Introduction

In international logistics, mining operations, and heavy transport, Sinotruk HOWO (A7, 371, TX, and Sitrak series) trucks serve as the core workforce for global commercial fleets. However, for procurement managers, distributors, and repair workshops, the primary challenge is not just sourcing spare parts, but ensuring absolute fitment accuracy and OEM-level durability.

A minor variation in engine generation or axle model (e.g., HC16 vs. MCY13) can lead to mismatched part numbers, resulting in costly shipping delays and fleet downtime.

Key Sourcing Challenge: Components like starters, clutch boosters, and cylinder head gaskets often look identical on the outside but feature different teeth counts, mounting positions, or oil passage configurations.

As a dedicated supply chain partner, William Du | Heavy Truck Aftermarket Fitment & Supply Chain Specialist provides verified OEM cross-referencing, pre-shipment inspections, and consolidated export solutions to guarantee 100% compatibility.

Complete Sinotruk Spare Parts Classification

To streamline your procurement workflow, we have categorized our comprehensive Sinotruk stock list into key operational systems.

1. Engine & Cooling System Components (WD615 / D10 / D12 / MC Series)

Engine parts require ultra-precise dimensions, especially regarding bearing clearances and cooling flow specs.

High-Frequency Engine Replacement Parts

Description	Original P/N	Fitment & Technical Notes
Piston Pin	VG1560030013	High-strength alloy steel for WD615/D10/D12 series
Thrust Plate	VG1246010126 / VG1034010176	Main crankshaft position control
Main Bearing Shell	VG1246010034/35 / VG1500010046	High load-bearing fatigue resistance
Connecting Rod Bushing	VG1500030077	Wear-resistant phosphor bronze
Water Pump Assembly	VG1500060051 / VG1062060351	Standard & TX Series specific options
Cylinder Head Gasket	VG1500040065	New Version: Features 1 extra oil passage
Starter Motor 371HP	VG1560090001 / VG1560090007	Standard / 11-Teeth Heavy-Duty
Turbocharger Assembly	VG1095118233 / VG1034110341	Tailored for HOWO 371 & SITRAK TX

2. Transmission & Clutch Assemblies (HW & Fast Gearboxes)

Clutch and transmission components endure massive dynamic torque. Matching the correct booster and fork bracket prevents premature wear.

Description	Original P/N	Application / System
Clutch Master Cylinder	WG9719230023	Hydraulic control system
Clutch Servo / Booster	DZ9112230178 / DZ93189230080	Air-assisted hydraulic operation
Clutch Pressure Plate	AZ9921160200 / DZ9114160026	HOWO & Shacman compatible models
Input Shaft Cover & Oil Ring	AZ2203020108	HW Transmission front seal unit
Shift Fork Shaft Bracket	WG2229260001	Gear shifting mechanism

3. Drive Axle & Differential Systems (HC16 / ST16 / MCY Series)

Axle components—such as inter-axle differentials, input flanges, and wheel hub oil seals—must be verified by exact dimensions and gear tooth counts.

Differential & Drive Shaft Breakdown

• Inter-Bridge Input Flange (WG9231320014): Dimensions 180*4*46*85*90
• Through-Shaft Flange – T7 (KLF9231320261): Dimensions 165*4*46*85*66
• Through Shaft Assembly (AZ9231320261 / WG7129320647-1): Diameter 14mm specification
• Inter-Axle Differential Assembly (AZ9231320271): HC16 central axle configuration
• Rear Axle Differential Shell (WG9981320273): Heavy-duty cast iron construction
• Bevel Gear Set (29/21) (AZ9981320152): HC16 ratio matching

                       ┌──> Inter-Axle Differential (AZ9231320271)
[Through Shaft Input] ─┼──> Bevel Gear Set 29/21 (AZ9981320152)
                       └──> Wheel Hub & Bearings (33115 / 573)

4. Cabin, Body & Electrical Components (WG1642 / WG9525)

Exterior and cabin hardware are the most frequently requested replacement parts due to operational wear and road conditions.

Cabin & Electrical Fast-Movers List

• Headlamp Assembly (L/R): WG9525720025 / WG9525720026
• Rear Tail Light (L/R): WG9719810001 / WG9719810002
• Cabin Hydraulic Lift Pump: WG9719820001 / WG9925823011 (TX RHD)
• Windshield Glass: AZ1642710001
• Wiper Motor & Arm: WG1642741008 / WG1642740012
• Combination Switch: WG9730583117
• Cabin Air Spring (Front Mask): WG1642110024

5. Steering, Suspension & Braking Systems

Heavy load conditions across African and Middle Eastern terrains demand high-fatigue suspension and braking components.

• Front/Rear Brake Drums: AZ9112440001 / WG9231342006
• Brake Shoes & Lining (14-Hole): WG9231342069
• Steering Gearbox (ZF8098): WG9725478118
• V-Push Rod 371HP: AZ9725529272
• Front Leaf Spring Assembly: WG9725520072 (Individual main/secondary leaves available)
• Rear Leaf U-Bolts & Nuts: AZ9925520268 / AZ9125520268

Technical Verification & Risk Elimination Workflow

Relying purely on component names causes high mismatch rates. At Qingdao Kailai, we implement a strict 4-step fitment verification protocol before dispatching any order:

[Client Inquiry / Checklist] 
       │
       ▼
[Step 1: Check OEM Part Numbers vs. Chassis VIN]
       │
       ▼
[Step 2: Verify Dimensions & Tooth Counts (e.g. 11-tooth starter, 14-hole brake shoe)]
       │
       ▼
[Step 3: Physical Sample / Drawing Inspection]
       │
       ▼
[Step 4: Export-Grade Wooden Box & Container Packing]

Critical Fitment Tips for Procurement Managers

1. Starters (VG1560090001 vs VG1560090007): Verify flywheel ring gear tooth count (Standard vs 11-teeth).
2. Water Radiators (WG9719530270): Distinguish between standard and early-style thick core versions.
3. Oil Seals (WG9981340113): Ensure exact inner/outer diameter dimensions (e.g., 190*220*30).

Why Choose Qingdao Kailai Auto Sales as Your Supply Chain Partner?

• Comprehensive Inventory: Direct access to over 10,000+ OEM Sinotruk, Shacman, and FAW part numbers.
• OEM & Aftermarket Options: Choice of original Sinotruk factory parts or high-cost-performance certified aftermarket brands.
• Export Packing Excellence: Anti-rust oil treatment, reinforced wooden crates, and optimized mixed-container space loading.
• Technical Expertise: Led by dedicated specialists with deep regional experience in Africa, Central Asia, and the Middle East.

Frequently Asked Questions (FAQ)

Q1: How can I confirm if these parts fit my specific truck model?

A: Simply send us your 17-digit Chassis Number (VIN) along with your target part list. We will cross-reference it directly through the official Sinotruk EPC (Electronic Parts Catalog).

Q2: Do you support mixed container loading for small repair shop orders?

A: Yes! We specialize in LCL (Less than Container Load) and consolidated FCL shipments, combining engine, chassis, and cabin parts in a single, safe container.

Conclusion & RFQ

Sourcing Sinotruk HOWO and TX spare parts does not have to involve trial and error. With precise OEM cross-referencing, pre-shipment checks, and dedicated supply chain management, you can keep your fleet operating with zero unnecessary downtime.

Need a fast quote on the parts list above?

Send your inquiry or chassis number today to get verified fitment and competitive export pricing!

William Du | Heavy Truck Aftermarket Fitment & Supply Chain Specialist

Qingdao Kailai Auto Sales Co., Ltd.