Cat® Spare Parts to Have On-Hand for Your Heavy Equipment: Cylinder Seals


As part of our ongoing series about Cat spare parts to have on hand in case something happens, today we'll take a look at the lowly cylinder seal —  "lowly" as in "often overlooked." The cylinder seal works in tandem with your machine's hydraulic cylinders, which hold the hydraulic fluid that then powers many functions in heavy equipment. The cylinder seal's job is to ensure that there are no leaks of hydraulic fluid, no other material can penetrate the cylinder and affect performance, and hydraulic pressure is maintained for optimal performance. Below, we'll take a look at some of the cylinder seals you should have on-hand for your heavy equipment.

Wagner Equipment Co. is your Caterpillar dealer with locations in Colorado, New Mexico, and far west Texas. Since 1976, we've been serving customers with new, used, and rental heavy equipment, as well as work tools, Cat attachments, genuine Cat Parts, shop and field service, maintenance, and more. Our mission is to be your all-in-one heavy equipment provider, able to help you from the moment you purchase your Cat machine until the day you sell it. By offering the best Cat spare parts for your heavy equipment, we can ensure you'll be prepared if your machine needs parts. Contact your nearest Wagner location to get started today!




Piston Seals

Piston seals help in the piston to prevent damage to your machines and ensure optimal machine performance. We offer over 200 piston seals for your Cat machine, which vary based on bore diameter, groove width, and one- or two-piece seals. Our Cat 130-1857: Piston Seal works to prevent oil from penetrating into the cap end of the cylinder. This cylinder seal is made from the best products, including Teflon. One of our one-piece seals, the 096-5167: Piston Seal, fits many track and wheeled excavators, material handlers, work tools, and more. Check these options out online today!


Head Seals

Head seals, or O-rings, help to seal off the head of the cylinder, preventing material from entering and hydraulic fluid from leaking. The key to these O-rings, including this 5H-8848: Ring, is that they are made from the highest-quality materials designed to match the fluids, temperatures, and pressures found in Caterpillar heavy equipment. They offer superior sealing and resistance to wear and tear, and some are even coated with PTFE to help minimize twisting and cutting during the installation process. Emphasis is placed on ensuring a tight seal. The 6V-7658: Seal fits many wheel loaders, material handlers, forestry machines and excavators.


Buffer Seals

Buffer seals like our 152-9022: Buffer Seal are extremely helpful in protecting rod seals from an increase in pressure. The primary buffer seal affords the majority of the protection of the rod not only by sealing, but also by allowing hydraulic fluid in to work its magic. This helps keep the rod dry and helps ensure that any trapped fluid gets to where it needs to go. We offer many different types of buffer seals for your heavy equipment, including our 135-1999: Buffer Seal, so be sure to choose the right one for your needs. 


Press-In Wiper Seals

Press-in wiper seals help prevent contaminants from entering the hydraulic cylinder and causing problems. We offer four types: 

  1. Single-lip (the lip is the edge of the seal) wipers help to clean the rod as it retracts. Our 155-9194: Press-In Wiper Seal fits this category nicely
  2. Double-lip wipers clean the rod as it retracts and seal the oil in, helping to prevent leaks. They are usually found in a metal case for added strength. They are also referred to as canned wipers or J wipers (the metal forms a "J" shape when viewed in cross-section). Our 227-1148: Press-In Wiper Seal can help.
  3. Check out our 152-5063: Press-in Wiper Seals, a modified press-in single wiper seal.
  4. The 1U-4021: Press-In Wiper Seal is an angled single press-in wiper seal.

Admittedly, this can be confusing, which is why the service departments at all of our locations are here to help. Call, or stop by with your questions today.

Admittedly, this can be confusing, which is why the service departments at all of our locations are here to help. Call, or stop by with your questions today.




Wagner Equipment Co. endeavors to keep your much-needed Cat spare parts on-hand for when you need them the most. All of our locations maintain well-stocked parts departments, so you can swing by and grab the parts you need, including cylinder seals. We run a nightly parts shuttle from our main Aurora, Colorado location (minutes away from Cat's western US parts distribution center), to quickly get you any parts that are not in stock. In addition, you can order Cat parts online. In addition, we offer remanufactured components: exchange your worn component for a warranted, remanufactured one. This saves you money and greatly decreases downtime when your machine needs a component. 

Wagner offers the best heavy equipment, including new, used, and heavy equipment for sale and for rent. We have full-service shop facilities at all locations, and over 235 field service technicians who can come to you. Our fluids analysis allows you to know the state of your heavy equipment's health, and if it's time for a rebuild, we can help with that as well. We hope to provide everything you need to keep your Caterpillar machinery up and running. 

By abiding by our values in action — teamwork, excellence, accountability, safety, integrity, and communication — we are proud to offer you the best customer service around. Stop by your nearest Wagner location in Colorado, New Mexico, or west Texas to get started today!