Restore 3306 engine performance with the Caterpillar 7N7748 Turbo (3LM-373). Engineered for D6D dozers and 140G graders, this direct-replacement unit is stocked for immediate wholesale dispatch
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This Caterpillar 3LM-373 Turbo (Part No: 7N7748) is a foundational component within our wholesale Industrial Diesel Engine Parts catalog, specifically configured for the heavy-duty maintenance of Caterpillar 3306 and 3306B series engines. Designed to support fleet managers and parts distributors, this unit ensures precise air-fuel ratios and combustion efficiency for earthmoving machinery operating in severe dust and load conditions.
Engineered for “Uncompromising Job-Site Durability,” our aftermarket replacement strictly adheres to the 3LM-373 flow maps and pressure ratios. Whether you are servicing a D6D track-type tractor or a 140G motor grader, this turbocharger addresses common field failures such as bearing play and seal leakage caused by oil contamination. It serves as a direct, drop-in solution for the OEM 7N7748 and Reman 0R5807, providing the reliability required to minimize downtime in commercial construction operations.
| Part Name | Turbocharger / Cartridge Assembly |
| Turbo Model | 3LM-373 (Schwitzer S3B Type) |
| Engine Platform | Caterpillar 3306 / 3306B / 3306DI |
| Component Material |
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| Cross Reference / OEM Numbers |
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| Application Category | Industrial Diesel Engine Parts |
Technician’s Note: The 3306 engine is notorious for oil line coking which kills new turbos instantly. Before installing the 7N7748, you must physically verify that the oil supply line is free of carbon deposits and that the oil drain pipe is not obstructed, ensuring proper lubrication flow to the floating bearings.
| Engine Model | Application Field | Equipment Models |
|---|---|---|
| 3306 / 3306B | Track-Type Tractor (Dozer) |
|
| 3306 | Motor Grader |
|
| 3306 | Wheel Loader |
|
Our inventory extends far beyond the 7N7748, covering a comprehensive range of Industrial Diesel Engine Parts. We supply air system components for the full spectrum of Caterpillar heavy-duty applications, from legacy mechanical engines to modern ACERT systems.
Category coverage: Complete turbos, CHRA cartridges, repair kits, and housings for CAT 3300, 3400, C9, C15, and C18 series.
| TURBO MODEL | OEM & PART NUMBERS | Engine/Application |
|---|---|---|
| 3LM-319, 3LM-320 | 159623, 0R5809, 4N8969, 6N1571 | Caterpillar Dozer, Excavator, Grader with D333C, 3306 Engine |
| S200G027 | 167865, 120-8362, 1208362, 0R6973 | Caterpillar 950G Earth Moving with 3126 Engine |
| T1238 | D8K,6N7203,465032-5001S,465032-0001, 465032-9001, 465032-1,0R5841, | Caterpillar Earth Moving D8K, 583K with D342 Engine |
| TD06 | 49179-02340/49179-02300/5I8018/49179-02390 | Hyundai 7-Series Crawler Excavator, Cat 320C, Cat 320B, E320, Construction S6S-Y2DT Hyundai Excavator 320, Crawler with 3066 Engine |
| TD06-14C | 49179-00451/49179-00460/49168-00330/5I7903 515015/517585/2870049 | CAT E200B Excavator 1992- Caterpillar Excavator with E200B Engine |
| TD06 | 49179-02260/49179-02240/517952/ME517952 49179-02260 4917902260, 49179-02220, 49179-02230, 49179-02240 OEM Part Number 5I7952, 5I-7952, ME518122, 518122 | Excavator 320, Cat 3066, 320B Caterpillar Excavator 320, Earth Moving with 3066 Engine |
| TO4B91 1.52 | 409410-0004 /409410-0005/409410-0006/409410-0007 409410-0008/409410-0010/409410-0012/4N6858 7N4651/7N1709/7N2342/7C2175/1W5160/2W8139/OR5796 | Machine Engine, Earth Moving, Excavator Caterpillar Earth Moving with 3304 Engine |
| TO4B91 1.75 | 409410-0001/409410-0002/409410-0003/409410-0009 4N6859/OR5799/1P9136 409410-5002S Previous Version 409410-0002, 409410-0001, 409410-0003, 409410-0009 4N6859, 0R5799, 1P9136, 4N-6859, 0R-5799, 1P-9136 | Caterpillar 120, 120G, 130G, 225, 518, 950, 950-Wheel Loader, 518-Skidder 3304-Engine, Industrial, Excavator (3304) Earth Moving |
| 3LM319 | 4N8969/159623, 0R5809, 4N8969, 6N1571 | Caterpillar Dozer, Excavator, Grader with D333C, 3306 Engine |
| 3LM-373 | 7N7748/219-1909/106-7407/310135 184119, 40910-0006, 172495 7N7748, 0R5807 | Caterpillar Earth Moving with 3306 Engine |
| CAT325C W | 173270/178475/177-0440/185-8016/1784752/1784755/OR7979 | 2001-13 Caterpillar Earth Moving 325C Excavator (Bagger) with 3126B Engine 325C Excavator, SCM 966G |
| CAT-29 CAT325D | 250-7696/250-7698/175273 , 10R-3759 | 2005-09 Excavator Caterpillar Earth Moving, Hydraulic Excavator, Forest Swing Machine, Material Handler, Industrial Engine 2005-09 Caterpillar Earth Moving Excavator 325D L With C7 Engine |
| CAT325C without actuator HD | N/A | CAT325C |
| S310 4LE504, 4LE-504, S3BSL164 | 155550/310258, 171376, 178467 1P9373, 0R-9956, 174-1644 | 2001-12 Caterpillar Earth Moving with 3176C Engine |
| CAT330C W WATER COOLING S310G-87N39DT-ABM/80BM1-1.10VTF, S310G119 | 179251/175210/10R2969/10R2858/2507700/250-7700/174938 10R-2618, 10R-4117, 3584924, 20R-0125, 2480323 | 2004-10 Caterpillar Industrial Engine with C9 Engine |
| CAT330C W OLI COOLING | 250-7701/258-0323/1981845/174947/3595389/10R-2739/10R0126, 250-7701/169369, 0R-7180, 139-7741, 0R-7180/ 166338 | Caterpillar Machine Engine with 3126 DITA Engine |
| CAT330C WATER COOLING wothout actuator | 248-5246/174755 Previous Version 178484, 171847 OE Number 248-5246, 2485246, 248-5376, 2485376, 10R-2232, 10R2232, 1OR-2232, 1OR2232, 10R-2355, 10R2355, 1OR-2355, 1OR2355, 191-5094, 10R0368 | 1980-13 Caterpillar Earth Moving, Machine 300C, 330C with C9 Engine Earth Moving Caterpillar Machine 300C, 330C |
| CAT330C B2G OLI COOLING without actuator | 191-5094/175276/10R2769/250-7699 2814202, 3351707, , 4464915, 4464923 | Excavator Caterpillar Earth Moving 2006-01 Caterpillar Earth Moving Excavator AP 1055 C With C7 Engine |
| CAT-28 | 167559, 452173-1 87800544 1151179, 0R6899, 115-1179,167384 | Caterpillar Earth Moving With 3116, 3126 Engine 320B, 320B L, 320B N, 320B S, M318, M320 Machine Engine 3116, 3126 |
| TO4B91 1.32 | 409410-0011,409410-0013,409410-0014,409410-0015,2W1953, 409410-5011S, | 3304 DIT |
| S3BSL-128 | 1275150,167972,168443,169425,1413247,118-2284,219-9710,2199711,OR6981,OR7052,OR7196,10R1011,10R1012 | 1995-06 Caterpillar Earth Moving 3306 |
| GT47 GTA470201BS, GT4702BS, GT470201BS | 704604-7,196-5951,704604-5007S,704604-0007, 704604-0006, 704604-0003, 704604-7,0R7310, 1679271, 167-9271, 0R7310, 176-7716, 0R9806, 160-5548,174248,177148, | Truck, Earth Moving, Engines and Power Units 1994-01 Caterpillar Truck with 3406E, C15 Engine |
| TV81 OLI COOLING | 465048-0001, 465048-9001, 465048-5001S, 465048-0002 465048-0003, 6N7958, 7N1758, 7N2495, OR5754 | Caterpillar Earth Moving with D353 |
| TV81 WATER COOLING | 4P8730 466271-5001S,466271-0001, 466271-9001S, 466271-1,4P-8730, 0R6328, | Caterpillar Construction with 3408 D9R Engine |
| S4DS011 | 196538,7C7580,7C7579,OR5949,178106,196554,196554,85Z3513-3763, 08Z39170-99999, 5JC549-UP, 8Z39170-UP, 8TD1320-UP, 08Z42420-99999, 64Z5745-UP, 85Z3764-UP, | 1987-02 Caterpillar Earth Moving with 3306 Engine |
| S2E 0279 S2ESL, S2BS001 | 4P4682,197902,9Y4232,199292,98Z3460-UP, 2WG1242-99999, 98Z3460-UP | Caterpillar Industrial Excavator with 3116T Engine |
| CAT-25 S2ESL113 | 167303,0R7185, 112-4896,9LN00001-UP, SEBP23770175, | Truck, Earth Moving Caterpillar Truck, Earth Moving with 3116 Engine |
| CAT-5 S4DS034 S4DS-114H55DAXM/1.58VT97H1 | 130-5469,OR7075,168665, 0R7075,41Z257-UP, 41Z4926-UP, 41Z21009-UP, 41Z2438-99999, 1LS1-UP, 4ZR1-UP, 8FS1-1026, 6TB18056-UP | Industrial Engine, Truck (Off-Highway) S4DS-114H55DAXM/1.58VT97H1 1995-10 Caterpillar Industrial with 3406C Engine |
| CH11218 GTA500201BS GT500201B, GT5002 | 701756-0013,223-1469,208-0037,701756-5013S,, 701756-9013S,CH11218, 223-1469, 1190685W, OBM-30797 | Perkins Truck Industrial Caterpillar Industrial Engine, Truck 3400, 3406E |
| CAT980 | 7E7987,49132-00010,49132-00020,7E7987, 0R6448, | 1992- Caterpillar Earth Moving 980F Loader with 3406 Engine |
| S310 | 211-6959, 2116959, 172831, 172830, 173038, 173039 472830, 2116964, 10R0568, 3595392, 211-8251, CH11517, 211-8252, | 2003-08 Caterpillar Genset with C18 EPG 50Hz Engine |
| S300G | 178468, 171574, OR7569, 170340, 1660324,171636, 171998, 171999, 172000, 172001, 172002, 172003, 172004, 172005, 172006, 172007, 171595 OE number 192-0949, 191-8028, 193-5867, 198-8717, 198-8718, 198-8720, 198-8721, 198-8722, 198-8723, 198-8724, 198-8725, 198-8726, 198-8727, 1920949, 0R-7569 | 2000-12 Caterpillar Truck 793 HD with 3126E, 3516B Engine |
| TB2571 | 452181-0001, OR9510, 2674A079 123-2926,452181-5001S, 452181-9001S, U2674A079, 123-2926 | Caterpillar 315 Excavator 3054 JCB Excavator 315 Earth Moving |
| GTA5008 GT5002BS GTA4702BS | 750058-0001, 750058-9001, 743001-0002 230-3542, 239-9988,750058-5001S,750058-1 (712371-5117S 712371-5117, 712371-117, 255-5477 | Caterpillar Industrial Engine with C15 Engine |
| S2E S2EGL112 | 167302,171963,171964,1251126,1956029,1956031,105-5059 - 0R6865, | Caterpillar Earth Moving 950F Loader with 3116 Engine |
| CH11946 GTA5518BS , GTA5008B, GTA5008BS | 750525-0021,750525-0020,750525-0011,750525-9021,750525-5028, 2842711, 3021407, 274-6296, 3320045, 750525-5021S, 750525-21, 750525-11, CH11946, 274-6296, R/CH11946, | C15 Standby Generator Set C5H00001-UP Caterpillar, Perkins Industrial Generator Set with C15 Engine |
| 3ER/UTV7507 | 466869-2 466869-5002S 466869-0002, 466869-9002, 466869-2 124-7622, 122-7622, 1247622, 1227622, 0R6994 | Caterpillar Earth Moving with 3406 DITAJWAC 144 Industrial 14.60L, 14600 ccm, 6L Cylinders Articulated Dump Truck D350E, D400E Machine Engine 3406, 3406B, 3406C Industrial Engine 3406C Road Re-claimer RM-250C, RR-250B, SS-250B Wheel Tractor-Scraper 623E, 623F |
| S2ESL105 | 179583, 168362, 125-1124, OR7010 | Caterpillar Earth Moving 938F Loader with 3116, 3126 Engine |
| F-302, 4LF-302 | 315792, 183200, 0R5804, 7N-2515, 182778 | 1976 Caterpillar Earth Moving D398B with 3306, 3306B, D398B Engine |
| TV81 | 11180400,465332-0012, 465332-12, 465332-9012, 465332-0006, 465332-5012S 144-4568,0R7219, | Caterpillar Earth Moving, Industrial, Marine with SR4, 3406, 3412 Engine |
| TD06 | 49179-02350/2056741/ME2056741/10R7610 | Excavator 320C, Cat 320C Construction 1980-13 Caterpillar Excavator 320C Earth Moving with 3066 Engine |
| GT4502BS C13 | 2433768 243-3768 | Caterpillar |
| 4LF302 | 1W1227,310138,0R5801, 186514, | Caterpillar Earth Moving with 3306 Engine |
| 4LF302 | 1W9383/312100/188127/OR5761 | 1981-08 Caterpillar Earth Moving Cat 966 with 3306 Engine |
| S2ESL, S2BS001 | 313663,4P-4677, 1005865, 199292 | Caterpillar Industrial Excavator with 3116T Engine |
| S2BS001 | 166340/1005864/466340/OR6598 | Caterpillar IT28F 928F 950F, Earth Moving 1990- Caterpillar Earth Moving 928 Loader With 3116, 3126 Engine |
| TO4B65 | 465088-0001/6N8477/OR5824/6N8566/465088-5001S 465088-9001S, 465088-0001 6N-8477, 0R5824, 6N8566 408077-0104 (408105-0089, 408105-0383, 408077-5102, 408077-5104S, 8N4780, 0R5563) | Off Highway Construction, Earth Moving Caterpillar 926E, 953 Earth Moving with 3204 Engine |
| S2EGL094 S2ESL094 | 166773/166753/OR6743/1028410/167604/OR6906/1155853/106-8274 | 960-Front Wheel Loader 1992-03 Caterpillar 960 Front Wheel Loader with 3116 Engine |
| S300AG072 | 175480/175479/178046/2692920/10R3280/2692915/2692916 2692917/2692918/2692919/2692921/2692922/2692923 2692924/2692925/2692926 | 2005- Caterpillar Truck with C7 Engine |
| S310G085 | 173415/222-4756/10R1063 | Truck, International, NVSTR 8600 Single AXLE 2002-07 Caterpillar Truck with C-10 Engine |
| S200AG050 | 171859/178474/185-8016/OR7981/2500841 | 2000- Caterpillar 950, 962 Loader with engine 3126B Caterpillar 950, 962 Loader |
| GTA5518BLS | 751286-5021S, 751286-0021, 296-7632, 2967632 | Caterpillar 988H Earth moving C18 |
| S2ES083 | 314522,100-5865, 4P4677, 1005865,0R6599 | 1992-05 Caterpillar Marine, 950F Loader Earth Moving 3116T engines |
| S4DCL029 CAT3412 | 169090, OR7144, 136-8314 | Caterpillar Earth Moving 990F Loader with 3412 Engine |
| BTV8501, BTVA8501 | 466807-5001S, 466807-0001, 466807-9001, 466807-0003, 466807-5004S, 466807-5005S, 118-0398, 1989914, 10R0435, 207-1351, 10R-0435 | 2001- Caterpillar Generator Set Industrial Engines and Power Units with 3508B, 3516B Engine |
| S2ESL-105 | 167575, 115-1181, 0R6904 | Caterpillar Earth Moving with 3116T Engine |
| GTA4294S, GT4294 | 714508-5003S, 714508-0003, 714508-0004 190-6212, 190-6213, 0R7579 | 1999- Caterpillar Various, Truck with C12 Engine |
| S2ESL094 | 168190, 124-9332, 0R7000 | 1995-11 Caterpillar Earth Moving with 3116TA Engine |
| S3BSL, S3BSL161 | 171368, 178466, 0R9959, 185-5732 | 2000-09 Caterpillar Wheel Loader 996X/810X with 3176 Engine |
| TA3107 | 465778-5016S, 465778-0016, 465778-9016S, 0R-4543, 2674396 | Caterpillar 438C, Perkins Backhoe Agricultural Tractor with CA4.236 Engine |
| TE06 | 49185-51800 | CAT325 |
| S2ESL-119 | 167559, 0R6899, 115-1179, 167384 | Caterpillar Earth Moving With 3116, 3126 Engine |
| B2G, B2G005 | 175183, 252-5165, 10R-3749 | 2005-10 Caterpillar Bulldozer C9 |
| GTA4502S, GTA4502BS | 762548-5004S 762548-0004, 762548-9004, 762548-0008, 2558862, 10R8970, 3315888, 20R2916, 10R7297, 247-2964, 331-5888, , 255-8862, 2751294 | 2003- Caterpillar Truck, Industrial C13 |
| E-504, 4LE-504 | 180287, 178048, 147197, 149168, 149169, 5327970500, 310258, 180288, 4N9618, 4N9536, 4N9554, 0R5812, 7S1702, 8S9234, 8S9237, 0R5895, 7S1701 | 1981-06 Caterpillar Earth Moving with 3306 Engine |
| GT2560S | 785828-5002S 768525-0007, 768525-5007S, 785828-0002, 2674A807 316-0514 | 2006- Perkins Various, Construction Engine Tier 3 |
| TV8110 (OIL COOLING) | 465480-5001S 465480-0001, 465480-0002, 465480-0003, 465480-0005, 465480-9001, 465480-1, 0R5369, 9N-5264 | Caterpillar Earth Moving with 3406A DITA Engine |
| TV8106 | 465048-5009S, 465048-0008, 465048-0009, 465048-9009, 1W6551, 0R6366, 1W6552 | Caterpillar Earth Moving with 3512 DITA RH Engine |
| GTA4702BS | 732915-5001S, 732915-0001, 732915-9001, 732915-5001S, 732915-0003, 222-1133, 10R-1065 | 2000- Caterpillar Truck with C15 Engine |
| GTA5008, GTA5008BS | 732430-5003S, 732430-0003, 732430-9003, 240-0003, 10R2622 | Caterpillar Industrial Engine with C15 Engine |
| S200G001 | 168867 168476 1279331, 127-9331 ,1333830, 133-3830, 0R7099 | Caterpillar Earth Moving, Truck Engine 3116 |
| S200G | 4314572, 12709700133, 9502994500190, 12709880133 1453437 431-4572, 13J17-0007 3563509 3645955 3563518 3563519 3563506 3563516 | Caterpillar Excavator CAT 320D2 320D2 GC 320D2 L Engine C7.1 |
| S200G062 | 173106, 167865, 167865R, 171173, 171173R, 171174, 171174R, 171963, 173106R, 173107, 173107R, 178478, 178478R, 0R6973, 0R9802, 10R0364, 120-8362, 177-1063, 177-1064, 195-6029, 198-1845, 198-1846 | 2001-10 Caterpillar Earth Moving 938G, 950G, 962G Wheel Loaders with 3126 Engine |
| GTA50, GTA500201BLS | Part Number 712303-5005S Previous Version 712303-0005, 712303-5005, 712303-5 OE number 1789572, 178-9572, 0R9898 | Caterpillar Earth Moving (Truck, Tractor) D8R. D8X. 5110B with 3406, 3406B Engine |
| TD04HL-13G-8.5 TD04HL-13G | Part Number 49189-02710 Previous Part Number 4918902710, 49189-02711 OE number ME080442, 10R7602, 235-4964, 234-4894 | Caterpillar Skid Steer 277B, 278, 287B Track Loader with 3044C Engine 4 Cyl. 78 HP Caterpillar Earth Mover with 4D13T Engine Kubota Earth Mover with 4D13T Engine |
| GT2556S | 738233-5001S, 738233-0001, 738233-1, 2674A403 | 2003- Caterpillar 3054D, Perkins 1104 Engine |
| S2BS001 | 313624, 166321, 199298, 9Y1279, 4P2768, 4P4681, 4P4679, 4P2768E, 0R6239, 0R6586, 166321, 199296, 197396 | Caterpillar 180K-Excavator with 3116 DIT, 3116 TA Engine Caterpillar 213/214-Excavator with 3116 DIT, 3116 TA Engine |
| UTV7507 | 466869-5002S 466869-0002, 466869-9002, 124-7622, 122-7622, 0R6994 | Caterpillar Earth Moving with 3406 DITAJWAC 144 Industrial |
View all specs in our Caterpillar Industrial Turbocharger Catalog.
A: Technically, they are the same specification. 7N7748 is the Caterpillar number for a new unit, while 0R5807 is the Caterpillar Reman (remanufactured) number. Our Ruich Value 3LM-373 is a brand-new aftermarket replacement that interchanges with both.
A: No. While the 3304 is essentially a 4-cylinder version of the 3306, the airflow requirements are different. Using this 3LM-373 on a 3304 would result in turbo surge and poor performance. Please contact us for the specific 3304 turbo.
A: Yes. It is critical to pour clean engine oil into the oil inlet port of the 7N7748 turbo and spin the compressor wheel by hand before connecting the oil feed line. This prevents “dry start” damage to the bearings during the first few seconds of engine operation.
We also supply repair kits, nozzles, and cartridges for bulk fleet maintenance orders.
Email: [email protected]
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For Any Inquiries, please feel free to contact us, Our sales teams are always glad to support your business