CAT Parts

Primary Air Filter - Replacement for CAT 689401 - PartsOnline
CAT Primary Air Filter - Replacement for CAT 689401
$31.05
Primary Air Filter - Replacement for CAT 688491 - PartsOnline
CAT Primary Air Filter - Replacement for CAT 688491
$31.05
Primary Air Filter - Replacement for CAT 674979 - PartsOnline
CAT Primary Air Filter - Replacement for CAT 674979
$31.05
Primary Air Filter - Replacement for CAT 583456 - PartsOnline
CAT Primary Air Filter - Replacement for CAT 583456
$31.05
Inner Air Filter - Replacement for CAT 3197539 - PartsOnline
CAT Inner Air Filter - Replacement for CAT 3197539
$42.80
Inner Air Filter - Replacement for CAT 9Y6823 - PartsOnline
CAT Inner Air Filter - Replacement for CAT 9Y6823
$40.51
Inner Air Filter - Replacement for CAT 3I0266 - PartsOnline
CAT Inner Air Filter - Replacement for CAT 3I0266
$40.51
Inner Air Filter - Replacement for CAT 2349828 - PartsOnline
CAT Inner Air Filter - Replacement for CAT 2349828
$23.06
Inner Air Filter - Replacement for CAT 1710493 - PartsOnline
CAT Inner Air Filter - Replacement for CAT 1710493
$29.54
Inner Air Filter - Replacement for CAT 1467473 - PartsOnline
CAT Inner Air Filter - Replacement for CAT 1467473
$29.54
Inner Air Filter - Replacement for CAT 3I1996 - PartsOnline
CAT Inner Air Filter - Replacement for CAT 3I1996
$29.93
Inner Air Filter - Replacement for CAT 1402337 - PartsOnline
CAT Inner Air Filter - Replacement for CAT 1402337
$29.93
Inner Air Filter - Replacement for CAT 1402334 - PartsOnline
CAT Inner Air Filter - Replacement for CAT 1402334
$29.93
Air Filter - Replacement for CAT H12000912 - PartsOnline
CAT Air Filter - Replacement for CAT H12000912
$29.91
Air Filter - Replacement for CAT 3I0167 - PartsOnline
CAT Air Filter - Replacement for CAT 3I0167
$29.91
Fuel Filter Cartridge - Replacement for CAT 9Y4430 - PartsOnline
CAT Fuel Filter Cartridge - Replacement for CAT 9Y4430
$20.71
Fuel Filter Cartridge - Replacement for CAT 8T7477 - PartsOnline
CAT Fuel Filter Cartridge - Replacement for CAT 8T7477
$20.71
Fuel Filter Cartridge - Replacement for CAT 676987T - PartsOnline
CAT Fuel Filter Cartridge - Replacement for CAT 676987T
$20.71
Fuel Filter Cartridge - Replacement for CAT 676987E - PartsOnline
CAT Fuel Filter Cartridge - Replacement for CAT 676987E
$20.71
Fuel Filter Cartridge - Replacement for CAT 5W6081 - PartsOnline
CAT Fuel Filter Cartridge - Replacement for CAT 5W6081
$20.71
Fuel Filter Cartridge - Replacement for CAT 3I1341 - PartsOnline
CAT Fuel Filter Cartridge - Replacement for CAT 3I1341
$20.71
Fuel Filter Cartridge - Replacement for CAT 696987E - PartsOnline
CAT Fuel Filter Cartridge - Replacement for CAT 696987E
$20.71
Fuel Filter Cartridge - Replacement for CAT 100051232 - PartsOnline
CAT Fuel Filter Cartridge - Replacement for CAT 100051232
$20.71
Fuel Filter Cartridge - Replacement for CAT 971357 - PartsOnline
CAT Fuel Filter Cartridge - Replacement for CAT 971357
$20.71
Fuel Filter Cartridge - Replacement for CAT 676987 - PartsOnline
CAT Fuel Filter Cartridge - Replacement for CAT 676987
$20.71
Fuel Filter Cartridge - Replacement for CAT 337854 - PartsOnline
CAT Fuel Filter Cartridge - Replacement for CAT 337854
$20.71
Spin-On Duramax Hydraulic Filter - Replaces CAT 3I0743 - PartsOnline
CAT Spin-On Duramax Hydraulic Filter - Replaces CAT 3I0743
$50.40
Spin-On Duramax Hydraulic Filter - Replaces CAT 1081153 - PartsOnline
CAT Spin-On Duramax Hydraulic Filter - Replaces CAT 1081153
$167.44
Spin-On Duramax Hydraulic Filter - Replaces CAT 3I1761 - PartsOnline
CAT Spin-On Duramax Hydraulic Filter - Replaces CAT 3I1761
$85.50
Spin-On Duramax Hydraulic Filter - Replaces CAT 3I0610 - PartsOnline
CAT Spin-On Duramax Hydraulic Filter - Replaces CAT 3I0610
$85.50
Spin-On Duramax Hydraulic Filter - Replaces CAT 3I0548 - PartsOnline
CAT Spin-On Duramax Hydraulic Filter - Replaces CAT 3I0548
$85.50
Spin-On Duramax Hydraulic Filter - Replaces CAT 3I0554 - PartsOnline
CAT Spin-On Duramax Hydraulic Filter - Replaces CAT 3I0554
$85.50
Spin-On Duramax Hydraulic Filter - Replaces CAT 1919784 - PartsOnline
CAT Spin-On Duramax Hydraulic Filter - Replaces CAT 1919784
$85.50
Spin-On Duramax Hydraulic Filter - Replaces CAT 3416643 - PartsOnline
CAT Spin-On Duramax Hydraulic Filter - Replaces CAT 3416643
$85.50
Spin-On Hydraulic Filter - Replacement for CAT 3I1245 - PartsOnline
CAT Spin-On Hydraulic Filter - Replacement for CAT 3I1245
$21.20
Engine Oil Filter - Replacement for CAT 3776969 - PartsOnline
CAT Engine Oil Filter - Replacement for CAT 3776969
$14.90

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Aftermarket Replacement Parts for Caterpillar Equipment

Parts Online carries aftermarket replacement parts for Caterpillar construction equipment, including skid steers, excavators, wheel loaders, backhoe loaders, dozers, graders, and telehandlers. Our catalog covers commonly replaced maintenance, wear, and service parts such as cab glass, ignition keys, mirrors, wiper parts, fluid caps, breathers, and air filters. Each product page lists the OEM part number it replaces so you can verify fitment before ordering.

We stock glass for a wide range of CAT equipment including door glass, window glass, side glass, and rear glass for skid steers, excavators, wheel loaders, and dozers. We also carry keys, mirrors, and wiper components for cab maintenance. If you are unsure which part fits your machine, contact our team with your model and serial number and we will help verify compatibility.

Aftermarket vs OEM CAT Parts

Aftermarket parts are manufactured by third-party suppliers to match the form, fit, and function of the original Caterpillar part. They replace the same OEM part number and are designed to the same dimensions and material specifications. The main difference is price. Aftermarket parts typically cost significantly less than ordering the same part through a CAT dealer. For wear items like cab glass, keys, mirrors, and wipers, aftermarket replacements perform identically to the OEM original.

Parts Online matches every product to its OEM part number so you can cross-reference what you need. If your CAT dealer quoted you a part number, you can search that number on our site to find the aftermarket equivalent. We do not sell parts for proprietary electronic control systems or software-dependent components. Our catalog focuses on mechanical, wear, and maintenance parts where aftermarket alternatives are well-established and reliable.