Excavator Boom Drift — Seal Kits and Valve Checks for RFQ
Applies to: JCB excavators & mid-size diggers
Quick answer
Excavator Boom Drift — Seal Kits and Valve Checks for RFQ on JCB excavators & mid-size diggers: typical warning signs include Boom settles with engine off or at idle; Drift under suspended load. Common causes include Worn piston / rod seals in boom cylinder; Holding valve or spool leakage. These notes identify parts to quote — they are not a certified repair procedure.
- Independent OEM-compatible supplier — not affiliated with JCB Ltd.
- Workshops typically RFQ: boom cylinder seal kit.
- Workshops typically RFQ: rod wiper.
- Workshops typically RFQ: holding valve.
- Workshops typically RFQ: hydraulic filter.
Warning signs
- Boom settles with engine off or at idle
- Drift under suspended load
- Uneven cylinder speed extend vs retract
- Visible oil weep at cylinder gland
Common causes
- Worn piston / rod seals in boom cylinder
- Holding valve or spool leakage
- Contaminated oil scoring spools
- Incorrect hose routing after rebuild
Parts to quote
Typical line items workshops search next to this fault. Matched catalogue links go to a verified SKU when found; otherwise open search so you can RFQ by keyword. We confirm fitment before quoting.
FAQ
Can I quote only a seal kit?▼
Often yes if the rod is not scored. Measure rod diameter and send cylinder photos with the OEM stamp if visible. We confirm kit fitment before quoting.
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Confirm fitment & get a quote
Send machine model, hours, and part photos. We reply with availability, MOQ, and lead time in writing — no invented stock claims.