TM-9-2815-220-34 Direct Support Manual for AVDS-1790-2C and AVDS-1790-2D Engines Download
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TM 9-2815-220-34 Fisure 3-129. Removing or iruralling main bearing 011oc/1ing ru. NOTE Use caution when removing main bearing cap so that lower main sleeve bearing half does not drop out accidentally. Sleeve bearing halves can be easily damaged. d. Install crankcase spreading tꝏl Part No. WS61 (fig. 3-130) i n crankcase assembly midway be- tween two main bearing caps. Tighten spreading tꝏl just enough to release pressure of crankcase from ends of main bearing caps. Install mechanical puller Part No. 8708712 in mechanical adapter Part No. S7ǽ1. Install puller adapter into threaded hole provided in No. l main bearing cap. Gently tap the main bearing cap free of the crankcase using the slide hammer on puller. Remove main bearing cap and lower main sleeve bearing half and separate the bearing half from the cap. Mark sleeve bearing half with its respective location, using a grease pencil, for identification; e.g., "1 cap," "2 cap," etc. e. Remove remaining bearing caps (Nos. 2 through 7) and the lower sleeve bearing halves in similar manner using puller Part No. 8708712 and positioning the spreading tꝏl, Part No. 8708361, between bearing caps as necessary. Remove sleeve bearings from bearing caps. 3-54 Figure 3·130. emovillg 111ni11 bearing cap 1ui11g cra11kco1e 3preading tꝏl, me1anico/ odoprer and mechonicol puller. NOTE The crankshaft counterweights for con- necting rod bearing journals lR and lL and 6R and 6L must be in the position shown in fig. 3-131. The crankshaft will then clear the sides of the crankcase when it is removed. ) ) )