Harley-Davidson X440 / X440T Front Brake Master Cylinder Repair Kit | HDH45530ACP000S

Harley-Davidson X440 / X440T Front Brake Master Cylinder Repair Kit – HDH45530ACP000S

Service the front hydraulic brake master cylinder on confirmed Harley-Davidson X440-family motorcycles with the genuine Cylinder Set Master – HDH45530ACP000S.

The factory description is CYLINDER SET MASTER. In buyer and workshop terminology, this is the front brake master-cylinder repair / internal service set. It is used to service the internal hydraulic components of the front master cylinder when the master-cylinder body and bore remain serviceable.

This is not the complete front master-cylinder assembly. It does not include the complete master-cylinder body, front brake lever, reservoir assembly, brake hose or caliper unless a component is physically included inside the sealed factory pack.

What This Product Is

• Genuine Harley-Davidson / Hero-supply-chain brake service component
• Official description: CYLINDER SET MASTER
• Part number: HDH45530ACP000S
• System: Front hydraulic brake master cylinder
• Buyer name: Front brake master-cylinder repair kit / piston service set
• Quantity: 1 set
• Catalogue price / MRP shown: ₹233

Confirmed Compatibility

These three applications are confirmed from the exact HDH45530ACP000S rows in the supplied Harley-Davidson parts sheets.

Why This Is the Front Master-Cylinder Service Set

The X440 parts sheets place HDH45530ACP000S inside the front-brake component group alongside the front brake disc, front sensor ring, brake lever set, master-cylinder sub assembly, master-cylinder cap and clamp lever.

The X440 owner’s manual identifies the front brake master cylinder/reservoir at the right handlebar. The rear brake master cylinder is a separate component located near the rear brake pedal.

What It Is Commonly Called

• X440 front master-cylinder repair kit
• X440 brake master-cylinder piston kit
• X440 master-cylinder service kit
• X440 front brake pump repair kit
• Cylinder Set Master
• HDH45530ACP000S

When This Part May Be Required

A technician may inspect or replace the master-cylinder internal service set when there are symptoms such as:

• Front brake lever not building normal hydraulic pressure
• Brake fluid leaking from the piston / lever-side area
• Brake lever slowly sinking under steady pressure
• Internal seal wear or master-cylinder piston wear
• Front master-cylinder overhaul during brake-system repair

These symptoms can also be caused by air in the system, a damaged hose, leaking banjo washers, caliper problems, contaminated brake fluid or a damaged master-cylinder bore. Proper diagnosis is required before replacing parts.

Important – This Is Not the Complete Master Cylinder

This listing is for the CYLINDER SET MASTER internal service set only.

The parts sheets separately list:

• Master-cylinder sub assembly set
• Master-cylinder cap
• Clamp lever
• Switch set
• Reservoir cover set

Do not order this item if the complete master-cylinder housing is cracked, heavily corroded, badly scored or otherwise beyond service limits.

Fitment / Return Prevention Note

Master-cylinder internal sets can look very similar while differing in piston diameter, seal profile, spring length or hydraulic specification.

Before ordering, confirm:

• Exact SKU HDH45530ACP000S
• Motorcycle model and production generation
• Original front master-cylinder assembly
• Existing piston / seal specification
• Master-cylinder bore condition
• Correct brake-fluid specification

Do not substitute the Hero-market 45530ACP000S or another 45530-series kit solely because the base number appears similar. Use the exact HDH SKU for the confirmed Harley-Davidson application.

What You Will Receive

• 1 x Genuine Cylinder Set Master
• Part number: HDH45530ACP000S

The exact internal pieces supplied are determined by the sealed factory package.

Not Included Unless Physically Packed

• Complete front master-cylinder body
• Front brake lever
• Reservoir / reservoir cap
• Brake hose
• Banjo bolt
• Sealing washers
• Front brake caliper
• Brake fluid
• Bleeding tools

Technical Details

Installation & Safety Note

This is a safety-critical braking component. Installation should be carried out by a qualified motorcycle technician.

The technician should:

• Inspect the master-cylinder bore for scoring, corrosion and pitting
• Replace the complete master-cylinder assembly if the bore is beyond service limits
• Keep hydraulic seals free from grease, mineral oil, fuel and dirt
• Use the brake-fluid specification specified for the motorcycle
• Inspect the brake hose, banjo fittings and sealing washers
• Bleed the hydraulic system completely after repair
• Check for fluid leaks
• Confirm firm and consistent front-brake lever pressure
• Perform a controlled low-speed braking test before normal riding

Do not ride the motorcycle if the front brake feels spongy, loses pressure, leaks fluid or does not operate consistently.

Brake-Part Return Note

Confirm fitment before opening the sealed package. A hydraulic brake component that has been installed, contaminated or exposed to brake fluid cannot be treated as an unused part.

Buyer-Focused FAQs

Q1. What is HDH45530ACP000S?
It is the genuine Cylinder Set Master used to service the front brake master cylinder on confirmed Harley-Davidson X440-family motorcycles.

Q2. Does it fit the original Harley-Davidson X440?
Yes. X440 September 2023 is confirmed.

Q3. Does it fit X440 OBDII?
Yes. X440 OBDII May 2025 is confirmed.

Q4. Does it fit the Harley-Davidson X440T?
Yes. X440T January 2026 is confirmed.

Q5. Is this for the front or rear brake?
Front brake. It belongs to the front master-cylinder assembly on the right handlebar.

Q6. Is this the complete master cylinder?
No. It is the internal Cylinder Set Master / master-cylinder repair set.

Q7. Does it include the front brake lever?
No. The brake lever is a separate component.

Q8. Does it include brake fluid?
No.

Q9. Can this repair a badly scored master-cylinder bore?
Not necessarily. If the master-cylinder body or bore is damaged beyond service limits, the complete master-cylinder assembly should be replaced.

Q10. What is the catalogue price?
₹233 in the supplied X440 Sept 2023, X440 OBDII May 2025 and X440T Jan 2026 parts sheets.

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