This item for control the carriage after the carriage is released. 
Dimension : chain - 6" - used - 2 set 
 
Component: A carriage lock in a Mechanical Buffalo likely refers to a mechanism that secures or stabilizes a moving part (the “carriage”), such as:
The wheel assembly (including the front wheel hub, axle, or drive shaft connection) to prevent unwanted movement during operation or transport.
An implement mount (e.g., for a plow, tiller, or trailer) that locks the implement in place or adjusts its position.
The chain is likely a physical chain used to:
Secure the lock (e.g., a chain-and-padlock system to immobilize the wheel or implement).
Adjust the carriage position (e.g., a chain-driven tensioning or locking mechanism).
Prevent theft or unauthorized movement of the MB.
Relation to Front Wheel and Drive Shaft: The carriage lock may interact with the right-side front wheel (driven by the long-striped drive shaft) or its hub (where the bushing resides) to:
Lock the wheel to prevent rotation (e.g., during maintenance or parking).
Stabilize the axle or hub assembly during heavy agricultural tasks.
Secure the drive shaft’s connection to the wheel hub.
MB Context: In a Mechanical Buffalo, a two-wheeled tractor, such a lock could be part of the drivetrain or implement control system, ensuring safe operation or secure storage. The chain suggests a manual, robust locking method typical in agricultural machinery.
 
Possible Interpretations
Wheel/Axle Lock with Chain:
A device that locks the front wheel (right-side, driven by the long-striped drive shaft) to prevent rotation, using a chain looped through the wheel or hub and secured with a padlock.
Purpose: Prevents the MB from rolling during maintenance, storage, or transport, or acts as an anti-theft measure.
Example: A chain passed through the wheel spokes or hub, locked to the chassis or a fixed point.
 
Implement Carriage Lock:
A mechanism to lock or adjust the position of an implement (e.g., plow or tiller) mounted on a carriage (a frame or bracket). The chain could be used to set the implement’s height, angle, or secure it when not in use.
Purpose: Ensures the implement remains stable during operation or locked when detached.
Example: A chain-tensioned lock that holds the plow’s mounting bracket in place.
 
Gearbox or Drive Shaft Lock:
A lock that secures the drive shaft (long stripes, right side) or gearbox output to prevent power transmission to the wheel, using a chain to immobilize the shaft or a related component.
Purpose: Safety during maintenance or to disable the MB when parked.
Example: A chain wrapped around the drive shaft or gearbox output flange, secured to the chassis.
 
Key Details and Application
Mechanical Buffalo (MB): A two-wheeled tractor (e.g., Kubota, Siam Kubota, or Thai/Chinese variants) with a gearbox driving both wheels via drive shafts. The right-side drive shaft (long stripes) powers the right wheel, supported by a bushing in the hub.
 
Carriage Lock Specs:
Material: Likely steel for durability, with the chain being hardened steel (e.g., 8–10mm links) for security or load-bearing capacity.
Design: A bracket, bolt, or clamp that engages the wheel hub, axle, or implement mount, with a chain for locking or adjustment. May include a padlock or pin to secure the chain.
Installation: Bolted or clamped to the chassis, hub, or gearbox, with the chain looped through or around the target component (e.g., wheel or shaft).