Home/Caterpillar 3116 & 3126 Parts/381251 Cat / Caterpillar BELT TENSIONER
Cat / Caterpillar BELT TENSIONER
Caterpillar · Models: 3126 / C7

381251 Cat / Caterpillar BELT TENSIONER

Commercial diesel cab. Match the listed part and engine identifiers before ordering.
2-Year WarrantyPAI Industries
$233.58$255.87 Save $22.29
In stock — confirm dispatch timing
Fitment details

Want us to check the fit? Share any details you have below. All fields are optional. Your request will be included with your order, and a specialist may contact you before fulfillment.

Secure Checkout Review Return Policy Warranty Details Ask About Same-Day Shipping

Compare Standard and Economy

Check application, pack quantity, and coverage
Standard Best coverage
$233.58
2-year warranty
PAI 381251JAKS-PAI-381251
In stock
Selected · add it below
EconomySave $152.09 · 65% less
$81.49
12-month warranty
PAI 381251EJAKS-PAI-381251E
In stock · 4 available
Choose Economy

Compare warranty, price, pack quantity, and included components. Confirm the part against your engine details before ordering. Compare warranties →

PAI Part #381251
JAK'S Part #JAKS-381251
Catalog refCATERPILLAR 120-6659
Catalog refCATERPILLAR 1206659
Catalog refCATERPILLAR 135-2151
Catalog refCATERPILLAR 1352151
Not sure it's the right fit? Call a specialist
(720) 445-6249
Talk to a tech or text a photo of your part tag — we'll confirm fitment before you buy
Complete The Rebuild

Suggested Additional Parts

Commonly sold with this product. These parts are sold separately.

  1. Cummins M11 Belt Tensioner
    180895Cummins M11 Belt Tensioner In stock
    $210.97View ›
  2. International / Navistar BELT TENSIONER
    480890International / Navistar BELT TENSIONER In stock
    $117.91View ›
  3. Cat / Caterpillar SEAL
    EOS-3305Cat / Caterpillar SEAL In stock
    $4.21View ›
  4. Cat / Caterpillar WATER PUMP ASSEMBLY
    381806Cat / Caterpillar WATER PUMP ASSEMBLY In stock
    $280.11View ›
  5. Caterpillar C7 190F Thermostat, PAI (OEM 1154223), Pack of 1
    381861Caterpillar C7 190F Thermostat, PAI (OEM 1154223), Pack of 1 In stock
    $22.92View ›
381251 Cat / Caterpillar BELT TENSIONER
BrandPAI Industries
Engine MakeCaterpillar
Engine Model3126 · C7

BELT TENSIONER

Fits:

  • CATERPILLAR 3126 SERIES
  • CATERPILLAR C7 ENGINE

OEM cross-references:

  • CATERPILLAR 120-6659
  • CATERPILLAR 1206659
  • CATERPILLAR 135-2151
  • CATERPILLAR 1352151
  • CATERPILLAR 217-8938
  • CATERPILLAR 2178938
  • CATERPILLAR 7E3999
  • DETROIT DIESEL 23550238
  • FREIGHTLINER TRUCK PARTS GT38511
  • MACK 4333-1687819C91
  • MACK 4333-1833688C1
  • MACK 4333-2028958C92
  • MACK 4333-3543883C1
  • MACK 87GB33
  • NAVISTAR 1687819
  • NAVISTAR 1687819C91
  • NAVISTAR 1687819C92
  • NAVISTAR 1833688
  • NAVISTAR 1833688C1
  • NAVISTAR 1833688C2
  • NAVISTAR 2028958
  • NAVISTAR 2028958C91
  • NAVISTAR 2028958C92
  • NAVISTAR 3543883
  • NAVISTAR 3543883C1

Warranty: 24 months