Piston With Oblique Cut Connecting Rod
A threaded i-bolt hole will be provided in the big end housing for support. Turn the crankshaft till the con-rod bolts are accessible for opening and removing the bottom housing (30 Deg after TDC or as prescribed in the manual). Take weight of the piston by a chain block from top.
Use hydraulic jack as described in “Operating procedures for tools” section after checking the rated
pressure of the big end nuts. Once the nuts are loose, support the big end by chain block, rope, wooden plank etc., whatever is convenient to take out the bearing.
Take little weight on the top chain block to hang the piston and lift the piston by 20mm. While removing the bottom half of the con-rod, tie the bearing shell to the half with a piece of cloth to avoid
falling or slipping inside the crankcase.
Before removing the bottom bearing shell and bottom support, mark it with a permanent marker or by
stamping. After getting some space, remove the upper shell and mark it as “U” along with a unit number to avoid mixing up.
Install minimum two liner holding tools before removing the piston as a stuck piston may cause liner to come out from the jacket space. Once the connecting rod is free to remove, rotate the crankshaft such that the web goes free of the con-rod upper half simultaneously taking the piston weight on the top chain block. As the crankshaft is free of con-rod, start lifting the piston with the chain block and avoid damaging the crankpin surface. Remove piston and keep it on the piston stand table. Mark or stamp the unit number from where it is drawn out.
A threaded i-bolt hole will be provided in the big end housing for support. Turn the crankshaft till the con-rod bolts are accessible for opening and removing the bottom housing (30 Deg after TDC or as prescribed in the manual). Take weight of the piston by a chain block from top.
Use hydraulic jack as described in “Operating procedures for tools” section after checking the rated
pressure of the big end nuts. Once the nuts are loose, support the big end by chain block, rope, wooden plank etc., whatever is convenient to take out the bearing.
Take little weight on the top chain block to hang the piston and lift the piston by 20mm. While removing the bottom half of the con-rod, tie the bearing shell to the half with a piece of cloth to avoid
falling or slipping inside the crankcase.
Before removing the bottom bearing shell and bottom support, mark it with a permanent marker or by
stamping. After getting some space, remove the upper shell and mark it as “U” along with a unit number to avoid mixing up.
Install minimum two liner holding tools before removing the piston as a stuck piston may cause liner to come out from the jacket space. Once the connecting rod is free to remove, rotate the crankshaft such that the web goes free of the con-rod upper half simultaneously taking the piston weight on the top chain block. As the crankshaft is free of con-rod, start lifting the piston with the chain block and avoid damaging the crankpin surface. Remove piston and keep it on the piston stand table. Mark or stamp the unit number from where it is drawn out.
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