Transmission combination switch 417-43-26211 (4174326211) is a spare part for WA380-3 loaders.

Gearbox Combination Switch 417-43-26211 (4174326211) is a spare part for WA380-3 loaders.

The gearbox combination switch is a core control component of the bulldozer's transmission system. It adjusts speed and traction by switching gears mechanically or electronically. Gear switching: Controls forward/reverse and fast/slow speed modes (e.g., star connection switching) via sliding contacts or solenoid valves. It is linked to the braking system to prevent misoperation (e.g., preventing runaway when starting on a slope). It converts mechanical motion into electrical signals for processing by the control module (e.g., TCM).

Function of the Bulldozer Balance Beam/Stable Bar

The balance beam (stable bar) is a key component of the bulldozer's suspension system. Its main functions are:

Load Balancing: Through triangular track arrangement and elastic suspension, it disperses ground impacts, increasing the transmission system's lifespan by 30%.

Driving Stability: The floating sub-suspension absorbs 50% of the impact load, increases the track contact area by 15%, and improves traction.

The balance beam optimizes chassis stability and reduces transmission load. The combination switch automatically adjusts the gear according to road conditions (such as soft ground) to match the suspension status of the balance beam.