Cat 420D, 420E, 430D, 430E Backhoe Loader Lift Cylinder Seal Kit 2432276 – 50mm Rod

Fits Models At A Glance:

• Caterpillar Backhoe Loaders – D Series: 420D After Serial Number BLN10300, 430D After Serial Number BNK05900 and BML04800
• Caterpillar Backhoe Loaders – E Series: 420E (Parallel Lift PHC and Single Tilt PRA), 430E (Parallel Lift SCD and Single Tilt RLN)

Key Notes:

• Part Number(s): 2432276 (243-2276)
• Weight: 0.50 lbs (0.23 kg)
• Application: Seal kit for the loader lift cylinder groups 228-3505, 228-3509 and 230-0980
• Dimensions: 50 mm rod x 85 mm bore
• Serial Number Notes: This kit is for the 50 mm rod lift cylinder used on the later 3054C-engine D series and the C4.4-engine E series. Earlier 420D (Before Serial Number BLN10300) and 430D (Before Serial Number BNK05900 / BML04800) use the 2" rod lift cylinder, which takes seal kit 2600273 instead.
• Quantity: Reseals one cylinder — order two for both loader lift cylinders
• Condition: Aftermarket replacement part

Common Use Case or Symptoms:

Use when the loader arms drift down with a loaded bucket, oil streaks the lift cylinder rods, or the loader feels weak on one side on a Cat 420E or 430E.

Why Choose Broken Tractor:

• ✅ Serial-break guidance included — we tell you which prefix takes this 50 mm kit and which takes the 2" kit so the right seals arrive the first time.
• ✅ Correct OEM dimensions — 50 mm x 85 mm matched to Cat lift cylinder groups 228-3505, 228-3509 and 230-0980.
• ✅ Backhoe specialists since 2006 — third-generation parts family that works on these machines, not a drop-ship catalog.