi?ons (HOT) vs. ambient condi?ons found during alignment (COLD). See following Table to re-enforce alignment criteria. PORT MDE ALIGNEMNT CRITERIA ACCEPTABLE RANGE OF RADIAL ALIGNMENT (RIM DISPLACEMENT) ACCEPTABLE ANGULAR ALIGNMENT (FACE DISPLACEMENT) Ver?cal displacement Horiz displacement (includes Red Gear expansion outboard due to 60F degree temp delta HOTCOLD) Ver?cal displacement Horiz displacement 0.020 engine high to 0.020 engine low 0.070 engine to port to 0.030 engine to port 0.020 or less 0.020 or less STARBOARD MDE ALIGNEMNT CRITERIA ACCEPTABLE RANGE OF RADIAL ALIGNMENT (RIM DISPLACEMENT) ACCEPTABLE ANGULAR ALIGNMENT (FACE DISPLACEMENT) Ver?cal displacement Horiz displacement (includes Red Gear expansion outboard due to 60F degree temp delta HOT-COLD) Ver?cal displacement Horiz displacement 0.020 engine high to 0.020 engine low 0.034 engine to port to 0.006 engine to STBD 0.020 or less 0.020 or less 3.4.6 Ensure jacking screws are all removed or withdrawn, then record the engine alignment readings. 3.4.7 Measure and record the height of each vibra?on mount following instruc?ons of Chris?e & Grey Data Sheet DS 094 (atached). Insure they are within compliance of Chris?e & Grey Data Sheet DS 096 (atached). Provide copy of post transfer mount heights to Chris?e & Grey. The heights are expected to be roughly equal at each isolator ensuring they are all carrying equal load. Flange face alignments may be excellent at same ?me an interior mount was completely unloaded. Record the data in a copy of the atached data sheet (found as enclosure at end of specifica?on) for each MDE. Measurements will be witnessed by the COTR. 3.5 Determining Addi?onal Shim Thickness (ver?cal adjustments) and Engine Movements (Horizontal adjustments). 3.5.1 Based on mount heights and alignment readings, determine required addi?onal shims that are required for each mount to obtain final alignment mee?ng both alignment criteria in above table as well as uniform mount heights (Chris?e & Grey Data Sheet DS 096). Any unused shims shall be returned to USCG Inspector for future efforts. 3.5.2 Install calculated shims. 3.5.3 Determine any horizontal movements required to meet alignment criteria. Loosen mounts, and use jacking screws and/or other approved techniques to execute engine movements. 3.5.4 Ensure jacking screws are all removed or withdrawn, then repeat alignment measurements and mount height readings. 3.5.5 Repeat shimming and movements, followed by addi?onal readings, un?l alignment criteria is finally met. 3.5.6 Submit final report to COTR via CFR with final alignment results, recommenda?ons for future similar jobs, difficul?es, and any other notable findings. 3.5.7 Reassemble the engine components e.g. coupling, coupling guards. Ensure mounts are final torqued. Ensure jacking screws are all removed or withdrawn. 4. NOTES 4.1 Do not scrap unused shims, retain for future use. 4.2 Provide CG inspector the opportunity to inspect and stamp GFE engine mounts with base measurement, 85 mm, prior to installa?on POP: 18 June - 17 July 2024 Deliver to: 1 Yerba Buena Rd. San Francisco, CA 94130 POC: CWO Christopher Laterza +1 (555) 000-0000