SERVICE MANUALROBERT BOSCH MODEL MW INJECTION PUMPSection 11REPLACING TIMING POINTER PLUG OR GASKETThe plug should be installed using Loctite hydraulicsealant. The gasket can be re-used. (Figure 33)Figure 33.ADJUSTING LOW IDLE SPEEDWhen the upper end of the control lever is moved fullytowards the governor housing, the control lever willcontact the low idle stop. The low idle speedspecification, with the engine at operating temperature, is625-675 rpm.To adjust low idle speed, loosen locknut with a 10 mmwrench and raise or lower low idle stop (bolt) with an 8mm wrench (Figure 34).Raise stop to increase speed, lower to decrease speed.Tighten locknut when specified speed is reached. Tocompensate for parasitic loads which affect low idlespeed, low idle speed should be set slightly higher soengine speed will be within specifications when load isapplied. Examples of major parasitic loads are mixerdrums and automatic transmissions.Figure 34.REPLACING OUTER THROTTLE CONTROL LEVERThe outer throttle control lever attaches to the injectionpump control shaft and is retained by a capscrew, spacerwasher, washer, lock washer and nut (Figure 35). Thespacer washer must be installed inside control lever slotto prevent lever breakage. Torque capscrew to 55 lb-in.Injection pump calibration is required if the inner controllever must be replaced because individual leverdimensions vary sufficiently to affect pump calibration.CGES-185-3PRINTED IN UNITED STATES OF AMERICAPage 23
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