Used Caterpillar Cylinder

Caterpillar Hydraulic Cylinder: Function and Wear

In a machine's hydraulic system, the cylinder converts the oil pressure delivered by the valve into linear force. It endures repeated shocks, dust, and significant temperature fluctuations. Wear points are always the same: rod and piston seals, rod surface condition, bushings, and ball joints. An original Caterpillar cylinder maintains its factory diameters, stroke, and mountings: the simplest way to replace it without modifications.

Caterpillar Cylinders Available by Function

• Excavator Equipment: boom cylinders, arm cylinders, bucket cylinders, and variable flow cylinders.
• Loaders: lift arm cylinders and tilt cylinders.
• Bulldozers and Motor Graders: blade lift cylinders, tilt, angle, and side shift cylinders.
• Dump Trucks: bed cylinders and suspension cylinders.
• Articulated Joints: articulation cylinders, steering cylinders, and stabilizers.

Tracked Excavators, Loaders, and Bulldozers Supported

Our stock covers Caterpillar tracked excavators from 302.5 to 374DL models, including 312, 320B, 320C, 320E, 323D, 323F, 325FLCR, 336E, and 345CL, as well as wheeled excavators M313D to M325C. For wheeled loaders, coverage ranges from 918M to 980M, featuring 938H, 938M, 966H, 966K, and 966M XE models. Also included are D4H to D7H bulldozers, including the D6N LGP, tracked loaders 963C and 963K, motor graders 12H, 140H and 14M, dump trucks 735 and 769C to 775B, and backhoe loaders 428, 432E, and 438B.

How to Identify a Caterpillar Cylinder: Essential Measurements

• Machine: model, year, and serial number of the equipment.
• Function and position: boom, arm, bucket, left or right side.
• Caterpillar reference number stamped on the cylinder body.
• Dimensions: closed center-to-center distance, stroke, rod diameter, and bore diameter.
• Mountings and connections: clevis, ball joint or trunnion, position of ports.

Caterpillar Cylinder Seals or Hydraulic Seal Kit?

A rod seal leak doesn't always mean the cylinder must be replaced. If the rod is intact and the tube is free of scratches, a hydraulic cylinder seal kit applied by a specialized workshop may suffice. However, a pitted, bent rod or damaged chrome plating will quickly destroy replacement seals. In such cases, a used original cylinder inspected in our workshop is usually the fastest solution. Codimatra sells complete cylinders: consult our technicians before making your choice.

Caterpillar Steering Cylinder: What to Check

• Ball joints and pins: play at both ends, condition of bushings on the frame.
• Rod: scratches, pitting, or impact marks in the working area.
• Sealing: leaks at the rod seal or fittings.
• Stroke: full steering range both sides, smooth operation.
• Reference: our Caterpillar steering cylinders are organized by original machine type.

Proper Installation of a Used Cylinder

Before installation, check the condition of the machine’s pins and bushings: an ovalized pin quickly damages the ball joints of a fitted cylinder. Install the cylinder with the rod retracted, connect clean hoses, then purge air by performing multiple slow cycles without load. Then check the hydraulic oil level and ensure fittings are leak-free. A correctly mounted original cylinder will perform as Caterpillar specified.

Codimatra, Your Source for Used Caterpillar Cylinders

• Over 40 years of experience dismantling construction machinery.
• Approximately 17,000 references in stock, including our full cylinder range across all brands.
• Original solution close to your Cat dealer, with controlled lead times and budget.
• Workshop inspection: rod, seals, mountings, and sealing.
• Shipping from Castelculier, near Agen, France, and internationally. Get a quote at 05 53 96 16 43.