Middle Rocker Arm Shaft Seat
Опора Вала Коромысел
Asiento del Eje de Balancines
OEM Middle Rocker Arm Shaft Seat 611600050058 precision‑machined for the Shacman X5000 diesel engine. This intermediate 611600050058 support pedestal locates the rocker arm shaft between the cylinder head and the valve actuation mechanism.
Manufactured from high‑strength alloy steel with a hardened bearing surface, the Middle Rocker Arm Shaft Seat 611600050058 provides rigid support that maintains precise rocker arm geometry throughout the engine’s operating range.
Replacing a worn or cracked shaft seat with the genuine 611600050058 component restores proper valve lash consistency and prevents the uneven valve train wear that leads to power loss.
| Parameter | Specification |
|---|---|
| OEM Part Number | 611600050058 |
| Product Name | Middle Rocker Arm Shaft Seat |
| Brand / Model | Shacman X5000 |
| Material | Alloy Steel 40Cr, Induction Hardened |
| Shaft Bore Diameter | 22.00 mm (H7 tolerance) |
| Mounting Bolt Hole Spacing | 78.00 mm |
| Overall Height | 48.00 mm |
| Surface Hardness | HRC 52‑58 on bearing surface |
| Lubrication Feature | Internal oil feed hole aligned with shaft gallery |
| Application | Shacman X5000 rocker arm shaft intermediate support |
The 611600050058 middle rocker arm shaft seat is one of several support pedestals that hold the rocker arm shaft above the cylinder head. It provides a rigid bearing point between the front and rear shaft supports on the Shacman X5000 engine.
Without properly functioning intermediate supports, the rocker shaft can flex under the alternating loads of opening intake and exhaust valves. This flex causes inconsistent valve lift and accelerates wear on rocker arm bushings.
The Middle Rocker Arm Shaft Seat 611600050058 also contains a precision‑drilled oil passage that delivers pressurized lubricant from the cylinder head into the hollow rocker shaft for distribution to each rocker arm bearing.
The 611600050058 seat is machined from 40Cr alloy steel and undergoes localized induction hardening on the shaft contact surface. This creates a wear‑resistant layer while maintaining a tough, ductile core.
The hardened surface resists the fretting and galling that can occur between the steel shaft and the support bore under the high‑frequency oscillating motion characteristic of rocker arm operation.
Installing the 611600050058 shaft seat requires precise alignment of its oil feed hole with the corresponding passage in the cylinder head. Misalignment starves the rocker shaft of oil and causes rapid valve train failure.
The mounting bolts must be tightened to the specified torque in the sequence outlined in the Shacman service manual. Uneven torque can tilt the seat and bind the rocker shaft within its bearing bore.
Every 611600050058 seat is inspected on a coordinate measuring machine to verify bore diameter, bolt hole position, and oil passage alignment. The shaft bore is held to H7 tolerance for a precise sliding fit.
Hardness testing is performed on the bearing surface of each production batch. The induction hardening pattern is verified by sectioning sample parts and examining the case depth under a microscope.
A worn 611600050058 seat bore allows the rocker shaft to oscillate within the support, producing a rhythmic ticking noise that changes with engine speed. This noise is often louder when the engine is cold.
Reduced oil flow to the rocker arms, evidenced by dry or discolored rocker arm bushings during inspection, may indicate that the oil passage in the Middle Rocker Arm Shaft Seat 611600050058 has become restricted or misaligned.
During engine overhaul, all shaft seats should be carefully inspected for cracks, particularly around the bolt holes and the base flange. Any damaged seat must be replaced to ensure reliable valve train operation.
The 611600050058 seat is specifically designed for the intermediate positions on the Shacman X5000 rocker arm shaft. It is not interchangeable with front or rear supports that have different oil feed configurations.
A complete set of shaft seats should be replaced during major engine overhauls. Mixing new 611600050058 seats with worn original units can result in uneven shaft support and premature bushing wear.
Aftermarket shaft seats may use incorrect material or lack the precise oil passage geometry of genuine components. We supply only the authentic Shacman X5000 Middle Rocker Arm Shaft Seat 611600050058.
Each seat is individually packaged with corrosion‑inhibiting protection and clearly labeled with the part number 611600050058 for immediate identification during engine assembly operations.
Our international distribution network ensures that genuine 611600050058 shaft seats are available for prompt delivery to engine rebuilders and fleet maintenance facilities worldwide.
Single middle rocker arm shaft seat with protective oil coating. Position‑specific marking ensures correct installation location.
Expert guidance on shaft seat installation and oil passage alignment. We support proper fitting of your 611600050058 components.
For current stock availability and technical specifications on the genuine Middle Rocker Arm Shaft Seat 611600050058, please use the contact buttons above.
