Engine
| Displacement | 4.5 L |
|---|---|
| Aspiration | Naturally aspirated |
This engine also powers 2 generator set(s) on Facts About Generators.
Parts
41| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 11-21011 | Gasket, Intake Port | 1 | Gasket | PartsGeek |
| 11-31012 | Gasket | 1 | Gasket | PartsGeek |
| 11-31031 | Gasket, Turbo Oil Return | 1 | Gasket | PartsGeek |
| 11-31094 | Gasket | 1 | Gasket | PartsGeek |
| 11-31099 | Gasket | 1 | Gasket | PartsGeek |
| 11-31401 | Gasket, K26 Turbo Mounting | 1 | Gasket | PartsGeek |
| 11-31615 | Gasket, Turbo/Exhaust Mtg. | 1 | Gasket | PartsGeek |
| 15-09501 | Sealing Washer, Copper M22 | 1 | Gasket | PartsGeek |
| 16-01000 | O-ring | 1 | Seal | PartsGeek |
| 16-09503 | O-ring | 1 | Seal | PartsGeek |
| 16-21001 | O-Ring | 2 | Seal | PartsGeek |
| 18-11003 | Hose, 1-1/4" ID x 2-1/2" 2 Ply | 1 | Hose | PartsGeek |
| 18-11010 | Hose, 3/4" I.D. x 1-1/4" | 1 | Hose | PartsGeek |
| 18-21004 | Hump Hose | 1 | Hose | PartsGeek |
| 18-21014 | Hose, 2" I.D. x 2-3/8" | 1 | Hose | PartsGeek |
| 18-21016 | Hose, 2" I.D. x 1-3/4" 3 Ply Silicone | 1 | Hose | PartsGeek |
| 18-31605 | Hose, 1-1/4 x 32" Wire Reinforced | 1 | Hose | PartsGeek |
| 24-21000 | Air Filter | 1 | Air filter | PartsGeek |
| 24-21003 | Air Filter | 1 | Air filter | PartsGeek |
| 37-11006 | Flow Switch 6 GPM 1 -1/4 NPT (Propulsion Units) | 1 | Sensor | PartsGeek |
| 51M7040 | O-ring | 1 | Seal | PartsGeek |
| R123353 | Gasket, Engine Oil Pan | 1 | Gasket | PartsGeek FridayParts $53.99 |
| R123439 | Drive Belt, LP-MP445D (non-turbo) | 1 | Belt | PartsGeek FridayParts $49.99 |
| R123440 | Drive Belt, LP-M445T-H (with turbo) | 1 | Belt | PartsGeek |
| R123457 | Drive Belt, LP-MP445T-H (with turbo) | 1 | Belt | PartsGeek |
| R123461 | Drive Belt, LP-MP445D (non-turbo) | 1 | Belt | PartsGeek |
| R128799 | O-ring | 1 | Seal | PartsGeek |
| R502076 | O-ring (replaces R89944) | 1 | Seal | PartsGeek |
| R51936 | Tube Seal | 9 | Seal | PartsGeek FridayParts $17.68 |
| RE48786 | Fuel Injector (with turbocharger, includes keys 2-3) | 4 | Injector | PartsGeek FridayParts $149.99 |
| RE502711XD | 12 Volt Standard Ground | 1 | Pump | PartsGeek |
| RE502715XD | 24 Volt Standard Ground | 1 | Pump | PartsGeek |
| RE60062 | Fuel Injector (without turbocharger, includes keys 2-3) | 4 | Injector | PartsGeek |
| RE64133XD | 12 Volt Standard Ground | 1 | Pump | PartsGeek |
| SP10 | Change secondary fuel filter | 1 | Fuel filter | PartsGeek FridayParts $279.00 |
| SP12 | Check fuel injection pump | 1 | Injector | eBay PartsGeek |
| SP13 | Check fuel injection pump | 1 | Fuel injection pump | eBay PartsGeek |
| SP19 | Change impeller in raw water pump | 1 | Impeller | eBay PartsGeek |
| SP23 | Check state of charge of batteries | 1 | Clutch and pto service | eBay $60.00 PartsGeek |
| SP15 | Check and flush cooling system | 1 | Service part / kit | eBay $20.74 PartsGeek |
| SP18 | Check and clean gear oil cooler | 1 | Service part / kit | eBay PartsGeek |
Service & wear parts shared with every machine that uses this engine. Confirm the exact part for your serial number.
Aftermarket parts that fit this tractor
106D-9907 PartsGeek 650B PartsGeek 660B PartsGeek 666B PartsGeek 768B PartsGeek 769B PartsGeek 5D-0470 PartsGeek 966D PartsGeek 980B PartsGeek 980C PartsGeek
Parts listed by aftermarket suppliers as fitting this tractor — leads compiled from supplier catalogs; verify the exact part for your serial number.
Common questions
What engine does the Caterpillar 666B use?
The Caterpillar 666B tractor is powered by the John Deere Powertech 4045 engine.
About
Caterpillar 666B — tractor. Specifications and parts compiled from manufacturer documents.