Engine Assembly; Procedure Of Assembling Engine - Doosan DP158L Series Operation & Maintenance Manual

Engine Assembly

Procedure of Assembling Engine

CAUTION
• Cleanse all disassembled and disconnected parts.
Especially, clean the oil and coolant path with
compressed air and check if there is any resistance.
• Arrange general tools and special tools for engine
assembly.
• Prepare clean engine oil to be applied on each
sliding component.
• Prepare repair materials such as sealant and
gaskets.
• Replace used gaskets, seal rings, and expendable
parts with new ones.
• Each bolt should be tightened with the specified
tightening torque in the order of tightening;
however, excessive tightening torque should be
avoided.
• Ensure that all engine parts are successfully oper-
ating after reassembly.
• Check if any bolts are loose after the first assembly.
• Always keep hands clean during assembly.
Assemble the engine in the following order.
1. Attach tthe valve tapet and the oil spray nozzle.
1) Attatch the valve tapet(D).
2) Attatch 24 valve tapets as the same procedure.
3) Attach the oil spray nozzle(C).
4) Tighten 1 M14 hollow screw(B) at a tightening torque of
4 kgf·m.
5) Tighten 2 M6 fixing bolts(A) at a tightening torque of
1.2 kgf·m.
6) Attaht 12 oil spray nozzle as the same procedure.
2. Attach the crankshaft.dps
1) Attach the main bearing and the thrust bearing.
2) Attach the crankshaft(D).
3) Attach the bearing cap(C).
4) Attach 12 bearing cap as the same procedure.
5) Tighten M18 bearing cap bolt(B) at a tightening torque of
3. Attach the camshaft.
C
A
B
D
1) Apply engine oil inside cam hole and outside cam journal
2) Attach the camshaft(A) to the cylinder block.
DV2213095A
3) Align the cam gear marking to the crankshaft gear
Note) The engraved marks is "1".
89
5. About the engine
A
D
30 kgf·m + 90° by using the angle method.
of the cylinder block.
marking(Timing mark).
C
B
DV2213093A
A
DV2213094A