Black drive belt on white background
Black drive belt on white background

A36/4L380 HVAC V-Belt — Replaces Lennox 25P05, Greenheck 345040

Price
$32.99

Frequently Bought Together

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BELT SLIPPING, SQUEALING OR WORN?

A36/4L380 HVAC V-Belt — Restores Blower Speed & Airflow

38-inch outside-length, 1/2-inch wrapped drive belt with verified OEM and manufacturer cross-reference data.

A36 / 4L38038" Outside Length1/2" Top Width40° Profile
Equipment Fitment: No trustworthy model-level fitment list was published in the audited sources. Match the original A36/4L380 marking, 1/2-inch profile and 38-inch outside length.

Verified Cross-Reference Information

Industry NumbersA36, 4L380
Lennox Numbers66N26; superseded by 25P05
Greenheck345040 (A36), 345065 (4L380)
Gates ClassicalA36, 9002-2036
Gates FHP6838 / 4L380K

Equivalent vs. Alternative Belts

Dimensional FHP EquivalentGates 6838 / 4L380K
Cogged Performance AlternativeAX36 — raw-edge cogged construction; not identical to a wrapped A36/4L380

Important: A belt can share the same nominal size while using a different cover, cord, compound or cogged construction. Match the original duty requirement as well as the section and length.

Size & Application Data

Outside Length38" / 965 mm
Top Width1/2" / 12.7 mm
Nominal HeightApproximately 5/16" to 11/32", depending on manufacturer specification
Typical UsesHVAC blowers, rooftop units, ventilation fans, air handlers, pumps and industrial drives

Common Problems This Belt May Correct

  • Startup squeal, chirp or belt slip
  • Weak airflow or a blower running below normal speed
  • Black belt dust around the sheaves
  • A cracked, glazed, stretched, frayed or hardened belt

Check Before Ordering

  • Read the complete number printed on the old belt whenever possible.
  • Confirm the 1/2-inch A/4L profile and 38-inch outside-length designation.
  • Inspect both sheaves for worn, widened, polished or damaged grooves.
  • Check shaft alignment, bearing drag and the tensioning system.
Pro Tip: A new belt will not permanently stop noise caused by worn sheaves, misalignment or failing bearings. Correct the drive problem first, then set final tension to the equipment specification.

Installation Notes

  1. Disconnect and lock out electrical power.
  2. Release belt tension according to the service instructions.
  3. Do not pry the belt over a pulley; create enough slack.
  4. Clean and align the sheaves, then set specified tension.
  5. Rotate by hand, reinstall guards, restore power and test.

Frequently Asked Questions

Are A36 and 4L380 interchangeable?
They are commonly paired as the same nominal 1/2-inch, 38-inch size. Construction and duty rating can still differ by product line.

Can AX36 replace this belt?
AX36 is a related cogged performance alternative, not identical wrapped construction. Verify the equipment permits the change.

✓ Model-Specific Repair Pages

Frigidaire 1 Dishwasher Parts & Repair Guide

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Kitchener, Ontario N2E 1W8
Phone
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What Customers Say

4.70 ★ (288)
Verified

All brand names are the property of their respective owners and are used for compatibility reference only.

Exact and OEM references: A36, 4L380, Lennox 66N26, Lennox/Browning 25P05, Greenheck 345040, Greenheck 345065, Gates A36, Gates 9002-2036. Dimensional FHP equivalent: Gates 6838 / 4L380K. Performance alternative: AX36 raw-edge cogged; not identical construction.

For other equipment, match by A36/4L380 marking, 1/2-inch width and 38-inch outside length.