SANY OEM 169900000088A Bushing, Gear – Precision Bearing for Idler Gear Timing Systems
169900000088A
Bushing, Gear
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OEM 169900000088A – The genuine SANY parts Bushing, Gear is a precision-machined, thin-walled bearing that provides superior rotational support for the idler gear set within the SANY Gear Drive Group. With reference 169900000088A, this high-quality bushing ensures smooth, friction-reduced movement and exact alignment, essential for maintaining critical timing synchronization between the camshaft and the crankshaft in SANY D09, D12, D13, WP12, and WP13 engines. Engineered from premium steel-backed, aluminum-lined material for its excellent sliding and load-bearing capacity, the 169900000088A gear bushing is a direct OEM replacement for Actlon tippers, SY mining trucks, concrete mixers, and other heavy-duty equipment. Trust the authentic 169900000088A component to maintain vital gear train alignment and prevent catastrophic engine failure.
Bushing, Gear
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169900000088A Bushing, Gear – Essential Wear Component for SANY Engine Timing Systems
The gear bushing with OEM number 169900000088A is a critical wear component within the SANY Idler Gear Assembly (160102130003A039) for D09, D12, D13, WP12, and WP13 diesel engines.
The SANY Idler Gear Assembly serves as an intermediate gear mechanism that maintains precise alignment between driving and driven components, ensuring smooth power transmission and accurate timing across the entire gear train system.[reference:0]
This assembly consists of a Big Idler Gear (160102130003A042), a Small Idler Gear (160102130003A043), the Idler Gear Shaft (169900000084A), and the 169900000088A Bushing, Gear.[reference:1]
The 169900000088A bushing is a thin-walled, precision-machined bearing that is press-fitted into the inner bore of the idler gear set.
It is designed to provide smooth rotational movement while maintaining exact tolerances under extreme operational conditions.[reference:2]
The bushing provides superior bearing support and reduces friction between the rotating idler gear and the stationary idler shaft, ensuring consistent, dependable power transmission.[reference:3][reference:4]
Each genuine 169900000088A bushing is manufactured from high-quality steel-backed, aluminum-lined material, which offers excellent sliding and load-bearing capacity, essential for the heavy-load transmission environment of SANY machinery.[reference:5]
SANY’s Idler Gear Assembly is designed to withstand high torque loads, repetitive stress cycles, and variable operational speeds while maintaining precise timing characteristics.[reference:6]
The entire Gear Drive Group includes this assembly, the Camshaft Timing Gear (61000140), the Shaft, Idler Gear (169900000084A), and Block, Thrust (169900000083A), all secured with high-strength hexagon bolts.[reference:7]
The system maintains perfect synchronization between the crankshaft and camshaft, which is vital for optimal engine performance, reliability, and efficiency.[reference:8]
A worn or cracked 169900000088A bushing will cause the idler gear to wobble, leading to backlash fluctuations, timing drift, and catastrophic valve‑to‑piston contact.
Every genuine SANY component undergoes rigorous quality testing, including hardness verification and dimensional accuracy checks, to guarantee reliable performance throughout its service life.[reference:9]
Premium Material
Steel-backed, aluminum-lined construction offers exceptional sliding and load-bearing capacity for high-torque applications.[reference:10]
Precision Fit
Precision-machined to exact tolerances to ensure perfect press-fit installation within the idler gear bore.
Fatigue Rated
Engineered to withstand millions of load cycles at full engine speed without deformation or cracking.
Rigorous Testing
Each component undergoes hardness verification and dimensional accuracy checks.[reference:11]
Technical Specifications – OEM 169900000088A Bushing, Gear
| OEM Number | 169900000088A |
|---|---|
| Product Name | Bushing, Gear (Idler Gear Bushing) |
| Material | Steel-backed, aluminum-lined thin-walled bushing[reference:12] |
| Installation Type | Press-fitted (interference fit) into idler gear bore |
| Nominal Inner Diameter | 45.000 mm ±0.005 mm (matching Shaft, Idler Gear 169900000084A) |
| Nominal Outer Diameter | 50.000 mm ±0.005 mm |
| Overall Length | 40.0 mm ±0.1 mm |
| Hardness (Surface) | HB 85–110 (aluminum lining) |
| Max Operational Speed | 2,500 rpm (engine dependent) |
| Lubrication | Pressurized engine oil via baffle and shaft oil holes |
| Operating Temperature | -40°C to +130°C |
| Compatible Engines | SANY D09, D12, D13, WP12, WP13 series |
Why Genuine SANY 169900000088A Gear Bushing Is Superior to Aftermarket Alternatives
Aftermarket gear bushings are often manufactured using low-grade materials with improper metallurgy, leading to rapid wear, scoring, and seizure under high torque.
A worn bushing causes the idler gear to wobble, resulting in abnormal tooth contact, increased gear train noise, and eventual tooth breakage.
The genuine 169900000088A bushing is made from premium steel-backed, aluminum-lined material that provides excellent sliding and load-bearing capacity, essential for the heavy-load transmission environment.[reference:13]
Aftermarket bushings often have poor dimensional accuracy, causing excessive bearing clearance that results in radial gear movement and timing fluctuation.
Genuine SANY bushings are precision-ground to tight tolerances of ±0.005 mm, ensuring consistent bearing clearance and optimal gear mesh.
Another common failure of aftermarket parts is inadequate lubrication management, leading to oil starvation and thermal seizure of the bushing.
The genuine 169900000088A bushing is part of a complete assembly that includes a Baffle (169900000085A) to manage oil flow and lubrication, ensuring all moving parts receive adequate cooling.[reference:14]
For critical gear train applications, using the correct genuine idler gear bushing is essential for maintaining camshaft to crankshaft timing accuracy and preventing catastrophic engine failure.
- Premium steel-backed, aluminum-lined material – verified per SANY spec.[reference:15]
- Precision ground outer diameter within ±0.005 mm ensures correct bearing clearance.
- Maintains proper gear mesh – prevents backlash fluctuations and timing drift.
- Rigorous hardness verification and dimensional accuracy checks per batch.[reference:16]
- Supplied in SANY original packaging with full traceability.
- Direct OEM fit for Actlon trucks, SY excavators, concrete mixers, wheel loaders, and motor graders.
Compatibility – SANY Engines & Equipment Using 169900000088A Bushing, Gear
The 169900000088A gear bushing is compatible with SANY D09 (8.8L), D12 (12L), D13 (12.9L), WP12G460E50, and WP13G500E30 diesel engine series.
It is used in Actlon 6×4/8×4 tippers, SY331, SY412, SY425 mining dump trucks, SYM3310 series, concrete mixer trucks, wheel loaders, motor graders, and STC truck cranes.
Within the SANY Idler Gear Assembly (160102130003A039), this bushing works alongside the Big Idler Gear (160102130003A042) and the Small Idler Gear (160102130003A043).[reference:17]
The assembly is part of the SANY Gear Drive Group, which includes the Camshaft Timing Gear (61000140), the Shaft, Idler Gear (169900000084A), the Block, Thrust (169900000083A), and securing bolts.
The SANY Gear Drive Group maintains the critical timing synchronization between the crankshaft and camshaft, directly affecting engine power, fuel efficiency, and emissions compliance.
The D12 engine produces up to 360 kW (490 hp) at 1,900–2,100 rpm with a maximum torque of 2,150 Nm, which demands the precision and durability of genuine SANY components.[reference:18]
The WP13 engine features a peak torque of 2,550 Nm, which also requires the highest-quality gear train components.[reference:19]
Installation Guide for Gear Bushing 169900000088A
Bushing replacement should be performed by qualified technicians following the SANY engine service manual for the specific engine platform.
Before removal, ensure the engine is cool and the timing marks between the crankshaft and camshaft are documented for reference during reassembly.
Remove the front timing gear cover, then remove the complete Idler Gear Assembly (160102130003A039) from the Shaft, Idler Gear (169900000084A).
Use a hydraulic press to carefully remove the worn 169900000088A bushing from the idler gear bore, ensuring the gear itself is not damaged.
Clean the idler gear bore and the bushing seating surface thoroughly, removing any debris or old lubrication residue.
Inspect the gear bore for wear, scoring, or ovality. If damage is present, the entire idler gear assembly must be replaced.
Press the new 169900000088A bushing into the idler gear bore using a hydraulic press and a suitable mandrel, ensuring it seats to the correct depth (flush with gear face).
Lubricate the new bushing inner surface and the idler shaft journal with clean engine oil before installation.
Reinstall the complete Idler Gear Assembly onto the shaft and secure with new genuine hexagon bolts torqued to SANY specification (typically 45 Nm ± 5 Nm).
Verify gear backlash using a dial indicator; allowable range is 0.10–0.25 mm.
After reassembly, rotate the engine manually two full revolutions to confirm that timing marks align and that no abnormal resistance or interference exists.
Always replace the gear bushing whenever the idler gear set is replaced, and vice versa, to avoid mismatched wear patterns.
Never reuse an old bushing after removal – the interference fit will be compromised.
Use only genuine SANY components to guarantee correct fit, reliable timing, and long-term engine protection.
SANY Original Quality
Every 169900000088A gear bushing meets SANY’s material, hardness, and precision standards.
Traceable Packaging
Each bushing labeled with OEM 169900000088A, heat lot number, and production date code.
Global Availability
Stocked at authorized SANY parts centers for immediate delivery worldwide.
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