Select Page

DD502S | Bus steering axle

The Dongfeng Dana Coach Axle DF502S is a high-performance I-beam steering axle based on the F5.0 platform with a rated load of 5000 kg.

It adopts a fixed wheelbase of 2363 mm with a precision layout and a rim mounting distance of 2086 mm without adjustment. Standard air brake system (compatible with 19.5″ rims), with a kingpin center distance of 1753 mm to enhance steering rigidity, and an exclusive 120+25 mm composite front axle drop (the highest in the series) significantly improves maneuverability on complex terrain;

Compatible with 245/70R19.5 wide-base tires and 7.50×19.5 rims, with an outer wheel steering angle of 49° (industry-leading level), and a kingpin inclination of 9°/0.5° to optimize handling stability. Standard equipped with 8-M20×1.5 high-strength bolts and compatible with maintenance-free hub units.

We provide full life cycle services for all customers, from design to power system supply, from installation to commissioning, from after-sales service training to spare parts supply, from trouble shooting to overhaul technical support.

DD502S Product Features

  • Heavy-duty upgrade: Covers the 4.2–5.0 ton class, with precision casting + alloy steel reinforcement for the bridge body, improving torsional rigidity by 30% to meet the heavy-duty requirements of intercity/tourist buses.

  • Ultra-quiet operation: Spiral bevel gear grinding process + active noise reduction technology, with NVH optimization of 45% and driving noise ≤62dB.

  • All-around safety braking: Standard dual-circuit air brakes + EBS + ABS (5.0-ton models support hydraulic retarder), response time ≤0.15 seconds, braking efficiency improved by 20%.

  • Maintenance-free design: IP6K9K sealing + intelligent centralized lubrication, key components (bearings/gears) with a lifespan of 500,000 kilometers, maintenance intervals exceeding 10,000 kilometers.

Technical Specifications

Category:Technical Parameters
Platform:DD502S
Basic Structure:I-beam
Rated Load (kg):5000
Brake Structure/Specifications:Air brake/19.5″
Maximum External Width A (mm):2363
Rim Installation Distance B (mm):2086
Kingpin Center Distance C (mm):1753
Spring Distance D (mm):932
Front Axle Drop (mm):120+25
Kingpin Inclination/Wheel Camber:9°/0.5°
Inner Wheel Steering Angle/Outer Wheel Steering Angle:49°
Rim:7.50×19.5
Tire:245/70R19.5
Wheel Bolts:8-M20×1.5
Wheel Bolt Circle E (mm):φ275
Wheel Toe (mm):1 – 3
Air Chamber Interface Dimensions:NPT1/4、Z1/4、M16×1.5
Optional Information:Maintenance-Free Hub Unit
Lead Time:15 – 30 Working Days
Payment Terms:T/T, L/C

 

coming soon

coming soon

coming soon

Model

Rated Load (Kg)

Brake Structure Form/Specification

Maximum Overall Width A (mm)

Rim

Tire

Wheel Bolt

DD502S5000Air brake/19.5″23637.50×19.5245/70R19.58 – M20×1.5
DF501S5000Air brake/φ400×130、φ400×150、22.5″2173 – 25218.25×22.511.00R22.510 – M20×1.5
DF451S4500Air brake/φ400×130、19.5″2220 – 23427.50×19.5245/70R19.58 – M20×1.5
DF421S4200Air brake/φ360×130、φ400×130、19.5″2205 – 24727.50×19.5245/70R19.58 – M20×1.5
——END——

Basic information of bus steering axle

CategoryTechnical ParameterBasic Structure FormI – beam
Rim Mounting Distance B (mm)2086Kingpin Center Distance C (mm)1753
Spring Distance D (mm)932Front Axle Drop (mm)120 + 25
Kingpin Inclination Angle/Wheel Camber Angle9°/0.5°Inner Wheel Steering Angle/Outer Wheel Steering Angle49°
Wheel Bolt Distribution Circle E (mm)φ275Wheel Toe – in (mm)1-3
Air Chamber Interface SizeNPT1/4、Z1/4、M16×1.5Optional InformationMaintenance – free Hub Unit
——END——

DCEC EQB125-20 Automotive Engine DATASHEET

Note: All Above Data are Just for Reference, All Data Might Change Without Notices or Updates, Please Contact Our Sales Team to Confirm All Details Via WhatsApp or Email.

The picture of Sale Manual showing the accessories and scopes of supply.

Sale Manual

The picture of Installation Drawing showing the accessories and scopes of supply.

Installation Drawing

The picture of Installation Manual showing the accessories and scopes of supply.

Installation Manual

The picture of Operation Manual showing the accessories and scopes of supply.

Operation Manual

The picture of Engine Parts Catalogue showing the accessories and scopes of supply.

Parts Catalogue

The picture of Test Report and Certifcate showing the accessories and scopes of supply.

Report & Certifcate

Global Activity

WhatsApp Online logo

Online Service


Sales Director-Mr.Jasper Lee

Sales Manager-Mrs.Wendy Fu

Spare Parts Sales-Miss. Nora Cao

After-Sales Manager-Mr. Jason Zhang

Merchandiser-Miss. Yoyo Tao

Contact EMAC Now!

Subscribe To Our Newsletter

Subscribe to get the latest updates from www.dongfeng-dana.com

You have Successfully Subscribed!

Pin It on Pinterest