AGCO Power 49 - Maintenance Procedures

3. Maintenance
3.1 Cylinder block ..........................................................3-5
3.1.1 Measuring cylinder liner wear ............................................3-5
3.1.2 Removing cylinder liner .................................................3-5
3.1.3 Checking cylinder block .................................................3-5
3.1.4 Changing camshaft bushing (33-49 engines) ..................................3-6
3.1.5 Changing camshaft bushing (66-98 engines) ..................................3-6
3.1.6 Fitting plug at camshaft rear end ..........................................3-8
3.1.7 Oversize bushings for camshaft ...........................................3-8
3.1.8 Fitting plug at camshaft rear end (oversize bushings) ............................3-9
3.1.9 Fitting cylinder liner ....................................................3-9
3.2 Flywheel housing ......................................................3-13
3.2.1 Fitting flywheel housing ................................................3-13
3.2.2 Changing crankshaft rear oil seal .........................................3-13
3.3 Cylinder head ..........................................................3-15
3.3.1 Removing cylinder head ................................................3-15
3.3.2 Removing valves .....................................................3-15
3.3.3 Checking cylinder head ................................................3-15
3.3.4 Changing valve guides .................................................3-17
3.3.5 Machining valve seat ..................................................3-17
3.3.6 Changing valve seat rings .............................................. 3-17
3.3.7 Grinding valves ......................................................3-18
3.3.8 Fitting valves ........................................................3-19
3.3.9 Fitting cylinder head .................................................. 3-19
3.4 Valve mechanism ......................................................3-21
3.4.1 Reconditioning valve mechanism .........................................3-21
3.4.2 Changing camshaft or camshaft gear ......................................3-22
3.4.3 Adjusting valves .....................................................3-23
3.5 Crankshaft .............................................................3-26
3.5.1 Removing crankshaft ..................................................3-26
3.5.2 Checking crankshaft ..................................................3-26
3.5.3 Changing crankshaft gears ..............................................3-27
3.5.4 Fitting crankshaft .....................................................3-28
3.5.5 Crankshaft hub piece ..................................................3-29
3.5.6 Checking element of the rubber damper (44-49 engines) ........................3-29
3.5.7 Viscose type vibration damper ...........................................3-30
3.6 Connecting rods and pistons ............................................3-31
3.6.1 Removing pistons together with connecting rods .............................3-31
3.6.2 Changing connecting rod bearings ........................................3-31
3.6.2.1 Piston pin bushing .............................................3-31
3.6.2.2 Big-end bearing ...............................................3-32
3.6.3 Checking connecting rod ...............................................3-32
3.6.4 Changing piston rings .................................................3-33
3.6.5 Checking pistons .....................................................3-34
3.6.6 Fitting piston pin .....................................................3-35
3.6.7 Fitting piston together with connecting rod ..................................3-35
3.7 Counterbalance in 4 cylinder engines ....................................3-36
3.7.1 Removing and disassembling counterbalance unit .............................3-36
3.7.2 Reconditioning counterbalance unit .......................................3-36
3.7.3 Fitting counterbalance unit ..............................................3-37
3.7.4 Changing crankshaft gear rim ............................................3-37
Table of contents
4th Generation Engines 3-1
8370 79492