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5.2 Transmission
The description of clutch and gearbox design as well as instructions for their operation
and maintenance are given in the Operation Manual by Yaroslavl Motor Works.
5.2.1 The Hydraulic Clutch Linkage with the Air-over-Hydraulic Booster (AHB)
5.2.1.1 The master cylinder 7, (Fig. 29), is located in the engine compartment and is
mounted on the bracket to the cab front panel.
When the clutch pedal is pressed down, the liquid pressure from master cylinder is deliv-
ered through piping 16 to the Air-over-Hydraulic Booster (AHB). The liquid in the AHB pushes
the rod and opens the pneumatic system valve simultaneously.
The pneumatic part comprises the 10 liter receiver 17, installed inside the left side-
member, back-pressure valve 18 and piping. The air from the separate pneumatic part flows into
the AHB.
1-reserve tank; 2-tank cap; 3-bolt; 4-nut; 5,14-supporting brackets; 6-cylinder stop; 7-master cylinder; 8-
pedal mechanism; 9,26-springs; 10-brake pedal; 11-clutch pedal stop; 12, 15-brake pedal rods; 13-brake
valve control lever; 16-hydraulic drive pipeline; 17-nonbrake consumer receiver; 18-back-pressure valve;
19,22-piping; 20-moisture-and-oil separator with four line valve; 21-plug; 23-hydraulic fitting; 24- T-joint;
25-clutch pedal; 27- hose pipe; pedal full travel L=185-190mm; b-clearance
Fig. 29 - Clutch Release Control
