Inquiry Announcement for Equipment Maintenance Service Procurement of Zhengzhuang Project Department of the 30th Engineering Division of middling coal No.3 Construction (Group) Co., Ltd. 1. Inquiry Scope No. Equipment Name Specification Model Maintenance Content Quantity Unit Remarks 01 Cantilever Jiamusi 260 Replace bearings, oil seals, replace floating seal seats, frames, spacers, and process and repair the main shaft. Replace the oil seal, spacer sleeve, first stage central gear, and 2 bearings of one 02 cutting reducer Jiamusi 260. Three broken screws were taken from the position of the Jiamusi 260 reducer of one 03 cutting mechanism, and the screw holes of the rear axle baffle were changed to the form of Sany 260H pin baffle. Four rear axle pins were processed and used together with the baffle, and four copper sleeves were changed to the rear axle, with four additional bushings for backup. Repair the upper and lower chute plates of one 04 rear chute Jiamusi 260, replace the upper and lower covers, chain wheels, and repair the screw holes of the drive device. Repair the edges of the chute and drive device according to the original factory specifications, install a chain press, and install a tensioning oil cylinder. Replace the lower plate of one 05 main shovel plate Jiamusi 260, replace the small chute, repair one broken ear frame of the main shovel plate, install copper sleeves, and repair all bolt holes. 1 set of 06 lifting oil cylinder Jiamusi 260, replace oil seal, repair 2 piston rods, 07 rotary oil cylinder Jiamusi 260, replace oil seal piston rod, plate 2 piston rods, 08 rear support oil cylinder Jiamusi 260, replace oil seal, repair 1 piston rod, 09 left star wheel assembly Sany 260H, repair welding and extend crawling claws by 25 centimeters (5 pieces), replace floating oil seal, 1 set of 10 star wheel motor Sany 260H, replace oil distribution plate, replace plunger, replace spline shaft. Replace the oil seal and plated the piston rod of one 11 rotary oil cylinder, Sany 260H. 1. Qualifications required for applicants: (1) Independent legal entity, with the required business scope for this bidding, the ability to independently enter into contracts, and must provide VAT special invoices. (2) Capable of independently assuming civil liability and fulfilling contracts. (3) Having a good credit rating, with no adverse performance or significant illegal records in the past three years of operation. (4) Other qualification requirements stipulated by laws and administrative regulations. (5) Bidders shall not have any of the following situations: ① have a vested interest in the bidder and may affect the fairness of the inquiry; ② The person in charge of the same unit as other bidders in this inquiry project; ③ There is a controlling or management relationship with other bidders in this inquiry project; ④ The property is reorganized, taken over, sealed, seized or frozen; ⑤ Those who have fraudulently won the bid in the past three years; ⑥ Termination of contract/agreement due to serious breach of contract agreement within the past three years. 3. The bid invitation system can be set up in China Coal Mine for those who intend to participate in bidding（ https://zmjc.ccmcgc.com ）Register and sign up. After the application is approved, the bidding and mining system will be established from China Coal Mine（ https://zmjc.ccmcgc.com ）Obtain the inquiry document. 4. Deadline for registration: 10:00:00, April 24, 2025 Deadline for quotation: 11:00:00, April 24, 2025 Time for bid opening: 11:00:005, April 24, 2025 Name of inquiry unit, address and contact information unit: middling coal Third Construction (Group) Co., Ltd