Product Description

AZ9925520310 Balance Shaft Assembly is a critical chassis support part installed in heavy truck rear suspension and bogie systems. It helps distribute axle load between tandem axles, supports suspension articulation, and maintains vehicle stability under overloaded or uneven-road conditions.

Worn shaft sleeves, bushing damage, or shaft body deformation may lead to abnormal suspension movement, rear axle deviation, uneven tire wear, and reduced chassis stability.

This assembly is widely used in export fleet maintenance, engineering vehicle suspension repair, and heavy truck aftermarket overhaul.

Product Overview

This balance shaft assembly is commonly used in SINOTRUK HOWO 08 series heavy trucks and can also be applied in T7H, T5G, and SITRAK chassis platforms depending on suspension structure and bracket size. It supports dump trucks, tractor trucks, cargo trucks, and engineering transport vehicles.

Technical Parameters

Fitment Models

• SINOTRUK HOWO 08 Model 6x4 Dump Truck

• HOWO T7H Tractor Truck

• HOWO T5G Cargo Truck

• SITRAK C7H

• SITRAK G7

Fitment Verification

Please verify before purchase:

• VIN

• OEM No

• Shaft diameter

• Shaft length

• Bushing size

• Suspension bracket width

• Left / Right chassis setup

• Axle center distance

• Mounting hole position

• Serial plate

OEM Cross Verification (Only SINOTRUK / SHACMAN / FAW / Weichai)

Direct Fit

• SINOTRUK HOWO 08 model rear bogie chassis

• HOWO classic tandem axle suspension systems

Can Be Adapted

• HOWO T7H with bracket structure confirmation

• HOWO T5G with shaft diameter matching

• SITRAK C7H / G7 with suspension frame verification

• SHACMAN F3000 depending on bushing width

Similar But Not Compatible

• Different rear axle torque rod shafts

• Different equalizer beam shaft assemblies

• Non-matching bogie bracket size models

Common Field Failure Case

Case 1

Vehicle: HOWO 08 Model Dump Truck
Mileage: 620,000 KM
Problem: Rear suspension abnormal swing and axle offset
Root Cause: Balance shaft bushing wear and shaft scoring
Solution: Replaced AZ9925520310 complete assembly
Loss / Benefit: Reduced tire wear and restored axle alignment

Case 2

Vehicle: HOWO T7H Tractor Truck
Mileage: 510,000 KM
Problem: Rear chassis vibration under heavy load
Root Cause: Shaft sleeve clearance exceeded tolerance
Solution: Replaced shaft and bushings
Loss / Benefit: Reduced suspension instability and avoided axle bracket damage

Case 3

Vehicle: SITRAK C7H
Mileage: 700,000 KM
Problem: Uneven tandem axle load distribution
Root Cause: Shaft deformation caused poor suspension articulation
Solution: Installed new AZ9925520310 assembly after dimension verification
Loss / Benefit: Improved fleet uptime and prevented repeat suspension overhaul

Wrong Part & Export Transport Risk Control

Supplier Stability & Procurement Value

Stable supply of AZ9925520310 helps:

• Reduce wrong-part delivery risk

• Lower suspension downtime

• Reduce repeat repair frequency

• Improve axle stability

• Lower repeated sea freight cost

• Improve fleet uptime

• Support stable batch procurement

• Ensure consistent export lead time

Related Truck Parts

Directly Associated Parts

• AZ9925520311 Balance Shaft Bushing

• AZ9925520312 Shaft Sleeve

• AZ9925520313 Retainer Plate

Same System Parts

• WG9725520286 Leaf Spring Assembly

• AZ9725529272 Torque Rod

• WG9925520360 Rear Suspension Bracket

Frequently Ordered Together

• WG9100520065 U-Bolt

• AZ9725520260 Spring Pin

• WG9000520078 Suspension Washer

Often Forgotten Parts

• Grease nipple

• Shaft lock plate

• Bushing spacer

• Mounting bolts

Contact

William Du
Heavy Truck Spare Parts Supply
SINOTRUK | SHACMAN | FAW | Weichai Export Parts
WhatsApp / WeChat: +86 19050562894
Email: Sales22@chinatruck.cc