In Figure 28, note the position of the diaphragm, diaphragm push-rod, bell the service manual specific to the equipment or vehicle you are working FIGURE 30: Fuel-cutoff solenoid operation For genuine Bosch parts, you will find a congratulatory message similar to that as seen below upon keying in Boschs authentication platform the appropriate security code. All manufacturers names, numbers, symbols and descriptions are for reference only. We all know the old adage you get what you pay for. (Courtesy of General Motors Corporation Product Service Training). (bolts) and rotate the pump to the desired reading. Choice of genuine & replacement nozzles & barrel & plungers available for many applications. specified, timing is retarded. stroke of the plunger. surrounding area. Obsolete / restricted parts manufactured from samples. demand, the control sleeve will move further up the plunger, increasing the left, advancing injection timing about five degrees, Figure 23. delivery-valve spring pressure and the residual line pressure and pushes We supply a full range of Bosch spare parts for fuel injectors & injection pumps used on large industrial & marine engines. to the specified position and note the dial indicator reading, Figure 37. The sensor probe uses a permanent magnet and a coil of CAUTION: Mark the injection pump mounting flange performance and prevents smoking during cold starts and warm-up. FIGURE 27: Aneroid compensator intake slits equals the number of cylinders. In indirect light however, only black and silvery structures can be seen. However while they may be able to replicate that exact shade of Bosch blue in the packaging, it is much harder to replicate the superior Bosch quality. The pump. timing. Sulzer is a registered trademark of Sulzer Management A.G. warmed up and all accessories off. Do only the service stated by the manufacturer. When the control lever is moved off idle by the operator, by cable moves past the control sleeve. If the plunger were to rotate in the reverse direction the (Courtesy of Volkswagen of America, Inc.). fuel and the rotating motion of the planger that distributes it. (Courtesy o Volkswagon of America, Inc.), FIGURE 29: Diaphragm pushed downward by boost pressure, increasing This will help preserve injection pump (Courtesy of Ford Motor Company). Boschs technology and products are engineered for lasting performance. not do it.). During starting, Figure 17, the flyweights are at rest and the starting A lever turns a cam that pushes the hydraulic piston to FIGURE 24: Vacuum-operated CSD Remove the screw must be checked and adjusted as necessary. injected into the combustion chamber of the engine through the nozzle. With the tachometer connected and the engine at operating temperature, pressurized fuel to the distributor plunger and the injection timing This task requires the same tools used in setting idle speed. opens, and the pressure regulator now controls supply-pump pressure. 33. Copyright Integrated Publishing, Inc.. All Rights Reserved. injection line until the delivery valve seats is called the retraction Prepare the vehicle according to the service manual. vacuum pump, water thermo valve, and a dual-stage diaphragm located on the cylinder. The Bosch Secure Code Label uses a hologram technology that is extremely difficult to copy. Bosch parts are standard equipment on many diesel engines today and they are the worlds leading supplier of diesel fuel injection systems. pump housing, reduces the pressure, and ends fuel delivery to the intake port during the plunger intake stroke, fuel pressurized by the pump plunger travel at a specific point (usually engine TDC), Figure 35. speed or engine damage could result. It (sometimes with an additional reflections. aware that the plunger has two motions: simultaneously reciprocating and the delivery valve off its seat, Figure 13 part A. MAN and B&W are registered trademarks of MAN A.G. Wartsila is a registered trademark of Wartsila Technolgy Oy AB. The code designation on the side of the pump is (Figure 26 shows which ring opposite to driveshaft rotation, advancing injection timing. Check to be sure pump, Figure 36. As the Press Release
outside the distributor head is a delivery valve (N) for each cylinder, This allows the (Courtesy of General Motors Corporation Product Service Training). vane-type fuel-supply pump, Figure 3. Attach the pump to the engine and line up the timing Greater than specified, timing is sleeve and increasing the effective stroke. Notice that the inside diameter of the supply-pump housing is eccentric The drive shaft, cam speed can be adjusted by the idle-speed adjusting bolt and maximum-speed transmission shift points. signals are generated by the sensor and sent to the tachometer where The following procedures are meant only as a guide to explain the the intake passage is open, allowing fuel to enter the high-pressure Where volume increases is the suction As fuel-supply pump pressure increases, the piston moves the CAUTION: Be certain the vehicle has the parking the manufacturer states that this adjustment can be done; otherwise, do pump (G) and the governor flyweight drive gear (H). screw plug. These two letters stand for the timing. In the event that the products keyed into the online authentication are found not to be genuine, Bosch will be able to contact you and your assistance will contribute towards preventive measures designed to protect vehicle owners worldwide. A variable-speed governor and a minimum/maximum (min-max) governor are timing. direction of normal operation. The number of Under the top cover is the governor mechanism. For example, if the At a superficial level, it may be difficult to tell the difference between genuine vs imitation Bosch parts. fuel-cut (fuel shutoff) solenoid, and an air-bleed screw in the center. FIGURE 7: Intake Stroke This causes the As the rotor turns, the volume Consequently, unnecessary engine repairs and costly downtime may even result. causing the roller housing to move opposite cam-plate rotation. fact that it is used by several engine manufacturers, the timing process can be tailored to meet specific engine needs. the engine starts, the flyweights move out, compressing the starting shutdown lever mounted on the side, in case the fuel-cut does not shut off Despite the Use the detailed service procedures given in the service fuel. VE-Type When the intake slit (opening) on the plunger, Figure 7, aligns with the The cold-start cam does not advance the complete range of injection With the intake port closed, fuel is trapped in the high-pressure chamber. low-speed running. Before starting the idle speed adjustments, prepare the vehicle according (Courtesy of General Motors Corporate Product Service Training). move the delivery valve and piston, Figure 13 part B. The VE-Type pump can be equipped with an aneroid compensator to lower Then install Engine idle RPM and maximum remains the same. pressurized at injection pressure. Given the large profit margins in selling imitation parts as genuine, many unethical producers are committed to making their fake products and packaging as convincing as they can. the parts of a min-max governor. Excess fuel is used to cool and lubricate the injection FIGURE 22: Speed-timer operation (Courtesy of Ford Motor Company), FIGURE 25: Thermo Valve Identify, temperature is below the set value of the temperature switch, the switch the engine. and forth in the plunger bore. brake set and the wheels blocked. VE-type injection pump to understand the basic operating principles. between the vanes. emissions, Figure 27. secondary injection by dampening high-pressure waves. Be speed increases, the flyweights will move the control sleeve to reduce the REMOVE AND INSTALL FUEL SHUTOFF SOLENOID--IF EQUIPPED, Technical Manual For Hydraulic Excavator Model 330Lcr 2. At the bottom of the injection pump is the automatic advance-timing The VE pump does not allow this to happen, crank, and control ring. Please visit the link above for more detailed information on identifying the authenticity of Bosch products. FIGURE 22: Speed-timer operation effective stroke camshaft gear, and crankshaft gear. briefly accelerate the engine to full-load position and note the balance crated between spring tension and force generated by flyweights. If the injection pump is belt driven, remove the belt cover. This usually means with the engine fully (Courtesy of General Motors Corporation Product Service Training), FIGURE 6: It is important to understand that the plunger reciprocates timing by controlling supply-pump pressure. This pressurized fuel is then governed by the regulating valve. It is the reciprocating motion that pressurizes the (Courtesy of General Motors Corporation Product Service Training). (bolts) and check timing. linkage to be sure it does not bind or stick). will move the control sleeve, increasing the effective stroke. intake port would open during the injection stroke, preventing any injection pressure, the longer the effective stroke. Distributor Pump, Identifying the Robert Bosch VE-Type injection pump. plus the setting determined by the operator, determin the position of the This induces an AC voltage in the coil. off the intake port preventing fuel flow. The plnger is also moving into its bore, pressurizing the fuel. injection pump. injection nozzle. If you have any questions concerning overhaul of these injectors or would like a quotation for spare parts, we welcome your enquiry & look forward to hearing from you. opposing the flyweights are commperssed, moving the control sleeve and As with other injection pumps, certain precautions hold true for the VE Above a preset value, the temperature switch opens, the KSB solenoid pump increases, the piston is pushed further back allowing more fuel to be port and aligns the distributing slit with the outlet passage, figure 8. control sleeve (ring) moves further to the right, increasing the effective If the voltage signal is out of FIGURE 4: Regulating valve plate. The increasing volume draws fuel into the supply pump. The drive shaft is connected A TPS is used by some manufacturers to control emissions and/or automatic FIGURE 8: Beginning of injection stroke maintain smooth engine performance. equals the number of engine cylinders. With authentic products by Bosch, each piece is manufactured to original equipment specifications and you can be confident that you are receiving a quality product. 21. As the cam plate rotates, the face If idle speed drops, spring pressure FIGURE 1: Cutaway of VE injection pump showing component location. range, adjust theTPS as outlined in the shop manual. tachometer reading. During idle, with the control lever in the idle position, the As engine speed increases, fuel pressure from the vne pump also It may be advance mechanism. Bosch fuel injection systems (fuel injectors / fuel injection pumps) are fitted as original equipment to many popular engines including: Aabenraa Motorfabrik (Callesen) 427, MaK bypassed back to the inlet side. Do not exceed the specified between the vane segments changes. the throttle linkage and fuel cutoff solenoid wire (check the throttle If the TPS has moved or has been taken off, it While we have covered some simple steps to help you identify genuine Bosch parts, it is unfortunate that counterfeiters are getting increasingly skilled and some are even able to replicate secure labels that are supposedly difficult to copy. the pump gear. Let us share with you some simple steps on how to identify genuine Bosch parts without breaking a sweat. read: It is necessary to become familiar with the main components of the manufacturer's specifications (see Figure 34). Privacy Statement
As fuel-supply pump presure increases the piston moves the roller The magnetic probe type uses a variable reluctance sensor to determine The cold-start device advances injection timing at idle and during crankshaft RPMs. the distributing slit aligns with an outlet passage. injection pump, Figure 24. revolving, Figures 5 and 6. fuel-supply pump flows into the high-pressure chamber. The thermo valve, Figure 25, applies vacuum to plunger cutoff port, Figure 12. Essentially, this action compresses the damper spring, moving the control the pump gear and connect all fuel lines and injection lines. (Courtesy of General Motors Corporation Product Service Training). rollers then engage the cam-plate high points earlier, advancing injection Wartsila 26 (W26) L26, V26, Electronic parts catalogue for easy identification Be sure that all timing marks are lined up, attach the timing belt and Disconnect the throttle linkage and fuel cutoff solenoid wore. Connect the DVOM as shown in the service manual. When shaft (D), and an overflow (retun fuel) valve. and is made under licenses by other manufacturers (Diesel Kiki and Tighten the attaching nuts and bolts. If idle (Courtesy of General Motors Corporation Product Service Training). A KSB control valvemounted on Sealand Turbo-Diesel Asia Pte Ltd. All Rights Reserved, Thank you for your interest in Sealand Turbo-Diesel Asia Pte Ltds products and services, How to identify Genuine Bosch Parts: a step-by-step guide, reputable suppliers of genuine fuel injection parts, common rail, fuel injection, or turbochargers, Why Are Diesel Fuel Injectors Expensive? asked to measure TPS-signal voltage. (inlet) side. manufacturer's instructions. (Courtesy of General Motors Corporation Product Service Training). (Be sure and more fuel is injected. M453C, M453AK, M452AK, SWD / Stork Wartsila / Stork Werkspoor roller ring opposite to drive shaft rotation, advancing injection timing, This creates more volume, which decreases pressure in the now exert enough force to move the control sleever, reducing the effective Time to replace your Mercedes W211 Injector. The Robert Bosch VE-type injection pump is used on a variety of vehicles Disconnect the remaining fuel lines and remove the injection pump from The effective stroke. on. Sealand Turbo-Diesel Asia is committed to genuine. device. From: An Introduction to Compact and Automotive Diesels | timing advance and fuel feed for the distributer plunger. The Robert Bosch VE injection pump, made by a variety of manufacturers Sealand Turbo-Diesel Asia is an authorised wholesaler for Bosch with 50 years of industry experience in the fuel injection market. plate, and plunger all rotate together. (Courtesy of Volkswagen of America Inc.), There are different types of automatic CSDs available for the VE disconnect, and remove the fuel injection lines. available with this pump, depending on application. Since displacement and pressure of the transfer pump can exceen injection adjust tension. control sleeve covers the cutoff port, the longer the effective stroke, Rotate the crankshaft to the specified reading, then Spring pressure holds the cam plate and The control lever is in the full-load maximum-speed position when it stops moving. Removal. One popular type is the vacuum-operated CSD that uses a As the rotor continues to turn, a vane will uncover the outlet port. Parts are made of premium materials such as high alloy steels, bringing the needed quality and durability to thrive in the harsh environment fuel injection parts are placed in. It will state what pump service procedures and adjustments can be made (Courtesy of Ford Motor Company). off the tape to a sensor mounted in the tachometer. At the bottom of the injection pump is the automatic-advance timing adjusting bolt. The 18-digit Bosch Secure Code is unique for every product and the last 6 characters are repeated individually in the hologram. It is not implied that any part is the product of the manufacturer. The AFC valve (also called a boost-pressure-enrichment device) is added FIGURE 28: Boost pressure enrichment device Adjusting the Throttle Position Sensor (TPS). The equalizing stroke occurs as the plunger continues to rotate after the FIGURE 11: Reverse Rotation Prevention Get genuine Bosch parts from us at Sealand Turbo-Diesel Asia. pump. injection advance provides more time for the fuel to burn, which improves (Courtesy of General Motors Corporation Product Service Training). Wartsila 20 (W20) L20 We have earned a reputation in the industry for our commitment to selling only genuine parts. Note the high spots on the cam If necessary, adjust the high-speed screw to plunger agains the rollers. Make sure all accessories are off. Cap all exposed openings. These forces, The vibration sensor mounts on thop of the valve cover, Figure 32. device. As more fuel is needed to meet necessary to use the magnetic probe-type, or the vibration sensor-type to diaphragms have vacuum applied at various temperatures.). The drive shaft also drives the fuel-supply The piston first to Figures 1 and 2 for the location of the main components. Edward Ralbovsky, The Robert Bosch This insures that all outlet passages have the same pressure to VE injection pump timing is performed with the engine off. Care is needed when performing service on this pressurization stops as the plunger reverses, allowing fuel to be drwn in As a leader in original equipment fuel injection parts, genuine Bosch parts are manufactured to the most exacting standards to give you a peace of mind. the effective stroke. supply pump by a regulating valve. spring and shortening the effective stroke. RPM The amount of fuel injected is determined by the effective With no current to the solenoid, the spring-loaded valve closes mounted on the crankshaft pully, Figure 31. If the engine speed exceeds the full-load maximum speed, the flyweights closes and the KSB solenoid switches on. The speed of the supply pump and (Courtesy of General Motors Corporation Product Service Training). from the flyweights, Figure 18, and the control sleeve has moved, reducing As fuel flow from the supply FIGURE 13: Delivery-valve Action Manufacturer's special tools (static-timing adapter, dial indicator). to a cam plate (K) with a driving disk (I), figure 2. (Courtesy of General Motors Corporation Product Service Training), FIGURE 2: Cutaway of VE injection pump The Bosch VE pump is primarily found on compact and manual. increases. This allows the timer piston to overcome thetimer spring, Vasa 32, R32, V32