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