Cat Excavator Hydraulic Cylinders

Arm cylinders, boom cylinders, and bucket cylinders for Caterpillar excavators, covering a wide range of B, C, D, E, F, and G series machines from compact 311 models up through large 385 and 568 class excavators. New replacement cylinders available for the most common Cat excavator platforms, with part numbers cross-referenced across generations.

Fits Models At A Glance

• 300B Series: 311B, 312B, 312B L, 313B, 318C, 319C, 320B, 320B FM LL, 320B L, 321B, 322C, 325B L, 330B L, 345B, 345B II, 345B II MH, 345B L, 365B, 365B II, 385B
• 300C Series: 311C, 312C, 312C L, 314C, 315C, 320C, 320C L, 321C, 322C, 325C, 325C FM, 330C, 330C L, 345C, 345C L, 385C L
• 300D Series: 311D LRR, 312D, 312D L, 314D CR, 314D LCR, 320D, 320D FM, 320D GC, 320D L, 320D LN, 320D LRR, 320D RR, 321D LCR, 323D L, 323D LN, 323D SA, 324D, 324D L, 325D, 325D L, 328D LCR, 329D, 329D L, 329D LN, 330D, 330D FM, 330D L, 330D LN, 336D, 336D L, 336D LN, 336D2, 336D2 L, 340D2 L, 345D, 345D L, 345D L VG, 349D, 349D L
• 300E Series: 312E, 312E L, 314E LCR, 320E L, 324E, 324E L, 324E LN, 329E, 329E L, 329E LN, 336E, 336E H, 336E L, 336E LH, 336E LN
• 300F/G Series: 326G, 336F L, 568 FM LL

Key Notes

• Cylinder Types: Arm (stick), boom, and bucket cylinders available across multiple series
• Cross-Reference: Many cylinders cross multiple Cat part numbers — OEM references included in listings
• Size Range: Coverage spans compact 311/312 class through large 345, 365, and 385 class excavators
• Fitment Overlap: Several cylinders fit across C, D, and E series machines — verify by part number before ordering

Why Choose Broken Tractor

• ✅ Broad Cat excavator cylinder coverage in one place
• ✅ OEM part numbers cross-referenced for confident ordering
• ✅ Fast shipping from Baton Rouge, LA and Kimbolton, OH

Frequently Asked Questions

What Caterpillar excavator hydraulic cylinders does Broken Tractor carry?

Broken Tractor carries new replacement arm (stick), boom, and bucket cylinders for Caterpillar excavators. Coverage includes B, C, D, E, F, and G series machines, from compact 311 and 312 models up through large 345, 365, 385, and 568 class excavators.

How do I find the right hydraulic cylinder for my Cat excavator?

The most reliable way is to match the OEM Caterpillar part number on your old cylinder. Our listings include cross-referenced OEM part numbers, since many cylinders carry more than one Cat number across generations. Fitment can vary by model and serial number, so if you are unsure, call our parts team at (800) 909-7060 before ordering.

Do Cat excavator cylinders interchange between C, D, and E series machines?

Some do. Several cylinders fit across C, D, and E series machines, for example within the 320C, 320D, and 320E L range. Overlap is not universal, though, so always verify by part number before ordering.

Which Cat excavator models do your boom, arm, and bucket cylinders fit?

We carry cylinders for a wide range of Cat excavators, including the 311B, 312B, 320B, 330B L, and 345B in the B series, the 312C, 320C, 325C, and 330C in the C series, and the 320D, 324D, 329D, 336D, and 349D in the D series. E, F, and G series coverage includes the 312E, 320E L, 324E, 336E, 336F L, 326G, and 568 FM LL. Coverage differs by cylinder type, so match the cylinder to your exact model and part number.

Are your Caterpillar excavator hydraulic cylinders new or rebuilt?

Broken Tractor offers new replacement hydraulic cylinders for the most common Cat excavator platforms. Each listing includes the OEM part numbers it replaces, which helps you order with confidence, and we offer fast shipping from Baton Rouge, LA and Kimbolton, OH.