Hypertherm - Cut with Confidence

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How to Repair a Bleed Down Valve Assembly ll #12981

Written By: Adam Dumas (and 2 other contributors)
  • Comments: 2
  • Favorites: 3
  • Completions: 6

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  1. Always make sure all high-pressure water has been removed from valve by following machine manufacturers' safety instructions. Failure to do so can cause severe injury or death. Turn OFF all hydraulic and water pressure to bleed-down valve

    • Always make sure all high-pressure water has been removed from valve by following machine manufacturers' safety instructions. Failure to do so can cause severe injury or death.

    • Turn OFF all hydraulic and water pressure to bleed-down valve

    • Loosen hydraulic hose from hydraulic fitting using 7/8" and 3/4" wrench

  2. Unthread hose from hydraulic fitting Loosen hydraulic fitting from Adapter Fitting 1-1/4" and 7/8" wrench Unthread hydraulic fitting from adapter fitting

    • Unthread hose from hydraulic fitting

    • Loosen hydraulic fitting from Adapter Fitting 1-1/4" and 7/8" wrench

    • Unthread hydraulic fitting from adapter fitting

    • Apply o-ring lubricant to o-ring from kit for hydraulic fitting

    • Replace o-ring around hydraulic fitting with o-ring in kit (smallest o-ring in kit)

    • Loosen adapter fitting from Actuator Housing with1-1/4" and 1-1/16" wrench

    • Unthread adapter fitting from actuator housing

    • Apply o-ring lubricant to largest o-ring in kit

    • Replace o-ring on adapter fitting with largest o-ring in kit

    • Loosen actuator housing from Valve Body using 1-1/16" and 7/8" wrench

    • Unthread actuator housing from valve body

    • Loosen HP tubing from Bleed Down Valve inlet

    • Unthread gland nut with HP tubing from bleed down valve inlet

    • Clean gland nut of all Blue Goop with isopropyl alcohol

    • Loosen gland nut from outlet fitting using 13/16" and 5/8" wrench

    • Unthread gland nut from outlet adapter

    • Clean gland nut of all blue goop with isopropyl alcohol

    • Push Piston out of actuator housing through oil port using included dowel

    • Discard o-ring and backup ring from piston

    • Inspect piston, if damage is visible, replace

    • Apply o-ring lubricant to cover all of o-ring and back-up ring

    • Slide new back-up o-ring (flat) to groove of piston Make sure concave of back-up ring side is towards o-ring

    • Slide new o-ring (rounded) to groove of piston

    • Insert piston assembly into actuator housing and push with included dowel

    • Thread adapter fitting to actuator housing

    • Tighten adapter fitting to actuator housing using 1-1/4" and 1-1/16" wrench

    • Loosen 3/8" to 1/4" adapter from bleed down valve outlet adapter using......

    • Unthread 3/8" to 1/4" adapter from bleed down valve adapter

    • Loosen bleed down valve adapter from bleed down valve using.....

    • Unthread bleed down valve adapter from bleed down valve

    • Remove Seat from bleed down valve body

    • Remove Flow reducer from bleed down valve adapter

Author

with 2 other contributors

Adam Dumas

Member since: 5/20/13

36 Guides authored

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