Cav Sims Bosch Distributo EP VA r-Type Fuel Injection Pump

REPAIR INSTRUCTIONS BO S CH 46 VDT-WJP 161/4 B Suppl. 3 , Ed. 1 Distributor-Type Fuel Injection Pump 0 460 . . EP/VA . H . C . . This cupplement describes the simplified method of measuring the spring chambers of the governor-control piston spring andthe electrical shut-off spring. 1. Measuring the governor-control piston spring chamber. 2. Measuring the electrical shut-off spring chamber.

1. Measuring the governor-control piston spring chamber These instructions replace Figs. 54 to 57 and the associated text in VDT-WJP 161/4 B. The remarks associated with Fig. 54 from „Setting the governor-control piston spring:" through "Push the control piston up against the mechanical stop." continue to apply. In the following measurement procedure the local- manufacture tool (Drawing 1) is used. (When making the tool be sure that the sliding parts are close fitted so that they cannot shift when the overall length of the tool is measured.) Initially, do not fit 0-rings on the shaft and on the bushing of the delivery rate control device. There should be no disc in the shaft. Insert the shaft into the bushing. Note the washer between the shaft and the bushing. Set the tool to an overall length of about 2 mm longer than dimension V given in the Test Specifications Sheet. Insert the tool instead of the governor-control piston spring into the shaft. Insert the bushing, shaft, and tool, with the slotted bushing forward, into the delivery rate control device port, Press only the bushing against the hydraulic head and control piston, which is resting against the mechanical stop, until the shoulder of the bushing rests against the pump housing. Pressing on the shaft will result in an incorrect measurement. Note: The drive pin on the shaft must not press against the 2 control piston.

Remove the bushing, shaft, and tool. Remove the tool from the shaft and measure its length. Compare the dimension measured and the specified dimension (dimension V), and compensate for the difference with suitable discs. Place 0-rings on the shaft (with assembling sleeve) and on the delivery rate control device bushing. 2. Measuring the electrical shut-off spring chamber These instructions replace Figs. 8 to 11 and the associated text in VDT-WJP 161/4 B, Supplement 1. The introductory remarks in Section d) "Electrical Shut-offs" from the beginning of the section through "This spring must be installed with a given initial tension" and the concluding remarks from "All other operations..." continue to apply. In the following measurement procedure the local-manufacture tool (Drawing 2), and measuring device KDEP 1023 with spring tester K DEP 1024 are used. (When making the tool be sure that the sliding parts are close fitted so that they cannot shift when the overall length of the tool is measured). Measure the length of the shut-off stroke at the hydraulic head with a depth gauge. Press the throttle in to its rest position for this measurement. The throttle projects out from the hydraulic head by the length of the shut-off stroke.

Initially, do not fit 0-rings on the shaft and on the bushing of the speed control device. There should be no disc in the shaft, Insert the shaft into the bushing. Note the washer between the shaft and the bushing. Insert the tool, with the slotted bushing forward, into the shaft. Set the tool to an overall length so that it is at the same height as the drive pin. 5 Press the throttle all the way into the hydraulic head, Insert the bushing, shaft, and tool into the speed control device port. Be sure that the drive pin on,the shaft engages the drive notch in the throttle. Press only the bushing against the hydraulic head until the shoulder of the bushing rests against the pump housing. Pressing on the shaft will result in an incorrect measurement.

Remove the bushing, shaft, and tool. Remove the tool from the shaft and measure its length. Place 0-rings on the shaft (with assembling sleeve) and on the speed control device bushing. With the measuring device set up the pressure spring for electrical shut-off. Clamp the measuring device with the spring tester and dial indicator EFAVV 64 — 1 687 233 014 — or EFAW 63 — 1 687 233 012 — in a vise. When using dial indicator EFAW 63 detach the spring. Place the bent measuring foot of the dial indicator up against the spring tester measuring sleeve, pre-load the indicator by 10 mm, and clamp it in that position. Set the unloaded spring tester to "0". Insert the pressure spring between the spring tester measuring sleeve and the adjusting pin of the measuring device. Press the spring against the spring tester measuring sleeve by turning the adjusting pin until the prescribed sprin4': pre-load given in the Test Specifications Sheet is indicated. Tighten the lock nut of the adjusting pin. Place the dial indicator measuring foot up against the measuring sleeve of the spring tester and set the indicator to "0". Remove the pressure spring from the measuring device. Place a try square against the adjusting pin and with the dial indicator measure the distance to the try square (see VDT-WJP 161/4 B, Edition 1, Fig. 32). Read dial indicator. Calculate the difference between the dimension read on the dial indicator and the dimension of the tool, and compensate for the difference with suitable washers.

Lc) co N 3 --- —OP.— 0,5 20--0— Special tools Material: Steel V ( \777 ) Drawing 1 0,5 Materiak Steel V ( VW ) Drawing 2 (/) = dia. All measurements in mm This publication must not be reproduced: its contents must not be transferred to other persons without our written permission. All rights reserved. Robert Bosch GmbH (7.73) D-7 Stuttgart 1, Postfach 50. Printed in the Federal Republic of Germany. Imprime en Republique Federale d'Allemagne par Robert Bosch GmbH.

Cav Sims Bosch Distributo EP VA r-Type Fuel Injection Pump

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