- Cylinder Rebuild/Repair Seal Kit for Caterpillar Model 963 Crawler Loader
- All Serial Numbers (06Z1-UP; 11Z1-UP; 18Z1-UP; 21Z1-UP; 29S1-UP; 48Z1-UP)
- Cylinder #: 3G3874
- Rod: 3-3/4"
- Bore: 6-1/2"
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