Product Name: Front Wheel Inner Bearing (Tapered Roller Bearing)
OEM Number: 81.93420.0074
Also Known As: 3017 bearing / 33214X3 / 06.32499.0043
Brand: SHACMAN (Shaanxi Automobile Group) compatible / OEM grade
Application: SHACMAN Delong F2000 series heavy duty trucks, also compatible with F3000, X3000, M3000, Sinotruk HOWO, and Steyr

--- WHAT IT IS ---

The 81.93420.0074 is the front wheel inner bearing for SHACMAN Delong F2000 heavy duty trucks, also known as the 3017 bearing or 33214X3. This is a tapered roller bearing specifically designed for the MAN 7.5 ton front axle, which is the standard front axle on Delong F2000 series trucks.

Tapered roller bearings are engineered to withstand both radial loads (vehicle weight) and axial loads (cornering forces). In the front wheel hub assembly, two tapered roller bearings work together: the inner bearing (81.93420.0074) and the outer bearing (81.93420.0081 / 32310). The inner bearing is the larger of the two, positioned closer to the vehicle center line, bearing the majority of the load.

This bearing is manufactured from high carbon chromium bearing steel (GCr15 or equivalent) with precision ground raceways and rollers for smooth rotation and long service life. It is a serviceable component that can be replaced during routine wheel end maintenance or when bearing failure occurs.

--- THE PROBLEM IT SOLVES ---

Heavy duty truck front wheel bearings operate under extreme conditions: constant high speed rotation, heavy loads, road shocks, water intrusion, and temperature fluctuations. Over time, the original bearing may develop several failure modes: pitting or spalling on the rollers or raceways, excessive radial or axial play, rough rotation or grinding noise, overheating (blue discoloration on the bearing), corrosion from water or salt intrusion, or complete cage failure leading to wheel lockup.

Symptoms of worn front wheel bearings include humming or grinding noise that changes with vehicle speed, vibration in the steering wheel, uneven tire wear, ABS sensor errors, or visible wheel wobble when the hub is lifted. A failed front wheel bearing is a critical safety hazard that can lead to wheel separation.

This replacement bearing restores proper wheel end function, eliminating noise and vibration, maintaining correct wheel alignment, and ensuring safe vehicle operation. Using an OEM grade tapered roller bearing is essential because the front wheel hub carries the entire front axle weight plus dynamic cornering loads.

--- WHY CHOOSE THIS UNIT ---

OEM specification tapered roller bearing ensures exact dimensional fitment and proper load capacity for MAN 7.5 ton front axle applications.

Manufactured from high carbon chromium bearing steel (GCr15 or equivalent) with precision heat treatment for optimal hardness and wear resistance, typically achieving 60 to 64 HRC on raceways and rollers.

Precision ground raceways and rollers ensure smooth rotation with minimal friction, reducing operating temperature and extending bearing life.

The tapered design supports both radial and axial loads simultaneously, which is critical for front wheel applications where cornering forces are significant.

This bearing is interchangeable with multiple OEM numbers: 3017, 33214X3, 06.32499.0043, FAG 528983B, SKF 331933, making it easy to cross reference for replacement.

Wide cross compatibility beyond Delong F2000, including Delong F3000, X3000, M3000, Sinotruk HOWO series, and Steyr series trucks, simplifies parts inventory management for mixed fleet operators.

--- TECHNICAL DETAILS ---

OEM Number: 81.93420.0074
Also Known As: 3017 / 33214X3 / 06.32499.0043
Bearing Type: Tapered roller bearing (single row)
Inner Diameter (d): 70 mm
Outer Diameter (D): 130 mm
Height (Width): 57 mm
Weight: Approximately 2.73 to 2.97 kg (2.73 to 2.97 kg)
Material: High carbon chromium bearing steel (GCr15 or equivalent)
Hardness: 60 to 64 HRC (raceways and rollers)
Accuracy Class: P0 (standard industrial grade, meets OEM requirements)
Cage Material: Steel cage (standard)
Operating Temperature Range: -40°C to +120°C
Lubrication: Grease lubrication required (packing not included)
Axle Application: MAN 7.5 ton front axle
Position: Front wheel hub, inner (inboard) position
Assembly: Used together with outer bearing 81.93420.0081 (32310)

--- PRODUCT PARAMETERS ---

Condition: New
Warranty: 12 months
Applicable Industries: Heavy duty truck fleet maintenance, auto repair shops, commercial vehicle parts wholesale, export trading
Video outgoing-inspection: Available upon request
Machinery Test Report: Available upon request
Marketing Type: Regular product (OEM grade)
Standard or Nonstandard: Standard (OEM specification)
Structure: Tapered roller bearing (single row)
Body Material: High carbon chromium bearing steel
Place of Origin: Shandong, China
Brand Name: OEM grade / SHACMAN compatible
Product Name: Front Wheel Inner Bearing
OE Number: 81.93420.0074
Color: Metallic (steel)
Quality: High-Quality (OEM grade)
Package: Neutral carton with plastic tube or oil paper wrapping; anti-rust coating applied
Delivery time: 7 to 15 working days after order confirmation
Payment terms: T/T, Western Union, PayPal
MOQ: 1 piece
Sample: Available (customer pays shipping)

--- MATERIAL COMPOSITION ---

Bearing Rings (Inner and Outer Raceways): High carbon chromium bearing steel (GCr15 / AISI 52100 equivalent), through hardened to 60 to 64 HRC
Rollers (Tapered): High carbon chromium bearing steel (GCr15 / AISI 52100 equivalent), precision ground, hardness 60 to 64 HRC
Cage: Steel cage (stamped or machined, as per OEM design)
Surface Finish: Precision ground on raceways and roller contact surfaces; outer and inner diameters ground to tight tolerances
Anti-rust Treatment: Light oil coating for corrosion protection during storage and transit

--- COMPATIBLE VEHICLE APPLICATIONS ---

Confirmed fitment (MAN 7.5T front axle):

SHACMAN Delong F2000 series (all variants: tractor, dump truck, concrete mixer, cargo truck) front wheel inner bearing position
SHACMAN Delong F3000 series (with MAN 7.5T front axle)
SHACMAN Delong X3000 series (with MAN 7.5T front axle)
SHACMAN Delong M3000 series (with MAN 7.5T front axle)
SHACMAN Delong X5000 series (with MAN 7.5T front axle)
SHACMAN Aolong (奥龙) series

Also compatible with:

Sinotruk HOWO series equipped with MAN technology front axle (verify VIN)
Steyr series with MAN 7.5T front axle
Other heavy trucks using MAN 7.5T front axle design

Always confirm compatibility by checking the original part number (81.93420.0074 / 3017 / 33214X3) and comparing with the old bearing before ordering. This bearing is the inner position bearing; the outer bearing (81.93420.0081 / 32310) is a separate part and not included.

--- INSTALLATION NOTES ---

Raise the front axle and support the vehicle securely on jack stands. Remove the front wheel.

Remove the axle spindle nut and washer. Pull off the wheel hub assembly. Be careful not to damage the spindle threads.

Remove the old inner bearing from the hub using a bearing puller or drift punch. Clean the hub cavity thoroughly, removing all old grease and debris.

Inspect the bearing race (cup) pressed into the hub. If the race is worn or pitted, it must be removed and replaced as a set with the new bearing cone. Note that the 81.93420.0074 is typically a complete tapered roller bearing assembly including both the cone (inner race with rollers) and the cup (outer race). Some aftermarket versions may supply cone and cup separately; confirm before installation.

Clean the spindle and inspect for scoring or damage. Apply clean wheel bearing grease to the spindle and inside the hub.

If the bearing is supplied as cone and cup separately, press the new cup into the hub using the correct drift. Ensure the cup is fully seated against the shoulder.

Apply wheel bearing grease to the new bearing cone, working grease between the rollers and cage. Place the new inner bearing into the hub cup.

Slide the hub assembly onto the spindle. Install the outer bearing, washer, and spindle nut.

Adjust bearing preload according to SHACMAN factory specification: typically tighten the spindle nut to approximately 50 Nm while rotating the hub, then back off 1/4 to 1/3 turn and lock in place. Final wheel end play should be 0.03 to 0.10 mm (0.001 to 0.004 inches).

Install a new spindle nut cotter pin or lock ring. Repack the hub cap with grease if required. Reinstall the wheel.

Torque wheel lug nuts to factory specification. Lower the vehicle. Test drive and recheck bearing temperature after the first 50 km.

Professional installation recommended. Wheel bearing adjustment is critical for safety and bearing life. Full torque and preload specifications available digitally upon request.

--- WHEN TO REPLACE ---

Replace the front wheel inner bearing if you observe any of the following conditions: grinding or growling noise from the front wheel during driving, vibration felt in the steering wheel or floor, excessive wheel play when the hub is lifted and rocked, visible pitting, spalling, or rust on the bearing rollers or raceways, overheating (bearing discolored blue or brown), rough rotation when the bearing is spun by hand, or during routine wheel end service (typically every 200,000 to 300,000 km depending on operating conditions).

When replacing the inner bearing, it is strongly recommended to replace both the inner and outer bearings (81.93420.0074 and 81.93420.0081) as a set, along with the wheel seal. Bearing races (cups) must be replaced as a set with the matching cone; do not mix old and new components.

--- PACKAGING AND DELIVERY ---

Packaging: Neutral carton with plastic tube or oil paper wrapping; anti-rust oil coating applied. Custom packaging available upon request.
MOQ: 1 piece
Delivery Time: Regular orders within 24 to 48 hours. Bulk orders (50 pieces or more) require 5 to 10 working days
Place of Origin: Shandong, China
Payment Terms: T/T, Western Union, PayPal
Shipping Terms: EXW, FOB Qingdao, CFR, CIF, DDU

--- CONTACT ---

Sales Manager: William
Phone / WeChat: +86 19050562894
Email: Sales22@chinatruck.cc
Company: Authorized commercial vehicle parts supplier

--- WARRANTY AND OFFERS ---

12 month warranty against manufacturing defects.
Free basic installation guidance (digital document) upon request.
Bulk order discounts available for 10 pieces or more.
Express shipping available for urgent replacement needs.
Free VIN based compatibility check before ordering.