Case IH 1666 Combine Parts
1666 parts and accessories
The Case IH 1666 combine, manufactured from 1985-1992, was a popular choice for farmers seeking a reliable and versatile machine. Boasting a robust 165 HP engine and available header widths up to 30 feet, the 1666 utilized a conventional cylinder/walker separation system. Its reputation for simplicity and durability made it a workhorse in grain harvesting operations.
Introduced in 1985, the Case IH 1666 was a mid-sized combine designed to offer a balance of performance and affordability. Powering the 1666 was an International Harvester DT-402 naturally aspirated diesel engine, producing 165 horsepower with a displacement of 402 cubic inches. The combine features a conventional threshing system with a 30-inch diameter cylinder and six straw walkers for separation. Its grain tank held approximately 185 bushels, and unloading speeds reached around 80 bushels per minute. Available header widths ranged from 13 to 30 feet, accommodating various field sizes and crop types. Optional features included a straw chopper or spreader, and the cab offered basic operator comfort with controls for machine functions. The Case IH 1666 performed exceptionally well in harvesting wheat, soybeans, corn, and other small grains, gaining a reputation for its dependability and ease of maintenance.
Specifications
| Engine | International Harvester DT-402 165 HP 402ci Diesel |
|---|---|
| Separator Type | Conventional - 30-inch Cylinder |
| Grain Tank | 185 bushels |
| Unloading Rate | 80 bu/min |
| Header Widths | 13-30 ft |
| Fuel Capacity | 95 gallons |
| Weight | 17,500 lbs |
| Years Produced | 1985-1992 |
Maintenance Tips
- Regularly inspect and adjust the concave clearance to optimize threshing performance and minimize grain loss.
- Check and maintain proper tension on all belts and chains, replacing them as needed to prevent breakdowns during harvest.
- Clean the sieves and chaffer frequently to remove debris and ensure efficient grain separation.
- Grease all bearings according to the manufacturer's recommendations to prevent premature wear and extend component life. Consider performing pre-season bearing maintenance.
History & Background
The Case IH 1666 was introduced in 1985 as part of the 1600 series combines. It offered a blend of traditional combine design with improvements in capacity and efficiency over previous models. The 1666 played a significant role in providing farmers with a reliable harvesting solution during its production years.
Frequently Asked Questions
What engine is in the Case Ih 1666?
The Case IH 1666 is powered by an International Harvester DT-402 naturally aspirated diesel engine producing 165 horsepower with a displacement of 402 cubic inches.
What is the grain tank capacity on a 1666?
The Case IH 1666 has a grain tank capacity of approximately 185 bushels, with an unloading rate of about 80 bushels per minute.
What type of separator does the 1666 have?
The Case IH 1666 utilizes a conventional threshing system. It has a 30-inch diameter cylinder and six straw walkers for separation.
What are common parts needed for the 1666?
Common wear parts for the Case IH 1666 include concaves, rasp bars, belts, chains, bearings, auger fingers, and sickle sections. Regular replacement of these parts is essential for maintaining optimal performance.

1347494C1 - Unloader Belt Drive Shaft
SKU: 1347494C1
16 in stock

1347432C2 - Lower Unloading Gearbox Seal
SKU: 1347432C2
151 in stock

1347402C1 - Unloader Drive (Lower) Sprocket
SKU: 1347402C1
13 in stock

1347399C1 - Unloader Drive Plate
SKU: 1347399C1
54 in stock

1347389C1 - Vertical Unloading Auger
SKU: 1347389C1
35 in stock

1347384C1 - Grain Tank Unloading Sprocket Bushing
SKU: 1347384C1
77 in stock

1347360C1 - Grain Tank Unloader Drive Sprocket
SKU: 1347360C1
107 in stock

1347260C1 - 18T Upper Unloading Gearbox Pinion
SKU: 1347260C1
16 in stock

1345472C1 - Tailings Elevator Drive Sprocket
SKU: 1345472C1
34 in stock

1327668C1 - Grain Auger Trough Tube Support
SKU: 1327668C1
9 in stock

1324840C1 - Tailings Auger Bearing Hub
SKU: 1324840C1
33 in stock

1321560C3 - Upper Grain Elevator Head Tube
SKU: 1321560C3
27 in stock

1321557C2 - Clean Grain Auger Trough Tube
SKU: 1321557C2
15 in stock

1321552C2 - Front Inclined Grain Elevator Head Support
SKU: 1321552C2
11 in stock

1321551C2 - Inclined Rear Support; Grain Elevator Head Panel
SKU: 1321551C2
3 in stock

1321347C1 - Grain Elevator Shaft-Drive
SKU: 1321347C1
18 in stock

1321334C92 - Clean Grain Elevator Chain
SKU: 1321334C92
45 in stock

1321130C1 - Grain Auger Trough
SKU: 1321130C1
5 in stock

1321126C1 - Horizontal Grain Head Elevator; RH Side
SKU: 1321126C1
Out of stock

1321039C1 - Grain Elevator Sprocket
SKU: 1321039C1
18 in stock

1319908C1 - Elevator Head (RH) Side
SKU: 1319908C1
3 in stock

1319901C1 - Side Head (LH)
SKU: 1319901C1
26 in stock

1319759C1 - Clean Grain Elevator Idler Sprocket
SKU: 1319759C1
268 in stock

1318912C3 - Grain Delivery; 1 1/4" Shaft Auger
SKU: 1318912C3
23 in stock
