Knocking-out and inserting steel balls for main oil ducts
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01—130 Knocking-out and inserting steel balls for main oil ducts
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Tightening torques
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Nm
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Necked-down screw for driven plate and flywheel
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initial torque
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40
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torque angle
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90°-100°
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Note
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Since October 1976 the 2 main oil ducts (arrows) in cylinder crankcase at transmission end are closed by means of steel balls 15 mm dia. VO DIN 5401 part no. 005401 515001.
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For cleaning main oil ducts during engine repairs, the steel balls must be knocked-out from direction of front end of engine.
Undamaged steel balls can be used several times without refinishing ball seat in crankcase.
Damaged and rusty steel balls should be replaced.
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01.2-130/1 F3
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Knocking-out steel ball in upper main oil duct
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1 Remove transmission.
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2 Remove flywheel (03-410).
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3 Remove radiator (20-420).
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4 Remove vibration damper (03—340).
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5 Unscrew closing plug (1) and screw oil pressure relief valve out of main oil duct.
6 Knock-out steel ball from direction of engine front end by means of a round steel bar 13 mm dia. and approx. 700 mm long.
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Knocking-out steel ball in lower main oil duct
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1 Remove transmission.
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2 Remove flywheel (03-410).
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01.2-130/2 F3
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3 Remove radiator (20-420).
4 Remove vibration damper and compensating weight (03-340).
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103-8363
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5 Remove complete oil pan (01—310).
6 Remove oil pump (18-210).
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7 Remove slide rail (2b) in crankcase (05—340).
8 Knock-out steel ball from direction of engine front end by means of a round steel bar 13 mm dia. and approx. 700 mm long.
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01.2-130/3 F3
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Closing main oil duct
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1 Thoroughly clean ball seat and bore in main oil duct.
2 Coat up on self-made knocking-in mandrel with grease and place steel ball into cup.
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103-13 405
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Material: C 45
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3 Position steel ball with knocking-in mandrel and knock-in up to stop on mandrel.
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If the mandrel has no stop, do not exceed dimension a = max. 3 mm to prevent cracking of crankcase.
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a = max. 3 mm
b= dia. 14.75 to 14.86 mm
c = oil ducts to crankshaft bearing
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01.2-130/4 F3
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4 Mount all parts taken off or removed.
5 Run engine warm and check for leaks.
Note: If oil flows out as the result of a leaking ball seat, knock-out respective steel ball and close main oil duct with a closing plug after cutting the required threads into duct.
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Closing main oil duct with closing plug
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1 Cut threads M 16 x 1.5 mm approx. 14 mm deep into respective main oil duct.
2 Carefully clean main oil duct.
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3 Screw closing plug M 16 x 1.5 mm DIN 908, part no. 000 908 016 001 with aluminum sealing ring A 16 x 22 mm DIN 7603 – AL, part no. 007 603 016 102, and tighten to 40 Nm.
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01.2-130/5 F3
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