The valve cone K 43540 is a precision flow-control and sealing component of the throttle-type non-return valve K 43537 used in the starting-air system of the Adriadiesel/Jugoturbina/Zgoda/Sulzer ZV40/48 engine. Working together with its corresponding valve seat and spindle mechanism, the cone controls the effective flow area as the valve opens and closes, while also providing the sealing action required to prevent undesirable reverse flow. The geometry, concentricity, seating surface, and surface finish of the K 43540 are therefore particularly important, as even localized wear, deposits, pitting, or deformation can reduce sealing effectiveness and alter the intended flow characteristics of the valve. During repeated engine starts, the valve cone is exposed to compressed-air pressure forces, cyclic seating impacts, mechanical contact, vibration, and possible contamination carried by the air system, requiring dependable wear resistance and dimensional stability. During overhaul, the cone and corresponding seat should be carefully inspected for scoring, erosion, corrosion, deposits, uneven contact patterns, or other damage affecting tightness or free movement. By providing controlled flow regulation together with reliable sealing against reverse flow, the K 43540 valve cone contributes to stable operation of the K 43537 assembly, dependable starting-air control, protection of associated components, and reliable starting performance of the ZV40/48 engine.

The spindle K 43539 is a precision guiding and motion-transmitting component within the throttle-type non-return valve K 43537 of the Adriadiesel/Jugoturbina/Zgoda/Sulzer ZV40/48 starting-air system. Its principal role is to guide and support the movement of the associated valve element, helping maintain accurate axial alignment as the valve responds to pressure changes and controls the passage of starting air. Smooth and unrestricted spindle movement is particularly important because sticking, excessive clearance, bending, or surface deterioration can interfere with the opening and closing characteristics of the valve and compromise both its throttling and non-return functions. During operation, the K 43539 may be subjected to repeated axial movement, pressure forces, mechanical contact, vibration, and long periods in a stationary position between starting cycles, making dimensional accuracy, straightness, surface finish, and resistance to corrosion and wear essential. During maintenance or overhaul, the spindle and its guiding surfaces should be inspected for scoring, wear, bending, corrosion, deposits, or other damage that could restrict free movement. By providing accurate guidance and dependable transmission of valve movement, the K 43539 spindle contributes to consistent valve response, controlled starting-air flow, reliable prevention of reverse flow, and long-term operational reliability of the ZV40/48 starting system.

The housing K 43538 is a fundamental structural and pressure-containing component of the throttle-type non-return valve K 43537 used in the starting-air system of the Adriadiesel/Jugoturbina/Zgoda/Sulzer ZV40/48 engine. Its primary function is to provide a precisely dimensioned enclosure for the internal valve components while maintaining their correct alignment and providing the flow passages required for controlled movement of the starting air. Because the housing forms the mechanical foundation of the valve assembly, accurate machining of its internal bores, valve seating areas, guiding surfaces, threaded connections, and sealing interfaces is particularly important for dependable operation. During service, the K 43538 is exposed to repeated compressed-air pressure cycles, vibration, temperature variations, and long periods of operational readiness, requiring good dimensional stability, mechanical strength, and resistance to corrosion and wear. During overhaul, the housing should be carefully inspected for cracks, corrosion, damaged threads, worn guiding surfaces, deposits, and deterioration of sealing or seating areas. By securely supporting and accurately positioning the internal components of the K 43537 valve, the K 43538 housing contributes to controlled starting-air flow, reliable non-return operation, pressure integrity, and dependable long-term performance of the ZV40/48 starting system.

The complete throttle-type non-return valve K 43537 is an important flow-control and protective component associated with the starting air stop valve of the Adriadiesel/Jugoturbina/Zgoda/Sulzer ZV40/48 engine. Its function combines controlled restriction of the starting-air flow with non-return protection, allowing the medium to flow in the intended direction while helping prevent undesirable reverse flow through the starting-air system. This controlled flow behavior supports stable operation of the associated starting-air stop valve and helps protect the starting system from pressure disturbances that could otherwise affect reliability or connected components. As a complete valve assembly, the K 43537 must maintain correct internal clearances, sealing surfaces, moving-element freedom, and flow characteristics while being subjected to repeated pressure cycles, compressed-air conditions, vibration, and extended periods of service readiness. During maintenance or overhaul, the valve should be inspected for contamination, corrosion, sticking, damaged sealing surfaces, worn internal components, or deposits that could restrict movement or compromise its non-return function. By combining controlled throttling with dependable prevention of reverse flow, the complete K 43537 valve contributes to safe and reliable starting-air control, stable starting-system performance, protection of associated components, and dependable starting of the ZV40/48 engine.

The disc K 43178 is a precision functional component designed for the rotary slide valve K 43173 within the starting device of the Adriadiesel/Jugoturbina/Zgoda/Sulzer ZV40/48 engine. Working as an integral part of the rotary valve arrangement, the disc helps establish the required control relationship between the valve's moving and stationary elements, supporting accurate distribution of the starting medium during the engine starting sequence. Its geometry, angular relationship, flatness, surface finish, and dimensional accuracy are important for maintaining controlled movement and the intended communication between the relevant passages as the rotary slide valve changes position. Repeated operation exposes the K 43178 to mechanical contact, friction, pressure differences, vibration, and possible contamination, making good surface condition and resistance to wear essential for dependable service. During maintenance or overhaul, the disc and its mating surfaces should be inspected for scoring, uneven wear, corrosion, deposits, deformation, or other damage that could affect movement, sealing, or distribution accuracy. By supporting the precise function of the K 43173 rotary slide valve, the K 43178 disc contributes to consistent starting-medium control, reliable starting-system operation, reduced leakage and wear, and dependable long-term starting performance of the ZV40/48 engine.

The rotary slide valve K 43173 is a precision control component within the starting device of the Adriadiesel/Jugoturbina/Zgoda/Sulzer ZV40/48 engine, where it helps regulate and sequence the distribution of the starting medium during engine start-up. Through controlled rotary movement, the valve brings its ports or control passages into the required positions, allowing the starting system to direct the starting medium according to the engine's prescribed starting sequence. Accurate angular positioning, dimensional precision, surface condition, and suitable operating clearances are particularly important because wear, sticking, contamination, or excessive leakage can disturb the distribution sequence and reduce starting reliability. During operation, the K 43173 is exposed to repeated starting cycles, pressure forces, friction, vibration, and long periods of readiness between starts, requiring dependable movement and resistance to wear and corrosion. During overhaul, its sliding and sealing surfaces, ports, clearances, and associated components should be inspected for scoring, deposits, corrosion, deformation, or excessive wear. By providing accurate and repeatable control of the starting-medium distribution, the K 43173 rotary slide valve contributes to reliable engine starting, correct sequencing of the starting system, reduced mechanical stress, and dependable operational readiness of the ZV40/48 engine.

The thrust washer K 43170 is a precision load-bearing and positioning component designed specifically for the distributing disc K 43169 within the starting device of the Adriadiesel/Jugoturbina/Zgoda/Sulzer ZV40/48 engine. Its principal function is to absorb and distribute axial forces acting on the distributing disc while maintaining the required axial position and operating clearance necessary for smooth and accurate movement of the starting mechanism. By providing a defined thrust surface between adjacent components, the washer helps prevent direct wear of the distributing disc and surrounding parts while supporting stable operation through repeated starting cycles. Accurate thickness, flatness, surface finish, and wear resistance are particularly important because excessive wear or deformation can change the axial clearance, increase friction, and adversely affect the movement or positioning of the K 43169 distributing disc. During overhaul, the K 43170 and its mating surfaces should therefore be inspected for scoring, wear, deformation, cracking, overheating, or other surface damage. By maintaining controlled axial loading and correct positioning of the distributing disc, the K 43170 thrust washer contributes to smooth starting-device operation, reduced component wear, consistent distribution performance, and reliable long-term operation of the ZV40/48 starting system.

The distributing disc K 43169 is a precision control component within the starting device of the Adriadiesel/Jugoturbina/Zgoda/Sulzer ZV40/48 engine, where it supports the controlled distribution of the starting medium within the starting system. Its accurately manufactured geometry and passages or control surfaces are intended to coordinate the delivery of the starting medium according to the required starting sequence, helping the engine achieve reliable and orderly rotation during start-up. Because correct distribution and timing are essential for effective starting, the position, surface condition, dimensional accuracy, and freedom of movement of the K 43169 are particularly important. During operation, the disc may be exposed to repeated starting cycles, pressure forces, mechanical contact, friction, vibration, and possible contamination from the working system, all of which can influence its long-term performance. During maintenance or overhaul, its functional surfaces, passages, contact areas, and associated components should be checked for wear, scoring, corrosion, deposits, obstruction, or deformation that could interfere with proper distribution. By supporting accurate and repeatable control of the starting sequence, the K 43169 distributing disc contributes to reliable engine starting, balanced operation of the starting system, reduced mechanical stress, and dependable readiness of the ZV40/48 engine.

The bush K 43163 is a precision bearing and guiding component designed for the housing K 43161 of the starting device used on the Adriadiesel/Jugoturbina/Zgoda/Sulzer ZV40/48 engine. Its primary function is to provide an accurately dimensioned bearing surface for the associated moving component, maintaining correct alignment while reducing friction and protecting the housing itself from direct mechanical wear. During repeated starting cycles, the bush can be subjected to sliding or rotational movement, cyclic loads, vibration, and localized contact pressures, making dimensional accuracy, suitable bearing properties, correct running clearance, and effective lubrication where applicable particularly important. As a replaceable wear component, the K 43163 also helps protect the more substantial K 43161 housing from premature deterioration and potentially more extensive repair requirements. During overhaul, the bush and its corresponding shaft or moving surface should be inspected for excessive clearance, scoring, wear, deformation, contamination, or other abnormalities. By providing accurate guidance and a controlled bearing interface within the starting-device housing, the K 43163 bush contributes to smooth mechanical movement, reduced friction and wear, correct component alignment, and dependable long-term operation of the ZV40/48 starting system.

The thrust washer K 43162 is a precision load-bearing and positioning component designed for the starting device associated with housing K 43161 on the Adriadiesel/Jugoturbina/Zgoda/Sulzer ZV40/48 engine. Its primary function is to absorb and distribute axial forces generated within the starting mechanism while maintaining the correct axial relationship and controlled movement of the associated components. Although relatively simple in form, the thrust washer performs an important protective function by providing a defined contact surface between components, helping prevent direct wear of more substantial parts and supporting stable operation during repeated starting cycles. The K 43162 must therefore maintain accurate thickness, flatness, surface condition, and adequate resistance to wear under cyclic loading, vibration, and repeated mechanical contact. During maintenance or overhaul, the washer and its mating surfaces should be inspected for scoring, excessive wear, deformation, cracking, overheating, or other damage that could alter axial clearance or load distribution. By controlling axial loads and preserving the correct positioning of the starting-device components, the K 43162 thrust washer contributes to smooth mechanical operation, reduced wear, reliable starting performance, and extended service life of the K 43161 starting-device assembly.