The pressure limiting valve serves to reduce the air pressure in the brake chambers of the front axle during low-intensity braking, which improves stability and controllability (especially on slippery roads), as well as to quickly release air from the brake chambers when releasing the brakes
The oil pump (Fig. 1) is two-section, gear type, has a drive gear ratio of 1.075 from the crankshaft nose gear, attached to the lower plane of the crankcase
The piston serves to sense gas pressure and transmit it through the piston pin to the connecting rod and crank of the crankshaft