Swing Cylinder Bushing 64.5x75x36mm (fits JCB) - AM 809/00137
High-quality, hardened swing cylinder bushing (slew cylinder arm bushing) by AM with dimensions of 64.5 x 75 x 36 mm. This component is dedicated to JCB backhoe loaders. The rear arm swing system is one of the most heavily exploited parts of the machine, subjected to continuous, dynamic radial and impact loads. The use of wear-resistant alloy steel eliminates lateral play of the kingpost, prevents ovalization of the cylinder housings, and restores full control precision to the rear attachment.
Zonal Hardness 54-62 HRC: The bushing undergoes a rigorous heat treatment process. The outer and inner working layers, with a hardness of up to 62 HRC, guarantee extreme resistance to frictional wear and abrasion caused by soil, sand, and dust particles. The flexible core of the component effectively absorbs hydraulic impacts generated during sudden stops of the arm swing movement, protecting the bushing from cracking.
Technical Specification:
- Part type: Swing / slew cylinder eye bushing.
- Quality class: High-quality aftermarket replacement compliant with strict JCB OEM standards.
- Inner diameter: 64.5 mm.
- Outer diameter: 75 mm.
- Bushing width / height: 36 mm.
- Surface hardness: 54 - 62 HRC.
- Manufacturer/Brand: AM.
- Part number: 809/00137 (80900137).
Compatibility with JCB Backhoe Loaders:
| Machine Category | Series and Models |
|---|
| Backhoe Loaders |
Series: 3CX, 4CX, 5CX, 3DX, 210/212, 214/215/217, 3/3C/3CS, 4/4C/4CN |
Workshop Tip: Ignoring play in the swing cylinders is a straight path to a serious breakdown. The play causes the cylinder to perform micro-bending movements instead of working smoothly along its axis. This results in the rapid destruction of the seal packs in the cylinder gland, oil leaks, and in extreme cases, can lead to bending or cracking of the piston rod.
Golden rules for swing cylinder bushing installation:
1. Always verify the pin: Installing a new AM bushing onto an old, worn pin (with a nominal diameter of 64.5 mm) that already has scratches or necking is counterproductive. Uneven pressure will cause the new bushing to wear out at an accelerated rate.
2. Pressing without direct impact: Steel hardened to 62 HRC has a very hard surface layer that can chip (danger of injury!) or micro-crack under a direct strike from a steel hammer. The bushing should be pressed in using a screw puller/hydraulic press or by utilizing a soft metal drift (brass, copper). Pre-freezing the bushing to induce thermal contraction also works perfectly.
3. Proper initial lubrication: Before assembling the pin, generously fill the internal lubrication grooves with high-quality lithium-calcium grease enriched with molybdenum disulfide (MoS2) or graphite grease. Regular pressurized lubrication of the swing system effectively flushes out water and contaminants, drastically extending the trouble-free operating time.
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