TRW LB12 1960s–1970s GM inline-4 and inline-6 engines Toro, MTD, Murray (early models)
type: Unknown Type
Vendor: CorvairFarmer
Description:
“It’s not timing. It’s torque.”
TRW LB12 — a classic V-belt built for the machines that never quit. Whether you're restoring a 1960s GM inline-six, tuning a vintage alternator bracket, or keeping your mower alive, this belt delivers the grip, stretch resistance, and quiet confidence of old-school engineering.
🔧 33 inches of polyester-corded resolve. 🕰️ NOS boxed or fresh-cut — your choice. 📦 Ships fast from Ravenel, SC. Satisfaction guaranteed or your silence back.
🔧 TRW LB12 — Technical Overview
| Attribute | Spec |
|---|---|
| Type | Conventional V-Belt (Accessory Drive) |
| Belt Section | A/4L (Classic VBG profile) |
| Top Width | 0.5" (12.7mm) |
| Depth | ~0.3125" (7.94mm) |
| Outside Circumference | ~33" (838mm) |
| Material | Neoprene rubber with polyester cord |
| Application | Accessory drive belt for alternator, fan, or power steering on select vintage vehicles and equipment |
🚗 Verified Fitment
This belt is not used for engine timing. It fits accessory drive systems such as:
| Equipment Type | Example Models |
|---|---|
| Automotive | 1960s–1970s GM inline-4 and inline-6 engines (fan or alternator belt) |
| Industrial | Small compressors, pumps, HVAC units |
| Lawn & Garden | Toro, MTD, Murray (early models) |
🔍 Always confirm pulley diameter, center-to-center distance, and belt section before install. LB12 is not interchangeable with timing belts or serpentine belts.
🔁 Cross-Reference Numbers
| Brand | Equivalent Part Number |
|---|---|
| Gates | 6933, 6933XL |
| Dayco | 6933 |
| Goodyear | 6933 |
| NAPA | NBH 6933 |
| Pix Belts | A33 |
| Carlisle | 13A33 |
| Stens | 248-033 |
| Rotary | 9330 |
