Product Description
The ability to stop a heavy bus safely and predictably rests
entirely on the performance of its braking system. The very heart
of this system is the Brake Master Cylinder and Vacuum Booster Assembly. Nanjing Dingguan Auto Parts Co., Ltd. offers this premium,
integrated unit, part number 3506-05711, engineered as the definitive replacement for Yutong buses.
This assembly is responsible for converting the driver's pedal
pressure into powerful hydraulic force, while the booster amplifies
that force for low-effort, confident braking.
Key Features & Benefits:
- Integrated for Simplicity: This is a pre-assembled unit, combining the master cylinder and
vacuum booster. This simplifies installation, saves valuable labor
time, and eliminates the risk of leaks or mismatched components.
- Restores Braking Power: A failing unit results in a "spongy" or hard pedal and dangerously
reduced stopping power. This replacement restores the firm,
responsive pedal feel and the powerful braking performance your
drivers need to operate safely.
- Guaranteed OEM-Standard Fit: Engineered as a direct replacement for Yutong part 3506-05711, it
guarantees a perfect, bolt-on fit and seamless integration with the
vehicle's hydraulic lines and mounting points.
- Built for Reliability: Constructed with high-grade seals to prevent fluid and vacuum
leaks and a corrosion-resistant finish, this assembly is built to
withstand the demands of commercial use, ensuring a long and
dependable service life.
As a specialized manufacturer, Nanjing Dingguan is committed to
providing safety-critical components that meet the highest
standards.
Contact us today to request a quote and restore the braking
integrity of your Yutong fleet.
specification
Product Name: | Master cylinder with vacuum booster | Part Number; | 3506-05711 |
Quality control: | ISO 9001/GB 12676 | Size: | standard |
| Type: | Braking system | Place of origin: | Nanjing, China |
Materials: | aluminum alloy | Packaging: | Paper packaging/custom packaging |
Minimum order quantity: | 1 | Application: | bus |
Status: | brand new | Cargo transportation: | TNT, EMS, UPS, FedEx, DHL or according to your requirements. |
Customs code: | 3506-05711 | Factory quality inspection: | 100% inspection |
Product detailed pictures

How to buy the right bus accessories
| 1.Please provide VIN number |
| 2.Please provide clear photos |
| 3.Please provide the OEM number |
| 4.lf you are unsure, please contact us. |

Nanjing Dingguan Auto Parts Co., Ltd.
-- Your reliable partner for bus spare parts.
About Us
Q1: What is the main function of this Brake Master Cylinder with
Vacuum Booster assembly?
A1: This assembly serves a critical dual function. The vacuum booster significantly amplifies the force you apply to the brake pedal,
making braking easier and more effective . The master cylinder then converts this amplified force into hydraulic pressure, which
is distributed to the wheel brakes to stop the vehicle reliably .
This is especially important for heavy vehicles like buses.
Q2: How can I be sure this assembly is compatible with my Yutong
bus?
A2: This product is engineered as a direct OEM (Original Equipment Manufacturer) replacement specifically for Yutong buses. To guarantee a perfect fit and
optimal performance, please confirm that your vehicle's required
part number is PN: 3506-05711.
Q3: Why is a vacuum booster important for a bus braking system?
A3: Buses are heavy and require substantial stopping power. The vacuum
booster utilizes engine vacuum or a vacuum pump to create a
pressure difference that boosts your pedal force . This means the driver doesn't need to exert excessive effort to
achieve strong, safe braking, which reduces fatigue and enhances
safety during frequent stops.
Q4: Is this unit built to last under demanding operating
conditions?
A4: Yes. We focus on the durability of our products. This assembly is
manufactured to meet or exceed stringent quality standards,
featuring robust construction and high-quality materials to withstand the daily demands of
commercial bus operation . This ensures consistent performance and
helps minimize downtime.
Q5: What about the sealing and internal components?
A5: The product is designed with reliable sealing to maintain proper
hydraulic pressure and prevent leaks . Furthermore, the vacuum
booster part of the assembly ensures effective operation by
maintaining a tight seal to utilize the vacuum source, which is
crucial for generating the necessary power assistance .
Q6: Is professional installation recommended?
A6: Yes. While it is designed as a direct replacement, we highly
recommend that installation and any subsequent brake system
bleeding are performed by a qualified technician. Proper installation is critical for ensuring optimal performance and vehicle safety.
Q7: What kind of warranty supports this product?
A7: We stand behind the quality of our products. This brake master
cylinder and vacuum booster assembly is backed by a warranty that
covers defects in workmanship and materials. For specific warranty
terms and duration, please contact the seller or refer to the
product documentation.
Nanjing Dingguan Automotive Parts Co., Ltd. specializes in
providing high-quality and cost-effective parts for buses and
commercial vehicles. We focus on the global market, have rich
experience in exporting bus and truck parts, provide services to
distributors and fleet operators, and provide tailor-made solutions
to meet different needs.
Warehouse and cargo display

About shipping and packaging
transportation | TNT, EMS, UPS, FedEx, DHL or as per your requirement. |
| packaging | Bubble wrap, cartons, wooden boxes, and pallets are used to avoid
damage to goods caused by bumps. |

common problem
1: Can you provide an accurate price? |
| Sure. You need to provide the vehicle VIN number, provide the
product OEM code, or provide a clear product photo. |
2: What's your minimum order quantity? |
| No minimum order quantity, of course, if you buy more items from
our company, you can get preferential prices and discounts. |
3: What's the delivery time? |
Air freight orders take 5 to 8 days. Sea freight orders take 15 to
25 days. |
My advantage
1:High-Quality Bus Components |
| Specialized in premium aftermarket bus parts including engines,transmissions, and braking systems, built for durability and
performance. |
| 2:Comprehensive spare parts solution |
| We offer a full range of bus accessories: filters, suspension
components, electrical components, and interior accessories for all
major bus brands. |
3: ISO-Certified Manufacturing |
Our ISO 9001/TS 16949-certified products ensure strict quality
control, reliability, and compliance with international
standards.ISO |
4: Global Bus Part Coverage |
Our products are compatible with leading bus models from Europe,
Asia, and the Americas. |
5;Extensive product catalog |
Engine parts, HVAC systems, lighting, wheels and safety components
covering city, intercity and long-distance buses. |
Contact Us