www.teamwbi.com / e-mail: [email protected] / 800-842-7285
Cylinder, Brake Master
Application: 1987-1994 LLV
Part Number: 19209219
Kit Contents
Quantity
N/A
Part Number
N/A
Description
N/A
Required Tools
Quantity
1
1
Size
8MM
Description
Wrench
Pin Punch, or Phillips Screw Driver
Procedure:
1. Remove the brake master cylinder from the packaging and place into a bench-top vise.
2. Remove all caps/covers (one black covering the bleeder screw and two blue covering the
reservoirs) take note to remove the white plastic deflectors (pictured below):
1
WBI-WI-19209219
3/3/2017
3. CAUTION: Do not mix fluid. If a different fluid than DOT 5 was included in the brake
circuit, it is necessary to purge the entire system.
Install threaded plugs to cover the outlets of the master cylinder and fill the reservoirs with DOT 5
Brake Fluid. Outlets must be dead-headed (plugged) before air can be purged using the bleeder
valve. Seals utilized throughout the LLV brake circuit are specifically formulated for compatibility
with DOT 5 Brake Fluid.
4. Once the reservoirs are filled with DOT 5 Brake fluid, using the pin punch or Phillips screw driver
depress/stroke the piston as far as possible and release (this activity is purging air from and drawing
fluid into the body).
2
WBI-WI-19209219
3/3/2017
5. CAUTION: As the brake master cylinder is being bled, fluid levels will decrease. Take care
to ensure fluid remains in the reservoir otherwise during depress/stroke and release, air can be
pulled back into the cylinder.
Repeat Step 4, until air bubbles are no longer being evacuated from the rearmost (front circuit)
reservoir. Fluid fill will be confirmed when instead of bubbles; a fluid stream rises from the opening
in the reservoir.
6. Using the 8mm wrench open the bleeder screw at the end of the body (forward of the small
reservoir) as you depress/stroke the piston with the pin punch/phillips screw driver.
Note: The purpose/location of the bleeder screw is to ensure an appropriate bench bleed. Make sure
to close bleeder screw prior to releasing the piston.
7. Repeat Step 6 ensuring to close the bleeder screw prior to releasing the piston during each stroke
(as this will draw air back into the body). Once a steady fluid stream is witnessed flowing from the
bleeder (absent of air bubbles), close the bleeder screw.
8. Ensure to fill the reservoirs to the appropriate levels prior to install on the vehicle. When
attempting to depress/stroke the piston, it should require a great deal of effort and have a limited
stroke when an appropriate bench bleed is executed.
Note: Do not overfill the reservoirs. The master cylinder is equipped with an air pressure relief in the
reservoir and if overfilled, fluid can escape through the relief suggesting leaks from either the master
cylinder or adjacent brake components.
9. Install on the vehicle and utilize preferred system bleeding method (power bleed, vacuum bleed,
and two-person pedal).
Note: If air is present in your brake circuit, this can lead to a feeling of “soft-pedal” as air is
compressible.
10. For other questions or brake system needs, contact your Wheeler Bros., Inc. representative for
assistance.
3
WBI-WI-19209219
3/3/2017