B77/5L800 V-Belt — Restores Fan, Blower & Pump Drive
Wrapped classical B-section drive belt with verified Gates and Timken references plus clearly separated FHP and cogged alternatives.
Verified Cross-Reference Information
Exact classical references: B77, Gates B77, Gates 9003-2077, Timken B77, Timken BP77.
Timken published outside circumference: 80.4 inches. This is a manufacturer-specific published value.
Dimensional FHP alternative: 5L800. Related size only; not identical construction or service rating.
Cogged performance alternative: BX77. Raw-edge cogged construction; not an exact wrapped-belt match.
Size & Construction
Classical B section, 21/32-inch top width, approximately 13/32-inch height and 40-degree profile.
Common Problems
- Belt slip, squeal or chirp
- Reduced fan, blower or pump speed
- Weak airflow or black belt dust
- Cracking, glazing, stretching or fraying
Check Before Ordering
Confirm the complete B77 marking, the 21/32-inch B profile and the supplying manufacturer's length specification. Published inside, datum and outside lengths vary by manufacturer and measurement method.
Installation
Lock out power, relieve tension, inspect and clean sheaves, install without prying, align the drive, set manufacturer-specified tension, rotate by hand, reinstall guards and test.
Verified Compatible Equipment Models
No reliable model-level fitment was verified for this universal B-section size. Match by exact designation, profile and manufacturer length specification.
FAQ
Is 5L800 exact? No. It is a dimensional FHP alternative. Is BX77 exact? No. It is a cogged performance alternative.
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Kitchener, Ontario N2E 1W8
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