Ford New Holland 7840O Tractor Parts
7840O parts and accessories
The Ford New Holland 7840O tractor, manufactured from 1992 to 1996, was a popular choice for farmers due to its reliable performance and versatile capabilities. Powered by a robust Ford 4.5L diesel engine producing around 95 horsepower, the 7840O delivered approximately 80 PTO horsepower. Its robust build and ease of operation made it a workhorse on many farms.
The Ford New Holland 7840O was part of the highly successful 40 Series tractor line introduced in the early 1990s. This model, produced between 1992 and 1996, was designed to provide a balance of power and maneuverability for a variety of agricultural tasks. It features a Ford 4.5L (274 cubic inch) inline 4-cylinder diesel engine that delivers approximately 95 engine horsepower. The transmission options included a standard 12x12 Synchro Shift transmission, providing a good range of speeds for different field conditions, or an optional Dual Power transmission. The PTO delivers around 80 horsepower and is available in both 540 and 1000 RPM configurations. Hydraulically, the 7840O offers a flow rate of approximately 17 GPM with typically two remote valves. It features a Category II 3-point hitch. Common applications for the 7840O include row crop work, hay production, livestock operations, and light tillage. What distinguished the 7840O from other models in the lineup was its optimal blend of power and size, making it suitable for farms of various sizes and operational needs.
Specifications
| Engine | Ford 4.5L 95 HP Diesel |
|---|---|
| PTO HP | 80 HP @ 540/1000 RPM |
| Transmission | 12x12 Synchro Shift or Dual Power |
| Hydraulics | 17 GPM, 2 remotes |
| 3-Point Hitch | Category II, 4762 lbs lift capacity |
| Fuel Capacity | 32 gallons |
| Weight | 8185 lbs |
| Years Produced | 1992-1996 |
Maintenance Tips
- Change the engine oil and filter every 250 hours using a high-quality oil that meets Ford's specifications. Regularly inspect the air filter and clean or replace as needed.
- Inspect hydraulic fluid levels and condition regularly. Change the hydraulic fluid and filter every 1200 hours to maintain optimal performance and prevent damage to hydraulic components.
- Use clean, high-quality fuel and add a fuel stabilizer during seasonal storage to prevent fuel degradation and injector clogging. Drain any water from the fuel/water separator regularly.
- Before storing the tractor for an extended period, perform a full service, including lubricating all grease points, checking coolant levels, and disconnecting the battery to prevent discharge. Store the tractor in a dry, covered area.
History & Background
The Ford New Holland 7840O was introduced in 1992 as part of the updated 40 Series. It built upon the success of previous Ford tractor models, incorporating improvements in engine technology and transmission options. The 7840O played a significant role in modernizing agricultural practices by offering a reliable and versatile machine for various farming tasks.
Frequently Asked Questions
What engine is in the Ford New Holland 7840O?
The Ford New Holland 7840O is equipped with a Ford 4.5L (274 cubic inch) inline 4-cylinder diesel engine, producing approximately 95 horsepower.
What is the PTO horsepower on a 7840O?
The Ford New Holland 7840O delivers around 80 PTO horsepower. It is available in both 540 and 1000 RPM configurations.
What oil filter fits the 7840O?
The recommended oil filter for the Ford New Holland 7840O is a Ford E6NN6714AA or equivalent. Common cross-references include Fram PH3600, Wix 51773, and Baldwin B1421.
What are common parts needed for the 7840O?
Common wear parts for the Ford New Holland 7840O include engine oil filters, fuel filters, air filters, hydraulic filters, belts (fan, alternator), hydraulic seals, steering components (tie rod ends, ball joints), and clutch parts. Regular inspection and replacement of these parts can help maintain the tractor's performance and longevity.

9968062 - MFWD Sun Gear Spacer
SKU: 9968062
12 in stock

9968059 - Cross & Bearing Kit
SKU: 9968059
116 in stock

9968025 - MFWD Lower Kingpin
SKU: 9968025
3 in stock

9968023 - MFWD Upper Kingpin
SKU: 9968023
2 in stock

9966308 - Thrust; MFWD Plate
SKU: 9966308
8 in stock

87361037 - MFWD Drive Shaft Spider
SKU: 87361037
23 in stock

87316431 - RH/LH Spindle
SKU: 87316431
99 in stock

86511345 - O-Ring
SKU: 86511345
16 in stock

85807964 - Drive Shaft Front Axle Oil Seal
SKU: 85807964
11 in stock
83992409 - BEARING
SKU: 83992409
184 in stock

83948358 - Front Wheel Seal
SKU: 83948358
742 in stock

83930554 - Front & Rear Axle (MFWD) Bushing
SKU: 83930554
15 in stock
83910701 - SUB TO VLG3307
SKU: 83910701
390 in stock

83903309 - Spindle Bushing
SKU: 83903309
85 in stock

83424343 - Steering Gear (Pk/20) Ball Bearing
SKU: 83424343
260 in stock

81870291 - Valve; 4WD Engage Solenoid
SKU: 81870291
3 in stock

81869701 - Power Steering Cylinder Assembly
SKU: 81869701
10 in stock

81863173 - MFWD Upper Kingpin
SKU: 81863173
10 in stock

81862946 - MFWD Planetary Sun Gear
SKU: 81862946
2 in stock

81816580 - SUB TO SD12
SKU: 81816580
1240 in stock

81815739 - Wheel (1/2-20) Nut
SKU: 81815739
740 in stock

81803420 - Cup; MFWD Wheel Hub Inner Bearing
SKU: 81803420
44 in stock

81803413 - Cone; MFWD Wheel Hub Inner Bearing
SKU: 81803413
44 in stock

528803R1 - STUD BOLT 1/2" X 2" (10/PACK)
SKU: 528803R1
1220 in stock
