Serial Transmissions with Helical Gears in Auxiliary Case
truck gearbox

Structure Characteristics:
Both main and auxiliary cases equipped with twin countershafts, power well distributed, large load capacity and high reliability.
The main shaft and gears are floating; there are no needle bearings between shaft and gears, high efficiency in power transfer.
With thin-and-fine teeth gear design in main case (contact ratioε>2), helical gears in auxiliary case, stable engagement, low noise and big loading ratio.
Equipped with lock-pin synchronizer in auxiliary case, non-metallic friction material adopted on friction taper surfaces, and high reliability.
Large speed ratio range, applicable in different road conditions, and strong climbing ability.
Combined design of main case and auxiliary case, small ratio steps and good fuel efficiency.
There are many types of power taking off, catering to various power output demands of refitted trucks.
Single H, single lever and double-lever operating mechanism can be realized.

Applicable Vehicles:

This series of transmissions are applicable for carrying trucks, dumpers, cross-country vehicles, cranes, heavy-duty fire engines and railway trucks, of which, the rated input torque is 1490Nm