BOOM Arm Bushing 60x70x62mm (fits JCB) - AM 809/00131
High-quality, hardened main boom / arm bushing (boom arm bushing) by AM with dimensions of 60 x 70 x 62 mm. This component is designed specifically for JCB construction, agricultural, and material handling machinery. The main boom articulation joint is one of the most heavily loaded structural points on the machine, constantly transferring the entire weight of the attachment and ground cutting forces. The use of high-grade alloy steel guarantees maximum friction resistance, eliminates pin play, and restores full stability and precision to the arm operation.
Zonal Hardness 54-62 HRC: The bushing undergoes an advanced heat treatment process. The surface working layer, with a hardness of up to 62 HRC, provides exceptional protection against wear, galling, and ovalization under harsh operational conditions (dust, sand, mud). At the same time, the bushing core retains optimal flexibility and toughness, effectively absorbing mechanical shocks and preventing component cracking under heavy pressure.
Technical Specification:
- Part type: Main boom arm / boom bushing.
- Quality class: Premium
- Inner diameter: 60 mm.
- Outer diameter: 70 mm.
- Bushing width / height: 62 mm.
- Surface hardness: 54 - 62 HRC (induction hardened).
- Manufacturer/Brand: AM.
- Part number: 809/00131 (80900131).
Compatibility with JCB Machinery:
| Machine Category | Series and Models |
|---|
| Backhoe Loaders |
Series: 3CX, 4CX, 5CX, 210/212, 214/215/217, 3/3C/3CS, 3DX, 4/4C/4CN |
| Telescopic Wheel Loaders |
TM 200 Series: TM200 [T0], TM200 (1997 - 2004 models), TM200FM (1997 - 2004 models) |
| Wheeled Loaders |
Series: 407, 408, 409, 410, 411 |
Workshop Tip: The pin connection of the main boom supports the entire weight of the attachments. The presence of play in this area causes the arm to sag, drastically reduces bucket control precision, and triggers severe metal-on-metal impacts, directly damaging the arm's weld structures and cylinder seals.
Golden rules for proper replacement:
1. Pin inspection: Always thoroughly verify the condition of the mating pin (Ø 60 mm). Installing a new AM bushing onto a worn, scratched, or unevenly worn pin will cause the new component to suffer accelerated wear and fail within a very short time.
2. Safe seating in the housing: Induction-hardened steel (up to 62 HRC) has a very dense surface structure. Striking it directly with a steel hammer risks cracking the coating or chipping off a fragment. The bushing should be pressed in using a hydraulic press (screw puller) or by utilizing brass/copper drifts. Prior to installation, it is helpful to cool the bushing in dry ice or a freezer (inducing thermal contraction), which facilitates its smooth entry.
3. Initial and periodic lubrication: Before seating the pin, clean the internal lubrication grooves of the bushing and fill them generously with fresh grease (lithium-calcium grease enriched with molybdenum disulfide - MoS2 is recommended). Regular pressurized lubrication creates a protective layer that repels water, flushes out quartz particles, and prevents system seizures.
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