Rear Bucket Pin 44.5x350mm (fits JCB) - AM 911/12400
High-quality, hardened rear bucket pin (tipping link pin) by AM with dimensions of 44.5 x 350 mm. This component is dedicated to JCB construction machinery. Pins at this kinematic point of the arm operate under massive, variable loads and are directly exposed to continuous friction. The use of alloy steel with high abrasive wear resistance guarantees a long service life for the component, minimizes play in the quick coupler or bucket ears, and restores factory precision to attachment control.
Zonal Hardness 54-62 HRC: The pin undergoes specialized heat treatment. The surface working layer, hardened up to 62 HRC, exhibits extreme resistance to galling and abrasive wear caused by dust and sand. Conversely, the flexible, tough core of the pin effectively absorbs hydraulic impacts and vibrations, preventing the component from cracking during heavy work in rocky ground.
Technical Specification:
- Part type: Rear bucket / arm tipping pin.
- Quality class: High-quality aftermarket replacement
- Pin diameter: 44.5 mm.
- Total length: 350 mm.
- Induction hardening depth and hardness: 54 - 62 HRC (induction hardened).
- Manufacturer/Brand: AM.
- Part number: 911/12400 (91112400).
Compatibility with JCB Machinery:
| Machine Category | Series and Models |
|---|
| Backhoe Loaders |
Series: 3CX, 4CX, 5CX, 2CX, 2DX, 3DX, 4DX, 210/212, 214/215/217, 3/3C/3CS, 3D/3DS, 4/4C/4CN, 1400/1550/1700, 3CX Entry Level (Global) |
| Mini Excavators |
Series: 100C, 65R, 67C, 805X, 806X, 808X, 85Z, 86C, 90Z |
| Skidsteer Loaders |
Robot Series: Robot 1105, Robot 185 |
| Tracked Excavators |
800 Series: 811 (1986-1988), 812 (1986-1991), 814 (1986-1991) |
| Wheeled Excavators |
Hydradig 110W Series: Hydradig 110W Pothole Pro [STV], 110W Pothole Pro [T4F], 110W Pothole Pro [UN3], 110W [STV], 110W [T4F], 110W [T4i], 110W [UN3] |
Workshop Tip: The kinematic linkage system of the rear bucket in JCB excavators and backhoe loaders endures extremely harsh operating conditions – it is constantly showered with soil, mud, and quartz dust, which acts on metal like an abrasive paste.
Golden rules for pin replacement:
1. The Pair Rule (pin + bushing): Replacing only the pin when the bushings are heavily worn or "oval" is counterproductive. The new pin will quickly suffer localized overloading and wear out at an accelerated rate. Always inspect the condition of the mating bushings and replace them if necessary.
2. Installation Safety (do not strike with a steel hammer!): Steel hardened to a surface hardness of 62 HRC has a highly compact and hard crystalline structure. Striking directly onto the face of the pin with a heavy steel hammer can lead to a hard shard chipping off (posing a severe hazard to eyes and hands!) or cracking the case-hardened layer. Always use a brass drift, copper drift, or a soft dead-blow mallet to drive the pin in.
3. Initial Lubrication and Regular Maintenance: Before sliding the pin into place, generously coat it with lithium-calcium grease enriched with molybdenum disulfide (MoS2) or graphite grease. Do not forget to grease this point daily during intensive operations – grease not only reduces friction but also flushes out accumulated dirt and water.
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