How do you remove the master cylinder?

To remove the brake master cylinder, start by placing rags under the brake line fittings and preparing caps or plastic bags to cover the ends of the lines once they are disconnected. Then, use a flare-nut wrench to loosen the tube nuts at the ends of the brake lines where they enter the brake master cylinder. Pull the brake lines away slightly and plug the ends to prevent contamination. Remove the mounting nuts and disconnect the pushrod from the brake pedal. Move the bracket retaining the combination valve forward slightly and remove the brake master cylinder from the vehicle. Remove the reservoir covers and diaphragms, and discard any remaining fluid. Mount the brake master cylinder in a vise with blocks of wood to prevent damage. Remove the primary piston lock-ring and assembly, followed by the secondary piston assembly. Pry the reservoir from the cylinder body and remove the grommets. Do not attempt to remove the quick take-up valve. To overhaul the brake master cylinder, inspect the cylinder bore for corrosion and damage. If any is found, replace the brake master cylinder body. Lubricate and press the new reservoir grommets into the body, then press the brake master cylinder body onto the reservoir. Remove the old seals from the secondary piston assembly and install the new seals with the lips facing away from each other. Attach the spring retainer and lubricate the cylinder bore. Install the spring and secondary piston assembly, followed by the primary piston assembly and lock-ring. Inspect the reservoir cover and diaphragm, replacing any damaged parts. Insert threaded plugs into the cylinder outlet holes and fill the reservoirs with brake fluid. Loosen one plug at a time and push the piston assembly into the bore to force air out. Stroke the piston multiple times for each outlet to ensure all air is expelled. Refill the reservoirs and install the diaphragm and cover assembly. To install the brake master cylinder, reverse the removal steps and bleed the brakes.

Genuine Chevrolet Astro Brake Master Cylinder

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9 Brake Master Cylinders found

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Chevrolet Astro Cylinder Kit,Brake Master
Part Number: 18012918
$30.81 MSRP: $68.20
You Save: $37.39 (55%)
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Product Specifications
- Other Name: REPAIR KIT, Brake Master Cylinder; Master Cylinder Repair Kit, Overhaul Kit
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1985-1989 Chevrolet Astro | VAN ASTRO | 4 Cyl 2.5L, 6 Cyl 4.3L
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Chevrolet Astro Cylinder Asm,Brake Master
Part Number: 18029964
$115.90 MSRP: $360.76
You Save: $244.86 (68%)
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Product Specifications
- Other Name: CYLINDER, Brake Master Cylinder; Master Cylinder
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1990-1994 Chevrolet Astro | VAN ASTRO | 4 Cyl 2.5L, 6 Cyl 4.3L
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Chevrolet Astro Cylinder Asm,Brake Master
Part Number: 18029963
$216.44 MSRP: $321.80
You Save: $105.36 (33%)
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Product Specifications
- Other Name: CYLINDER, Brake Master Cylinder; Master Cylinder
- Replaces: 18015414
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1990-1995 Chevrolet Astro | VAN ASTRO | 4 Cyl 2.5L, 6 Cyl 4.3L
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Chevrolet Astro CYLINDER KIT
Part Number: 18047531
Product Specifications
- Other Name: CYLINDER KIT, Brake Master; Overhaul Kit
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2003-2005 Chevrolet Astro | VAN ASTRO | 6 Cyl 4.3L
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Chevrolet Astro Cylinder Asm,Brake Master
Part Number: 18047594
Product Specifications
- Other Name: CYLINDER, Brake Master Cylinder; Master Cylinder
- Replaces: 18029952
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1996-2002 Chevrolet Astro | VAN ASTRO | 6 Cyl 4.3L
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Chevrolet Astro Cylinder Kit,Brake Master Cylinder Repair
Part Number: 18023274
Product Specifications
- Other Name: CYLINDER KIT, Brake Master; Overhaul Kit
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1996-2002 Chevrolet Astro | VAN ASTRO | 6 Cyl 4.3L
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Chevrolet Astro Cylinder Asm,Brake Master
Part Number: 19209241
Product Specifications
- Other Name: CYLINDER
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2003 Chevrolet Astro | VAN ASTRO | 6 Cyl 4.3L
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Chevrolet Astro Cylinder Asm,Brake Master
Part Number: 19209257
Product Specifications
- Other Name: CYLINDER, Brake Master Cylinder; Master Cylinder
- Replaces: 18048897
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2003-2005 Chevrolet Astro | VAN ASTRO | 6 Cyl 4.3L
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Chevrolet Astro Master Cyl. Asm. Pkg.
Part Number: 18013440
Product Specifications
- Other Name: CYLINDER, Brake Master Cylinder; Master Cylinder
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1985-1989 Chevrolet Astro | VAN ASTRO | 4 Cyl 2.5L, 6 Cyl 4.3L

Chevrolet Astro Brake Master Cylinder

The Brake Master Cylinder used in Chevrolet Astro is a hydraulic assembly which is essential for the braking system and is used to transform the pressure exerted by the driver's foot into hydraulic pressure. This hydraulic pressure is then transferred to the slave cylinders which in turn release the brakes, so as to slow down or stop the vehicle. The master cylinder is composed of the pistons, seals, springs, and may have a cast iron or aluminium casing, fluid reservoirs can be either built in or can be separate depending on the year of manufacture. The Chevrolet Astro cars have dual circuit brake master cylinders to provide braking power in the event of a failure of one circuit. This design is safer than the previous one because it can continue to operate in the case of hydraulic failure.

Each OEM Chevrolet Astro Brake Master Cylinder we offer is competitively priced and comes with the assurance of the manufacturer's warranty for the part. Furthermore, we guarantee the speedy delivery of your orders right to your doorstep. Our hassle-free return policy is also in place for your peace of mind.

Chevrolet Astro Brake Master Cylinder Parts Questions & Experts Answers

Cylinder Asm,Brake Master
19209257
Q: How do you remove the master cylinder?
A: To remove the brake master cylinder, start by placing rags under the Brake Line fittings and preparing caps or plastic bags to cover the ends of the lines once they are disconnected. Then, use a flare-nut wrench to loosen the tube nuts at the ends of the brake lines where they enter the brake master cylinder. Pull the brake lines away slightly and plug the ends to prevent contamination. Remove the mounting nuts and disconnect the pushrod from the brake pedal. Move the bracket retaining the combination valve forward slightly and remove the brake master cylinder from the vehicle. Remove the reservoir covers and diaphragms, and discard any remaining fluid. Mount the brake master cylinder in a vise with blocks of wood to prevent damage. Remove the primary piston lock-ring and assembly, followed by the secondary piston assembly. Pry the reservoir from the cylinder body and remove the grommets. Do not attempt to remove the quick take-up valve. To overhaul the brake master cylinder, inspect the cylinder bore for corrosion and damage. If any is found, replace the brake master cylinder body. Lubricate and press the new reservoir grommets into the body, then press the brake master cylinder body onto the reservoir. Remove the old seals from the secondary piston assembly and install the new seals with the lips facing away from each other. Attach the spring retainer and lubricate the cylinder bore. Install the spring and secondary piston assembly, followed by the primary piston assembly and lock-ring. Inspect the reservoir cover and diaphragm, replacing any damaged parts. Insert threaded plugs into the cylinder outlet holes and fill the reservoirs with brake fluid. Loosen one plug at a time and push the piston assembly into the bore to force air out. Stroke the piston multiple times for each outlet to ensure all air is expelled. Refill the reservoirs and install the diaphragm and cover assembly. To install the brake master cylinder, reverse the removal steps and bleed the brakes.