QY70K Telescopic Cylinder I Seal Kit – Variant 2
For procurement teams: Send cylinder label and old seal layout; do not mix Variant 1 and Variant 2.
Where It Works
Variant 2 is kept separate because production revisions can change seals and guides even within cylinder I.
Before You Quote
Failure Pattern and Root Cause
Boom creep may arise from seals, holding valves or control leakage; irregular movement may involve guides or air.
Installation Outcome to Verify
Support the boom, keep variant parts separated, rebuild cleanly and verify extension and holding.
Explore Related Parts
XCMG Balance Valve 803001825 · XCMG QY50K Hydraulic Pump 803000260
Questions from Maintenance Teams
Is Variant 2 interchangeable with Variant 1?
Not without matching evidence.
Will it cure boom drift?
Only if cylinder bypass is confirmed.
What prevents repeat leaks?
Repair surface and guide damage.
Variant 2 components are individually labelled.
