OEM-specification CAT Hydraulic Component. Part number 3J8688. Compatible with 630b, 631b, 631D, 631e, 631g, 637e, 637g.
Always verify with serial number before ordering.
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Flush hydraulic lines before fitting new components. Use only manufacturer-specified hydraulic fluid. Check O-rings and backup rings for correct orientation. Bleed air from system after installation.
Always consult the OEM service manual for model-specific torque values and procedures. WhatsApp our technical team if you need fitment guidance.