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Home >> Chrysler >> 2009 >> 300 Signature Series >> Repair and Diagnosis >> External Pages >> Different car >> Section 330 (Mechanical Brake System - Base (Service Information)) >> Hydraulic/Mechanical >> MASTER CYLINDER, Brake >> Standard Procedure >> Master Cylinder Bleeding

Master Cylinder Bleeding

WARNING: This page is about a different car, the 2010 Dodge Charger and 2010 Chrysler 300. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION: When clamping master cylinder in vise, only clamp master cylinder by its mounting flange. Do not clamp master cylinder piston rod, reservoir, seal or body.
  1. Clamp master cylinder in a vise.
    Fig 1: Bleeding Tools On Master Cylinder - MK25E
    GC0095171Courtesy of CHRYSLER LLC
    CAUTION: When installing Adapters in master cylinder, do not overtighten. Damage to master cylinder could occur.
    NOTE: Bleeder Adapters 9748-1 and 9748-2 are not interchangeable. To avoid mix-up, Bleeder Adapter 9748-1 is silver while Bleeder Adapter 9748-2 is black.
  2. Attach special tools for bleeding master cylinder in following fashion:
    1. Thread Adapter (3), Special Tool 9748-2, into primary outlet port. Tighten Adapter to 14 N.m (124 in. lbs.).
    2. Thread Adapter (4), Special Tool 9748-1, into secondary outlet port. Tighten Adapter to 14 N.m (124 in. lbs.).
    3. Thread a Bleeder Tube (2), Special Tool 8358-1, into each Adapter. Tighten each tube to 14 N.m (124 in. lbs.). Flex each bleeder tube and place open end into mouth of fluid reservoir as far down as possible.
    Fig 2: Reservoir Fluid Level Markings
    GC0095169Courtesy of CHRYSLER LLC
    NOTE: Make sure open ends of bleeder tubes stay below surface of brake fluid once reservoir is filled to proper level.
  3. Fill brake fluid reservoir (1) to the MAX level with Mopar® brake fluid or equivalent conforming to DOT 3 specifications. Make sure fluid level is above tips of bleeder tubes in reservoir to ensure no air is ingested during bleeding.
    Fig 3: Bleeding Tools On Master Cylinder - MK25E
    GC0095171Courtesy of CHRYSLER LLC
  4. Using a wooden dowel as a pushrod (1), slowly depress master cylinder pistons, then release pressure, allowing pistons to return to released position. Repeat several times until all air bubbles are expelled. Make sure fluid level stays above tips of bleeder tubes in reservoir while bleeding.
  5. Remove bleeder tubes (2) and adapters (3, 4) from master cylinder outlet ports, then plug outlet ports and install fill cap on reservoir.
  6. Remove master cylinder from vise.
  7. Install master cylinder on vehicle. See Brakes/Hydraulic/Mechanical/MASTER CYLINDER, Brake - Installation .
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