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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.
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 automotiv... 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 automotiv...
