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Your Caterpillar account is the single account you use to log in to select services and applications we offer. Shop for parts and machines online, manage your fleet, go mobile, and more.
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Cat® Bucket Cylinder Pin & Bearing Replacement
CAT SELF-SERVICE OPTIONS (SSO)
Ready to replace the bucket cylinder pins and bearings on your Cat® excavator? With our Self-Service Options, it's easy to do the work yourself. They include genuine Cat repair parts, list of recommended tooling, service instructions and more all in one convenient package.
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Maintenance Tips
Watch for these common repair indicators:
Sticking joint
Loose joint
Increased play/slop in joint
What's In the Cat Bucket Cylinder Pin & Bearing Replacement Self-Service Option?
Recommended Parts
Pins/bushings/bearings
Recommended Tools
Stand GP
Tube AS
Pin AS
Repair instructions included
Additional Options
Service/replace hydraulic cylinder
Inspect/replace hydraulic lines/hoses
Salvage worn structures (line bore, etc.)
Perform S•O•S℠ sampling
Hydraulic Excavators
313D, 314C, 314D, 314E, 315B, 315C, 315D, 316E, 318D, 320B, 320C, 320D, 320E, 321C, 321D, 322B, 322C, 323D, 324D, 324E, 325B, 325C, 325D, 328D, 329D, 329E, 330B, 330D, 330F
Frequently Asked Questions
What typically causes pin failure?
Lack of lubrication is the number-one cause of pin failures. It can result in pin galling, where a friction weld develops between surfaces. That can cause the pin to seize up so the joint no longer moves.
How do I inspect pins and bearings?
Check pins and joints during your daily walkaround. Look for damage to bolts, washers, plates and zerks. Check around joints and pins for leaks, rust or grease buildup. If you notice any parts are missing, replace them immediately. If your machine is equipped with autolube, make sure those lines are not damaged.
Another indication of pin damage is the machine is no longer digging as accurately as it once was. In addition, the bucket may seem looser than before.
When operating your machine, listen for unusual sounds. Squeaky joints may not be properly greased, so you’ll want to find and correct the problem.
NOTE: Always consult your machine's Operation & Maintenance Manual for specific instructions.
How do I grease pins and bearings?
Grease regularly to help parts move smoothly and to purge contaminants from the joint. To start, place your equipment on the ground so you can work safely. Grab your grease gun and a shop towel for cleaning off the zerks. Then you can pump in grease until it begins to emerge from the pin joint. You can find greasing locations and intervals in your machine's Operation & Maintenance Manual.
Why should I choose Cat pins and bearings at replacement time?
Cat pins and bearings are designed with your machine to strict Caterpillar specifications. That means every joint is a precision fit, which helps deliver enhanced productivity and long life as well as keep operating costs low.
Cat linkage pins are manufactured with increased heat treat depth for strength in high-load conditions. This high surface hardness leads to improved resistance to abrasive wear. The surface of Cat linkage pins also makes them highly resistant to abrasive wear. Ultra-fine surface finishes give smoother performance and lower wear rates.
