Ford B-700 (1980-1994) Accessory Drive Belt Replacement Guide
Keep your bus on the road by understanding which accessory drive belt your 1980-1994 Ford B-700 needs.
- First, identify if your B-700 uses a single serpentine belt or multiple V-belts, as this changes which parts you need.
- Inspect belts for cracks, fraying, or noise; replace them proactively to avoid a breakdown.
- Gates, Dayco, and Continental are all reliable aftermarket brands for this part.
- If you have a serpentine belt, consider replacing the tensioner and idler pulleys at the same time for best results.
Understanding Your B-700's Belt System: V-Belt vs. Serpentine
The 1980-1994 production run for the Ford B-700 spanned a major change in automotive belt technology. It is critical to identify which system your bus uses before ordering parts.
- Multiple V-Belts: Common on earlier models in this date range, this system uses several individual belts, each potentially driving one or two accessories. If one belt breaks, you might only lose power to one component, but the remaining belts could be compromised.
- Single Serpentine Belt: Found on later models, this system uses one long, wide, ribbed belt that snakes around all the accessory pulleys. These systems use an automatic tensioner to maintain pressure. While more reliable, if a serpentine belt fails, all accessories stop working at once.
Choosing the Right Aftermarket Belt Brand
For a workhorse vehicle like a B-700, belt quality is important. The original Ford belts were durable, but modern aftermarket belts from reputable brands meet or exceed those original standards. Gates, Dayco, and Continental are all established manufacturers that supply parts directly to automakers.
- Top Tier (Good): Gates is widely regarded as a top-quality aftermarket brand and is a known OEM supplier for Ford. They have a strong reputation for durability and fitment.
- Reputable Alternatives (Good): Dayco and Continental are also excellent choices and major OEM suppliers. While some online forums show mixed individual experiences, both brands produce millions of reliable belts using modern EPDM rubber compounds that resist noise and wear.
For a vehicle like the B-700, any of these three brands will provide a reliable replacement part. The choice often comes down to price and availability. A forum user with a similar Ford medium-duty truck noted that belts "like to break" and recommended carrying a spare set, which is wise advice for any commercial vehicle.
Known Issues, Recalls, or TSBs
Searches of the National Highway Traffic Safety Administration (NHTSA) database and other sources show no specific accessory drive belt recalls or Technical Service Bulletins (TSBs) for the 1980-1994 Ford B-700. Any belt-related issues would likely fall under general wear and tear for a vehicle of this age.
Estimated Costs for Accessory Drive Belt Replacement
| Part Type | Estimated Cost |
|---|---|
| New Aftermarket Belt(s) | $7.35 - $86.78 (Price varies based on V-belt or serpentine, and engine type) |
| Shop Labor | $75 - $150 (Depending on engine access) |
Frequently Asked Questions (FAQ)
How often should I replace the accessory drive belt?
For a vehicle of this age, there is no strict mileage interval. The best practice is to inspect the belts regularly (at every oil change). Replace them if you see multiple cracks in the ribs, fraying, glazing (a shiny, smooth surface), or if they are contaminated with oil or coolant.
Should I replace the belt tensioner at the same time?
If your B-700 has a serpentine belt, it also has an automatic tensioner. It is highly recommended to replace the tensioner and any idler pulleys at the same time as the belt. A weak or failing tensioner is a primary cause of belts coming off or wearing out prematurely.
What is the difference between a serpentine belt and a V-belt?
A serpentine belt is a single, wide, flat belt with multiple ribs that drives all engine accessories. A V-belt is a narrower belt with a V-shaped profile, and older vehicles often use multiple V-belts to run different accessories. Your B-700 could have either system depending on its year and engine.
Why is my new belt squealing?
Squealing after a new belt installation is often not the fault of the belt itself. The most common causes are a weak tensioner that isn't providing enough pressure, misaligned pulleys, or a worn pulley bearing on an accessory like the alternator or water pump. Oil or coolant leaking onto the belt can also cause it to slip and squeal.
Technical Specifications
Belt type (V-Belt or Serpentine), length, and rib count must match the specific engine (e.g., Ford 6.6L/7.8L diesel, gasoline V8) and accessory configuration of your vehicle.
We Have This Part in Stock
The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
- Ford B-700: