Yimi (Guangzhou) Automotive Parts Co, Ltd
| Vacuum Seal Testing | 100% vacuum seal testing |
| Payment Terms | T/T, |
| Material | High-strength steel housing + Aluminum alloy components |
| Right-Hand Version | 1-47800404-AG / 147800404AG |
| Delivery Time | 5-8 Work Days |
| Durability Validation | 100,000 brake cycles |
| OEM Part Number | 1-47800404-2 / 1478004042 |
| Certifiion | ISO/TS16949 |
| Associated Number | 1-47800404-0 / 1478004040 |
| Compatible Models | ISUZU FTR113, FV515 Heavy-Duty Trucks |
| Supply Ability | 10000 pcs/month |
| Part Type | Vacuum Booster / Air Master Booster |
| Packaging Details | Neutral Package or as customers’ request |
| Model Number | 6BG1 6BD1 4BD1 FSR NPR |
| Place of Origin | CHINA |
| Brand Name | YIMI |
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Product Specification
| Vacuum Seal Testing | 100% vacuum seal testing | Payment Terms | T/T, |
| Material | High-strength steel housing + Aluminum alloy components | Right-Hand Version | 1-47800404-AG / 147800404AG |
| Delivery Time | 5-8 Work Days | Durability Validation | 100,000 brake cycles |
| OEM Part Number | 1-47800404-2 / 1478004042 | Certifiion | ISO/TS16949 |
| Associated Number | 1-47800404-0 / 1478004040 | Compatible Models | ISUZU FTR113, FV515 Heavy-Duty Trucks |
| Supply Ability | 10000 pcs/month | Part Type | Vacuum Booster / Air Master Booster |
| Packaging Details | Neutral Package or as customers’ request | Model Number | 6BG1 6BD1 4BD1 FSR NPR |
| Place of Origin | CHINA | Brand Name | YIMI |
| High Light | OEM Standard Brake Vacuum Booster ，High-strength steel housing Brake Vacuum Booster ，100 ，000+ Brake Cycle Durability Brake Vacuum Booster | ||
The ISUZU Brake Vacuum Booster with OEM numbers 1-47800404-2 / 1478004042 is a precision-engineered replacement designed for ISUZU FTR113 and FV515 series heavy-duty trucks. This component is a core power amplifiion element of the vehicle's hydraulic brake/air-over-hydraulic brake system, responsible for amplifying the driver's braking force using engine intake manifold vacuum (or compressed air), making braking operations easier, more responsive, and reducing stopping distance.
The brake vacuum booster amplifies braking force using vacuum generated by the engine intake manifold during operation. The booster interior is divided by a diaphragm (or piston) into two chambers: one side connected to the engine intake manifold via a vacuum line (vacuum chamber), and the other side open to the atmosphere (atmospheric chamber). When the driver depresses the brake pedal, the push rod actuates the control valve, allowing atmospheric air to enter the atmospheric chamber. The resulting pressure differential pushes the diaphragm to generate an assist force, which combines with the driver's pedal force and transmits to the brake master cylinder, producing greater hydraulic pressure with less pedal effort.
Inspect immediately if any of these symptoms occur:
| Symptom | Probable Cause |
|---|---|
| Brake pedal feels stiff and hard to press; requires excessive effort | Damaged booster diaphragm or blocked/leaking vacuum line; insufficient vacuum |
| Brake pedal feels spongy with increased travel; noticeably reduced braking force | Aged internal seals; reduced boosting effectiveness |
| Engine idles rough or stalls when brake pedal is pressed | Internal vacuum leak affecting engine intake manifold vacuum |
| Hissing sound during braking | Booster housing or diaphragm damaged; vacuum leak |
| Brake pedal fails to return or returns slowly | Stuck internal valve spool or failed return spring |
| Increased stopping distance | Booster unable to provide adequate assist |
| Part Number: | 1-47800404-2 1478004042 |
| Product Name: | Brake Vacuum Booster |
| Car Model: | FTR113 FV515 |
| Engine Model: | ISUZU |
| Condition: | 100% Brand New |
| Material: | High-strength aluminum alloy & precision bearings |
| Origin: | China Mainland |
| Brand | Model Series | Chassis | Notes |
|---|---|---|---|
| ISUZU | FTR | FTR113 | Heavy-duty truck |
| ISUZU | FV | FV515 | Heavy-duty truck |
| ISUZU | FSR | — | Medium-duty truck (verify configuration) |
| ISUZU | FVR | — | Medium-duty truck (verify configuration) |
Company Details
Business Type:
Manufacturer,Distributor/Wholesaler,Exporter,Trading Company,Seller
Year Established:
2005
Total Annual:
8000000-10000000
Employee Number:
100~150
Ecer Certification：
Verified Supplier
Yimi (Guangzhou) Automotive Parts Co., Ltd. Located in Guangzhou—the economic and transportation hub of Southern China—we are a specialized supplier and exporter with over 20 years of experience in the automotive parts industry. We focus on the production and sales of high-quality ... Yimi (Guangzhou) Automotive Parts Co., Ltd. Located in Guangzhou—the economic and transportation hub of Southern China—we are a specialized supplier and exporter with over 20 years of experience in the automotive parts industry. We focus on the production and sales of high-quality ...
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