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Sitrak VPD71D Steering Shaft Assembly (880,1679-225)

Sitrak VPD71D Steering Shaft Assembly (880,1679-225)
Sitrak VPD71D Steering Shaft Assembly (880,1679-225)
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What is the Sitrak VPD71D Steering Shaft Assembly (880,1679-225)

  • Sitrak VPD71D Steering Shaft Assembly (880,1679-225): Precision Engineering for Heavy-Duty Steering Control​
  • The Sitrak VPD71D Steering Shaft Assembly (880,1679-225) is a rugged, high-performance component designed to deliver exceptional steering precision, load-bearing capacity, and durability for commercial vehicles operating in the most demanding environments. Engineered with a robust suite of components, this assembly ensures seamless articulation, minimal play, and reliable operation, making it ideal for heavy trucks, buses, and industrial machinery.​
  • Structural Foundation and Core Components​
  • The Front Beam, constructed from high-strength alloy steel, forms the backbone of the assembly, providing a stable platform for mounting critical steering components. A laser-engraved Nameplate details model specifications and compliance standards, ensuring easy identification and maintenance tracking. Thrust tapered roller bearings are integrated to support axial and radial loads from steering forces, their heat-treated surfaces reducing friction and wear while enabling smooth rotation of the Main pin—a forged steel pivot that connects the steering knuckles to the front beam.​
  • Precision Alignment and Adjustment​
  • A Main pin limit screw fine-tunes the pin’s travel, preventing excessive movement and ensuring consistent steering response. Spring washers and Type I hexagon nuts secure the main pin assembly, with the washers providing constant tension to resist vibration-induced loosening. Adjustment spacers and Adjustment shims (multiple thicknesses available) allow for meticulous calibration of steering geometry, eliminating play and optimizing alignment for minimal tire wear and improved handling. These components work together to achieve precise camber and caster angles, critical for stability at high speeds or during sharp turns.​
  • Secure Fastening and Lubrication​
  • Hexagon head bolts M18*1.5 and M20*1.5 (grade 10.9, zinc-plated) fasten major components like the steering knuckles and tie rods, ensuring high-tensile strength and corrosion resistance. Hexagonal thin nuts and Spring washers complement the bolts, distributing clamping force evenly across flanges to prevent stress concentrations. A Grease nipple assembly (BM8*1 D71412 ZN) enables easy lubrication of moving parts with high-temperature Grease, reducing friction and extending component life—an essential feature for maintenance-heavy fleets.​
  • Sealing and Protection​
  • An O-ring 53×2.65-G-N-GB/T 3452.1-2005 creates a watertight seal at the main pin housing, preventing lubricant leakage and contaminant ingress. The Main pin cover and Main pin cover assembly, constructed from impact-resistant polymer, shield internal components from dust, mud, and road debris. A Protective sleeve on the steering cross-tie rod assembly (φ50) guards against abrasion, ensuring smooth motion and preventing premature wear of tie rod ends.​
  • Compatibility and Design Excellence​
  • The assembly integrates seamlessly with Steering knuckle assembly (left/right), Steering cross-tie arm (left), and Steering tie rod arm (right), forming a cohesive steering system that translates driver input to precise wheel movement. A Spacer ring and Elastic retaining ring for hole maintain alignment of the main pin and bearings, while Adjustment screws allow on-the-fly tweaks to steering responsiveness. The rugged design withstands repeated impacts from uneven terrain, with stress points reinforced through forge welding for enhanced durability.​
  • SEO-Optimized Features for Commercial Relevance​
  • Keyword Precision: Prioritizes model number (880,1679-225), component names (Thrust tapered roller bearings, Adjustment shims), and technical specs to dominate exact-match searches in parts databases and maintenance guides.​
  • Technical Depth: Details material science (alloy steel, heat-treated bearings) and functional benefits (vibration resistance, easy lubrication) to attract mechanical engineers and fleet managers.​
  • Application Focus: Emphasizes compatibility with heavy-duty trucks and harsh environments, addressing core needs for reliability, safety, and minimal downtime.​
  • In summary, the Sitrak VPD71D Steering Shaft Assembly (880,1679-225) sets a benchmark for heavy-duty steering performance, combining robust construction, precision adjustment, and advanced sealing technology. Trust in its engineered excellence to deliver stable, responsive handling mile after mile—backed by Sitrak’s commitment to innovation and durability in commercial vehicle components.

Product Parameters of Sitrak VPD71D Steering Shaft Assembly (880,1679-225)

AC40414171342 VPD71D Steering Shaft Assembly (880,1679-225)
Serial No.  Drawing No. Name Quantity
1 AZ4071415001 Front Beam 1
2 WG9719410028 Nameplate 1
3 WG4007410049 Thrust tapered roller bearings 2
4 WG4071415005 Main pin 2
5 WG9100411006 Main pin limit screw 2
6 Q40314 Spring washers 2
7 Q340B14T13F2 Type I hexagon nuts 2
8 WG4005415521 Adjustment spacer 1
9 WG4005415522 Adjustment Spacer 1
10 WG4005415621 Adjustment Spacer 1
11 WG4005415622 Adjustment Shims 1
12 WG4005415523 Adjustment shims 1
13 WG4005415623 Adjusting Shims 1
14 WG4005415524 Adjusting Shims 1
15 WG4005415624 Adjusting Shims 1
16 WG4005415629 Adjusting Shims 1
17 WG4005415630 Adjusting Shims 1
18 WG4005415631 Adjusting Shims 1
19 WG4005415632 Adjusting Shims 1
20 WG4005415633 Adjustment gasket 1
21 AZ9003963031 Grease nipple assembly (BM8*1 D71412 ZN) 2
22 Q43058 Elastic retaining ring for hole 2
23 WG4005415316 Main pin cover 2
24 WG4095415034 Spacer ring 2
25 AZ4071415013 Steering knuckle assembly (left) 1
26 AZ4071415024 Main pin cover assembly 2
27 Q40308 Spring washer 6
28 ZQ150B0816 Hexagon head bolt M8 6
29 AZ9003070034 O-ring 53×2.65-G-N-GB/T 3452.1-2005 4
30 ZQ151B1855TF2 Hexagon head bolts M18*1.5 12
31 Q351B14T15 Hexagonal thin nuts 2
32 WG4007411001 Adjustment screws 2
33 WG9100410060 Protective sleeve 2
34 WG4071415053 Steering cross-tie arm (left) 1
35 ZQ151B2080TF6 Hexagon head bolt M20*1.5 4
36 AZ4071415014 Steering knuckle assembly (right) 1
37 WG4071415054 Steering tie rod arm (right) 1
38 AZ9731430050 Steering cross-tie rod assembly (φ50) 1
39 190007380213 Grease 12
 

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