Gates 2/9730PB accessory drive belt for the 1989-1991 Mack RB 6-cylinder 11.0L, the 1990-1993 RB 6-cylinder 11.9L and other vehicles joins two V-belt strands into one unit that drives the fan and alternator. The Green Stripe PowerBand design is made for heavy-duty, high-vibration drives that call for belt sets.
- Green Stripe PowerBand: V-belt strands joined by a permanent, high-strength tie band, with a secure strand fit in each pulley groove
- Unique tensile cord design adds strength, flexibility and shock-load resistance
- Molded notches reduce bending stress on small-diameter pulleys and dissipate heat
- Even load distribution between strands absorbs shock loads
- Eliminates belt turnover and belts jumping off the drive
- Meets or exceeds SAE J636 specifications and meets RMA oil and heat resistant standards and static conductivity requirements
Quick facts
- Part: Gates 2/9730PB accessory drive belt
- Fits: the 1989-1991 Mack RB 6-cylinder 11.0L, the 1990-1993 RB 6-cylinder 11.9L and other vehicles
- Position: Fan and alternator
- Material: EPDM belt, polyester cord
- Condition: New
Cracks, fraying or a squeal from the drive can mean the belt is worn, and with the engine off and cool you can look the belt over for cracks and fraying. A pulley that is worn or out of line can make noise too, so these signs alone do not prove the belt is the problem.
Fits
The belt is listed for a wide range of Mack truck models, including the 1989-1993 Mack RB Series and the 1989-1991 Mack CH 6-cylinder 11.0L and the 1989-1996 CH 6-cylinder 11.9L. A 1989-1993 Mack RB Series takes one belt. If your Mack is not named here, look up its model and year in the "Vehicles it fits" section.
Specifications
Fit and size
- Position: Fan and alternator
- Quantity per vehicle: 1
- Strands: 2
- Cross section: HC50
- Top width: 1.125 in (28 mm), 0.5 in (13 mm) per strand
- Outside circumference: 73.99 in (1879 mm)
- Effective length: 73.11 in (1857 mm)
Build and materials
- Type: High capacity joined V-belt, notched
- Belt material: EPDM
- Cord material: Polyester
- Condition: New
- Country of origin: United States
Interchange: 25-18555-2 · 25-9730-2
2T17730 · 2B17730 · 88GB437P13 · 88GB439P732 · 88GB445P730
Product information is for general reference and may contain errors. See our Disclaimer.
This part cross-references / interchanges with the following part numbers:
2T17730, 2B17730, 88GB437P13, 88GB439P732, 88GB445P730, 25-18555-2, 25-9730-2
Frequently Asked Questions
Is the Gates 2/9730PB belt right for the 1989-1991 Mack RB 6-cylinder 11.0L?
Yes. Gates 2/9730PB is listed for the 1989-1991 Mack RB 6-cylinder 11.0L, the 1990-1993 RB 6-cylinder 11.9L and the 1989-1993 Mack RB Series. Each takes one belt.
Is this Gates accessory drive belt one belt or two separate V-belts?
It is one joined belt. Two V-belt strands are tied together by a permanent, high-strength tie band and work as a single unit.
What size is the Gates 2/9730PB notched joined V-belt?
Gates 2/9730PB has an outside circumference of 73.99 in (1879 mm), an effective length of 73.11 in (1857 mm) and a top width of 1.125 in (28 mm). Its cross section is HC50.
How can I tell if this joined V-belt is worn?
Look for cracks, fraying or a squeal from the drive. Inspect the belt only with the engine off and cool.
What do the molded notches on this belt do?
The molded notches reduce bending stress, especially on small-diameter pulleys, and help dissipate heat.
