Volvo 11704999 Back-Up Ring

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Material	PTFE (Polytetrafluoroethylene)
Component Type	Back-Up Ring (Anti-Extrusion Ring)
Color	Brown
Applications	Hydraulic Cylinder Seal Support
OEM Reference	VOE11704999
Net Weight	0.05 kg
Package Dimensions	10 × 10 × 5 cm

Manufacturer No.

11704999
VOE11704999
VOE 11704999

OEM Part No.

11704999
VOE11704999

Interchange No.

BR-04999
VO11704999
VP11704999

Fitment Vehicles

Volvo EW140
Volvo EW140B
Volvo EW140C
Volvo EW140D
Volvo EW140E
Volvo EW145B
Volvo EW160
Volvo EW160B
Volvo EWR150E
Volvo L40
Volvo L40B
Volvo L45
Volvo L45B

The Volvo 11704999 back-up ring (VOE11704999) is a precision-molded PTFE anti-extrusion ring designed for hydraulic cylinder sealing systems in Volvo construction machinery. It provides rigid structural support to primary seals, preventing extrusion into clearance gaps under high-pressure operating conditions.

Manufactured to Volvo CE original equipment specifications, this component ensures seal integrity in dynamic hydraulic applications including boom, arm, bucket, and steering cylinders. The ring features a scarf-cut or endless profile optimized for installation in closed grooves. Material composition is high-performance PTFE (Polytetrafluoroethylene), offering low friction, wide temperature range compatibility, and resistance to hydraulic fluids.

Cross-reference interchange includes VOE 11704999, VO11704999, VP11704999, and aftermarket reference BR-04999. Direct fitment verified for Volvo wheeled excavators EW140, EW140B, EW140C, EW140D, EW140E, EW145B, EW160, EW160B, EWR150E and compact wheel loaders L40, L40B, L45, L45B. Used in front axle hub reduction and hub retainer planet carrier assemblies.