car ZIL-131

The B10 fuel pump is a diaphragm, sealed, with three outlet and three inlet valves and a lever for manual fuel pumping
Symptom - Remedy
The generator does not provide charging current
Malfunction in the circuit generator - relay-regulator - battery or in the ground circuit - Find damage in the wiring or contacts and eliminate it:

The combined brake valve consists of two sections combined in one housing and is designed to control the pneumatic drive of the brakes of the tractor and trailer (semi-trailer)