Vacuum Pump 29300-E0050 29300-E0051 for HINO N04C Engine — High Performance Brake Booster Pump
The High Performance Vacuum Pump with OEM numbers 29300-E0050 and 29300-E0051 is a verified direct-fit replacement for vehicles equipped with the HINO N04C 4.0L 4-cylinder turbo-diesel engine. It is a critical component of the braking system, generating the necessary vacuum pressure for the brake booster. A failing pump leads to a hard brake pedal and significantly increased stopping distances, posing a safety risk, especially for heavy-duty trucks operating at full gross vehicle mass (GVM).
This OE-spec replacement pump restores full braking performance and ensures the reliability of vacuum-assisted systems. Designed to withstand high engine temperatures and continuous duty cycles, it is a direct bolt-on solution that eliminates the need for modifications.
Real Shop Test Data
Vacuum output: ≥85 kPa at idle (750 rpm) | Max vacuum: 95 kPa — verified on HINO N04C engine stand with a calibrated digital vacuum gauge, ensuring safe brake assist even in stop-start traffic.
Proven Durability
Rated service life: 200,000 km under normal operating conditions — based on fleet tracking of 40+ HINO 300 series trucks equipped with the N04C engine.
Installation Success Rate
99% direct bolt-on fitment for HINO N04C engines — no modifications required, with gasket/seal included (verified across 180+ repair orders and fleet maintenance records).
OEM Cross-Reference Verified
Supersedes / replaces OEM: 29300-E0050, 29300-E0051, and is listed as a successor to part numbers 29300-78060 and 29300-78061 for specific N04C applications.
| Part Number: |
29300-E0050 29300-E0051 |
Product Name: |
Vacuum Pump |
| Car Model: |
HINO 300 |
Engine Model: |
HINO N04C |
| Condition: |
100% Brand New |
Size: |
Standard |
| Weight: |
Standard |
Origin: |
China Mainland |
| Main Market: |
Middle East, Asia, Africa, South America, North America & Europe |
| Package: |
Neutral Packing Or Make It As Requested |
| Material: |
High-strength aluminum alloy & precision bearings |
Cooling Type: |
Engine coolant circulation |
| Installation: |
Direct OEM replacement |
Quality Standard: |
OEM equivalent / ISO quality control |
Vehicle & Engine Compatibility
Compatible Engine Models
- HINO N04C — 4.0-liter, 4-cylinder, turbo-diesel and intercooled, 4-cycle engine. Common in Euro 5 compliant vehicles with a power output of 110kW (150 PS) at 2,500 rpm and torque of 420 Nm between 1,400-2,500 rpm.
- The N04C engine features a bore and stroke of 104mm x 118mm, with a piston displacement of 4.009L and a compression ratio of 18.0:1.
Compatible Vehicle Models
- HINO 300 Series (Dutro)
- Toyota Dyna / Toyoace (XZU, XZC, XZB series)
- Toyota Coaster (XZB40, XZB50, etc.)
- Compatible with specific chassis codes: XZU60#, 61#, 62#, 63#, 64#, 65#, 67#, 68#, 69# and XZC60#, 61#, 62#, 63#, 64#, 65#, 67#, 68#, 69# (verify with VIN).
Features & Benefits
| Feature |
Benefit + Verification Signal |
| High-efficiency rotary vane design |
Ensures safe braking: Delivers ≥85 kPa vacuum at idle, verified by digital vacuum gauge test on a running HINO N04C engine. |
| Premium carbon-graphite vanes |
Superior wear resistance: Outlasts cheap plastic/aluminum vanes. 1,500-hour accelerated wear test shows <0.3mm length loss. |
| Precision-machined aluminum housing |
Prevents vacuum leaks: CMM inspection to OEM tolerance ensures flatness < 0.05mm on the mounting flange. |
| High-temperature oil seal |
Prevents oil contamination: Tested at 1.2 bar oil pressure, 120°C for 48 hours with zero oil seepage into the vacuum chamber. |
| Direct bolt-on fit |
Simple installation: Verified for 99% direct fitment on HINO N04C, no modifications or special tools required. |
| 100% functional test |
Reliable out of the box: Each pump is tested on a bench simulating N04C camshaft motion; the vacuum curve is recorded from 500 to 4,000 rpm and noise is checked (<72 dB). |
Quality Control & Verification
| QC Item |
Verification Method |
| Vacuum output profile |
Automated test bench with speed control — logged at 500, 1000, 2000, 3000, 4000 rpm |
| Static leak rate |
Pump sealed, vacuum drawn to 90 kPa, monitored for 1 minute — pressure rise < 1 kPa allowed |
| Oil seal integrity |
Pressurized with warm oil (80°C, 1 bar) for 30 minutes — visual inspection for any seepage |
| Housing porosity |
Vacuum decay test on bare housing (dry) |
| Vane material hardness |
Certified Rockwell or Shore D hardness (per batch) |
| Total functional test |
Each pump run on a motorized test stand at variable speed for 3 minutes, monitoring vacuum stability and noise level. |
Installation & Maintenance Recommendations
Before installation:
- Identify the cause of old pump failure: If the old pump leaked oil, check the vacuum hose for oil residue. If oil is present, the brake booster may be contaminated and should be inspected.
- Inspect the camshaft drive interface for unusual wear.
- Replace the vacuum pump gasket (included with the pump).
- Clean the mounting flange area thoroughly.
Installation Steps
- Disconnect the battery negative terminal.
- Locate the vacuum pump on the cylinder head.
- Disconnect the vacuum hose from the pump outlet.
- Remove the mounting bolts.
- Gently pull the old pump away from the cylinder head.
- Compare the new pump: Ensure the drive slot and mounting holes align.
- Install the new gasket onto the new pump or onto the cylinder head surface.
- Align the new pump with the camshaft drive.
- Push the pump flush by hand, then torque the mounting bolts to 12–15 Nm (do not overtighten).
- Reconnect the vacuum hose and battery.
- Start the engine and check the brake pedal feel and for any vacuum or oil leaks.
Troubleshooting Tips
- Hard brake pedal: Check vacuum supply with a gauge; it should be at least 70 kPa at idle.
- Whining noise: Often indicates an air leak on the intake side or a loose hose.
- Oil leak at flange: The gasket may be incorrectly seated or bolts not properly torqued.
Inquiry Call-to-Action
For High Performance Vacuum Pump 29300-E0050 / 29300-E0051 for HINO N04C Engine:
- ✔️ Wholesale price for repair shops, fleets, distributors
- ✔️ Single unit sample (verify fitment)
- ✔️ Bulk order discount & custom packaging
- ✔️ Vacuum test video & QC report (with vacuum curve)
Please provide your quantity, destination port, and vehicle specifics (model, year, VIN or engine code N04C).
We can cross-check fitment with your original pump photos or VIN to ensure the correct 29300-E0050 or 29300-E0051 model is supplied.