This item inside the gearbox , joind gear change lever control at gearbox top cover.
Dimension: 18.5cm x 1.5 cm
Weight       :   20 gm
 
Component: A push rod in an MB gearbox is likely a clutch push rod, a rod that transfers force from the clutch pedal (or lever) to the clutch mechanism inside the gearbox. It disengages the clutch, allowing gear shifts or stopping power transmission to the drive shaft (right-side, long stripes) and front wheel.
Function: When the operator presses the clutch lever, the push rod moves to push the clutch release bearing (or similar mechanism), separating the clutch plate from the flywheel, disconnecting the engine (powered via the Bando A-57 V-belt) from the gearbox.
Location: Typically housed within the gearbox’s main shaft or clutch housing, extending from the clutch actuator (e.g., slave cylinder or lever) to the clutch assembly.
Alternative Interpretation: Less likely, the push rod could refer to a gear linkage push rod (e.g., for shifting gears), similar to systems in bike-engine cars or other machinery, where a rod connects the gear lever to the gearbox’s shift mechanism. However, MBs typically use direct lever or cable systems for shifting, making the clutch push rod more probable.
 
Relation to MB Components:
Right-Side Drive Shaft (Long Stripes): The gearbox, controlled by the clutch push rod, powers the drive shaft to the front wheel.
Front Wheel Bushing: A worn push rod or clutch issue could cause vibrations, stressing the bushing in the wheel hub.
Control Carriage Lock with Chain: Secures the MB during maintenance, such as adjusting or replacing the push rod.
Bando A-57 V-Belt: Transfers engine power to the gearbox, which the clutch push rod helps control.
Dumper for Fuel Tank: Ensures clean fuel for the engine, indirectly supporting smooth clutch and gearbox operation.
 
Application in Mechanical Buffalo
Mechanical Buffalo (MB): A two-wheeled tractor (e.g., Kubota, Siam Kubota, or Thai/Chinese variants) with a diesel or gasoline engine (8–12 HP) driving a multi-speed gearbox (e.g., 6 forward, 2 reverse). The clutch push rod is critical for engaging/disengaging the gearbox to control power to the wheels or implements.
 
Push Rod Specs:
Material: Typically hardened steel (e.g., silver steel or chrome-plated) to withstand pressure and wear.
Length: Varies by MB model, but typically 100–300 mm, depending on the gearbox and clutch design. For example, search results note clutch push rods of 342 mm for VW 5-speed gearboxes or 123.72 mm for Laverda motorcycles, suggesting MB push rods are model-specific.
Diameter: Often 6–8 mm to fit within the gearbox main shaft, with hardened ends to resist wear.
Components: May include a ball bearing (e.g., 6–8 mm diameter) at the clutch end to reduce friction, as seen in Laverda clutches.
 
Operation:
The operator presses the clutch lever, moving the push rod via a mechanical linkage or hydraulic slave cylinder.
The rod pushes the clutch release bearing, disengaging the clutch, allowing gear shifts or stopping wheel rotation (e.g., right-side wheel with bushing).
Releasing the clutch re-engages the gearbox, resuming power transmission via the V-belt and drive shaft.