Case IH 303 Combine Parts
The Case IH 303 combine, manufactured in the late 1970s, was a popular choice for farmers seeking a reliable and efficient machine for grain harvesting. Powered by an engine offering around 100 horsepower, it handled a variety of crops. Available with header widths up to 15 feet and utilizing a conventional separator system, the 303 was well-regarded for its simplicity and ease of maintenance.
The Case IH 303 was a workhorse combine produced in the late 1970s. It was built for smaller farms that did not need the capacity of larger, newer machines. The 303 was powered by a Case or Cummins diesel engine, offering approximately 100 horsepower with a displacement around 300-350 cubic inches. It utilized a conventional threshing system with a cylinder and concave for separating grain from the plant material. The grain tank typically held around 80-100 bushels, unloading at a rate of approximately 25-35 bushels per minute. Header widths ranged from 13 to 15 feet, suitable for small to medium-sized fields. The 303 offered a basic cab for operator comfort and protection. It was known for its effectiveness in harvesting wheat, soybeans, and other small grains, and also could handle corn with the appropriate header. While lacking the advanced features of later models, the Case IH 303 provided a dependable and cost-effective harvesting solution for many farmers.
Specifications
| Engine | Case/Cummins 100 HP Diesel |
|---|---|
| Separator Type | Conventional - Cylinder and Concave |
| Grain Tank | 80-100 bushels |
| Unloading Rate | 25-35 bu/min |
| Header Widths | 13-15 ft |
| Fuel Capacity | Unknown gallons |
| Weight | Unknown lbs |
| Years Produced | Late 1970s |
Maintenance Tips
- Concave Adjustment: Regularly check and adjust the concave clearance according to the crop being harvested. Proper concave setting is crucial for effective threshing and minimizing grain damage.
- Belt and Chain Tension: Inspect all belts and chains for wear and proper tension. Loose belts and chains can cause slippage, reducing efficiency and potentially leading to component failure.
- Sieve and Chaffer Cleaning: Clean the sieves and chaffer frequently to remove debris and ensure proper separation of grain from chaff. Clogged sieves can result in grain loss.
- Bearing Greasing: Regularly grease all bearings according to the manufacturer's recommendations. Proper lubrication is essential for extending the lifespan of bearings and preventing costly breakdowns.
History & Background
The Case IH 303 was introduced in the late 1970s as a mid-sized combine option. It represented a continuation of Case IH's commitment to providing farmers with reliable and practical harvesting equipment. While not revolutionary in design, the 303 filled an important niche in the market.
Frequently Asked Questions
What engine is in the Case Ih 303?
The Case IH 303 typically features a Case or Cummins diesel engine producing around 100 horsepower, with a displacement in the 300-350 cubic inch range.
What is the grain tank capacity on a 303?
The grain tank capacity of the Case IH 303 is approximately 80-100 bushels, with an unloading rate of about 25-35 bushels per minute.
What type of separator does the 303 have?
The Case IH 303 utilizes a conventional separator system, consisting of a cylinder and concave arrangement for threshing and separating grain.
What are common parts needed for the 303?
Common parts needed for the Case IH 303 include concaves, rasp bars, belts, chains, bearings, auger fingers, and sickle sections. These components are subject to wear and tear during normal operation and may require periodic replacement.

122056 - O-Ring
SKU: 122056
71 in stock

116210 - Cup; Lower Unloading Gearbox Bearing
SKU: 116210
97 in stock

9672548 - O-Ring
SKU: 9672548
351 in stock

911776R3 - Valve (0.999") Tappet
SKU: 911776R3
191 in stock

834831M1 - Front Crankshaft Seal
SKU: 834831M1
38 in stock

538983R1 - Rear Crankshaft Seal
SKU: 538983R1
11 in stock

4A721 - Rear Crankshaft Seal
SKU: 4A721
11 in stock

49886 - O-Ring
SKU: 49886
64 in stock

41339D - Valve Keeper
SKU: 41339D
2798 in stock

382360R91 - set of 4) Main (.010" Bearing Set
SKU: 382360R91
29 in stock

376666R11 - Connecting Rod (.010") Bearing
SKU: 376666R11
26 in stock

372699R3 - Exhaust Valve
SKU: 372699R3
96 in stock

369984R1 - Pan Gasket
SKU: 369984R1
38 in stock

367632R11 - Connecting Rod (.002") Bearing
SKU: 367632R11
23 in stock

367631R11 - Connecting Rod (.030") Bearing
SKU: 367631R11
12 in stock

367408R11 - Connecting Rod (Std) Bearing
SKU: 367408R11
133 in stock

367229R1 - Camshaft
SKU: 367229R1
103 in stock

367192R1 - Valve Spring
SKU: 367192R1
174 in stock

364913R1 - Connecting Rod Bushing
SKU: 364913R1
26 in stock

23995DC - Fuel (Vented) Cap
SKU: 23995DC
369 in stock

237248R1 - Valve Guide
SKU: 237248R1
54 in stock

234276R1 - Intake Valve
SKU: 234276R1
53 in stock

234275R1 - Intake Valve
SKU: 234275R1
10 in stock

D16 - Spark Plug
SKU: D16
180 in stock
