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The steering gear is equipped with hydraulic limiters of the turning, which partially by-
pass the oil to drain when the wheels have not yet turned to the extreme position. Further turning
of the steerable wheels will be with additional effort on the steering wheel.
I.1.2.1.3 Steering hydraulic booster pump is shown in Fig. I.7.
The steering booster pump is blade-type and bilateral. During pump shaft rotation the
pump blades cling to the curved surface of the stator under the action of centrifugal force and oil
pressure under the stator. In increasing spaces the oil flows into the space between the blades and
is then expelled from the decreasing space with the rotor wheel rotation.
Two valves are located in the pump cap. The bypass valve limits the amount of oil deliv-
ered by the pump into the steering gear. The safety valve inside the bypass valve limits the oil
pressure in the system by opening at the pressure of 15-16 MPa (150-160 kgf/cm
2
).
Control the hydraulic steering booster pump belt tension with the force of 40 N (4 kgf) in
the middle of the branch in the direction of the arrow «c». The deflection of each belt shall be 6-
11 mm. Adjust the belt tension with the screw 11 with subsequent locking by the nut 12.
1-bolt; 2-collector; 3-packing ring; 4-body; 5-bushing; 6-washer; 7-nut; 8-shaft; 9- segment dowel pin; 10-
pulley; 11adjusting screw; 12-nut; 13-belt; I- pump installation;
а
-delivery; b-pumping;
с
-belt tension di-
rection
Fig. I.7 - Steering hydraulic booster pump
I.1.2.1.4 Steering rods. Tie-rod ends are solid and non-serviceable. Durability of steer-
ing tie-rod ends depends on the condition of protective couplings, so the couplings damaged dur-
ing the operation must be replaced. When a significant play occurs in the tie-rod end joints they
shall be replaced.
