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Caterpillar 3126 Reman Long Block Supreme | 64F8M072BSB

Caterpillar 3126 Reman Long Block Supreme | 64F8M072BSB

SKU: 64F8M072BSB
Starting from...
$11,14469
+$2,250.00 Core Charge* *See Item Specifics below for core return criteria, if any.

These engines are custom-built to match your exact application and serial number. Price and lead times will vary.

Call 800-828-6943 or use the chat link below for an exact quote matching your ESN and application.

Condition: Remanufactured
Cross-References: 64F8M072BSB
The RF Engine Advantage
Family Operated Since 1975

Original Equipment Quality

Parts that meet or exceed OEM specifications. Guaranteed performance you can trust. Reliability built into every component.

100+ Years of Expertise

A century of collective diesel knowledge and 10+ acres of engines and engine parts, we are more than just an online reseller or call center. We know heavy-duty diesel.

Here for the Long Haul

Same location and same phone number for the last 50 years. Same commitment to getting you the right parts at the right price.

New, Reman, & Used

RF Engine offers an expansive offering of new aftermarket, remanufactured, and used engines and engine parts all under one roof.

Details

3126 Long Block Supreme

Built to the Highest Standards

  • Every engine is completely disassembled.
  • All components cleaned and detailed.
  • All major components are machined to meet or exceed OE specifications.
  • Wear parts are replaced with 100% new.
  • Fuel Systems and Turbochargers are remanufactured and tested.
  • Long block and long block supremes are SIM tested.
  • All Drop-In engines are dyno tested on electronically controlled dynamometers.
  • Finally painted, packed and prepped for delivery.

Engine Testing: Complete Drop-In

Complete Drop-In engines are 100% dyno tested before shipment. Computer controls ensure that each engine dyno test is conducted under standard, repeatable settings. Every engine is run through a warm-up cycle; three separate cruise segments simulating light, medium, and heavy throttle conditions; maximum torque and horsepower tests; both high and low idle tests; and a black light leak detection test with dyed oil, coolant, and fuel.

Engine Testing: Long Block

Every Long Block and Long Block Supreme is SIM (simulation) tested for performance using an outside power source to rotate the Long Block or Long Block Supreme at approximately 700-800 RPMs. This allows each unit to be tested for cylinder compression, rotational torque, oil pressure, coolant pressure, noises, and interference. Units are checked with a black light to ensure no leaks. The unit is not under its own power or running on fuel at this point.


Core Return Criteria

  • 100% visual inspection
  • If there are visible holes or cracks in the block there is a 50% core charge back
  • No hidden costs or crank rotation required

Warranty Information

REMANUFACTURED ENGINE LIMITED WARRANTY

WARRANTY COVERAGE PERIODS

Diesel Engines

Product Application Coverage
Complete Drop-In On Highway 2 Years / Unlimited Miles – Parts & Labor
Motorcoach / Motorhome 1 Year / Unlimited Miles – Parts & Labor
Off Highway / Industrial / Marine 1 Year / Unlimited Hours – Parts & Labor
Long Block Supreme / Long Block / Basic Long Block All Applications 1 Year / Unlimited Miles/Hours – Parts & Labor
Transit Bus 1 Year / 1,000 Hours – Parts & Labor
Short Block All Applications 1 Year / 12,000 Miles – Parts & Labor

Gasoline Engines

Product Application Coverage
Complete Drop-In On Highway Only 2 Years / Unlimited Miles – Parts & Labor

Engine Components

Product Coverage
Cylinder Heads (New or Remanufactured) 1 Year / Unlimited Miles – Parts & Limited Labor*
All Other Components 1 Year / Unlimited Miles – Parts Only

* First 6 months: total covered labor charges capped at $1,500. Second 6 months: parts coverage only, no labor.

Labor Hour Limits

  • On Highway Diesel Drop-In: 40 hours maximum
  • Transit Bus / Motorcoach / Motorhome / Marine / Off Highway / Industrial: 30 hours maximum
  • Gasoline Engines: 20 hours maximum
  • 2nd Year Coverage (Drop-In): Long Block only

LIMITED WARRANTY

The remanufacturer warrants to the purchaser and original owner that the remanufactured product will be free from defects in materials and workmanship under normal use and service for the time periods and coverage specified above. The limited warranty period commences from the date of product installation or thirty (30) days from shipment, whichever occurs first.

Subject to the coverage periods above, the exclusive remedy and sole liability, whether based on contract, warranty, tort, or any other basis, is limited at the remanufacturer's election to:

  • Replacement of any product or part found not to conform to the limited warranty, or
  • Repair of such product or part, or
  • Refund or credit of the net sales price of the defective product or part

CONDITIONS AND EXCLUSIONS

This limited warranty applies only to products sold and used in the continental United States and Canada.

To be eligible for warranty coverage:

  • A completed registration form and copy of the repair order or installation record must be received within 30 days of shipment
  • The claim and repair procedures must be followed
  • The failure must be a direct result of a defect in material or workmanship

This limited warranty excludes:

  • Damages due to accident, abuse, misuse, tampering, abnormal operating conditions, negligence, improper shipping, storage, installation, maintenance, or fluids
  • Products manufactured by others (covered only by their manufacturer's warranty)
  • Products installed, altered, modified, serviced, or repaired by non-competent facilities
  • Normal maintenance and wear items (filters, hoses, belts, fluids, gaskets, seals, etc.)
  • Glow plugs or sensors (covered for 6 months only)
  • Products with modified emissions or management systems
  • Products with tampered serial numbers or altered mileage/hours
  • Products sold or transferred to another owner (warranty is non-transferable)
  • Diagnostics or repairs incurred prior to warranty determination
  • Towing, premium freight, taxes, travel, lodging, loss of revenue, rental charges, overtime, or property damage

CLAIM AND REPAIR PROCEDURES

Prior to performing any repairs, the owner must establish that the product is within warranty coverage and file a claim. Until the remanufacturer determines there is a covered defect, all diagnostics and repairs are the owner's responsibility.

Repair facilities must:

  • Verify the product is within the warranty period and was properly registered
  • Identify and report the defect with detailed description of the complaint and cause of failure
  • Provide detailed product, owner, and application information including mileage/hours
  • Obtain authorization before proceeding with repairs
  • Facilitate return of the failed product and submit repair order within 45 days

Labor Rates: The maximum hourly labor rate for fleet-installed engines is $60/hour. The maximum hourly rate otherwise is $95/hour. Reimbursement is based on Standard Repair Times (SRTs) published in industry-recognized labor manuals.

Payment: Claims are processed only after the product has been returned, analyzed, and approved for a covered defect. Non-covered expenses are the responsibility of the owner or repair facility.

WARRANTY LIMITATIONS

THE WARRANTIES SET FORTH HERE ARE THE ONLY WARRANTIES MADE. ALL OTHER WARRANTIES ARE EXCLUDED, WHETHER EXPRESS OR IMPLIED BY OPERATION OF LAW OR OTHERWISE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.

IN NO EVENT SHALL THE REMANUFACTURER BE LIABLE FOR DAMAGES OF ANY KIND, WHETHER DIRECT, INDIRECT, SPECIAL, INCIDENTAL, CONSEQUENTIAL, PUNITIVE, OR FOR PERSONAL INJURY OR PROPERTY DAMAGES.

If a warranty claim is not pursued or acted on for over thirty (30) days, it will be closed. The warranty period remaining after repair or replacement shall be the remaining months or miles from the original installation date.

Last Updated: December 2025

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All specifications and numbers are provided for reference only and should be independently verified before use. While we guarantee our parts match their descriptions and accept returns for any discrepancies, we cannot be held liable for installation costs, modifications, or consequential damages. Questions about compatibility? Contact our parts experts at 800-828-6943, sales@dieselcranks.com, or via live chat, Mon-Fri 8am-5pm EST.