19.1 Crankshaft distances
Minimum crankshaft distances have to be followed in order to provide sufficient space between engines for maintenance and operation.
Figure 19.1Minimum crankshaft distances, main engine (DAAE006291)
E Engine
1970 / 2020 4L20
1970 / 2020 6L20
2020 8L20
2020 9L20
Figure 19.2Minimum crankshaft distances, generating sets (DAAE007434)
19. Engine room layout
19.2 Space requirements for maintenance
19.2.1 Working space reservation
The required working space around the engine is mainly determined by the dismounting dimensions of some engine components, as well as space requirement of some special tools. It is especially important that no obstructive structures are built next to engine driven pumps, as well as camshaft and crankcase doors.
However, also at locations where no space is required for any engine part dismounting, a minimum of 1000 mm free space everywhere around the engine is recommended to be reserved for maintenance operations.
19.2.2 Lifting equipment
It is essential for efficient and safe working conditions that the lifting equipment are applicable for the job and they are correctly dimensioned and located.
The required engine room height depends on space reservation of the lifting equipment and also on the lifting and transportation arrangement. The minimum engine room height can be achieved if there is enough transversal and longitudinal space, so that there is no need to transport parts over insulation box or rocker covers.
Separate lifting arrangement for overhauling turbocharger is required (unless overhead travelling crane, which also covers the turbocharger is used). Turbocharger lifting arrangement is usually best handled with a chain block on a rail located above the turbocharger axis.
See Chapter General data and outputs for the necessary hook heights.
19.3 Handling of spare parts and tools
Transportation arrangement from engine room to storage and workshop has to be prepared for heavy engine components. This can be done with several chain blocks on rails or alternatively utilising pallet truck or trolley. If transportation must be carried out using several lifting equipment, coverage areas of adjacent cranes should be as close as possible to each other.
Engine room maintenance hatch has to be large enough to allow transportation of main components to/from engine room.
It is recommended to store heavy engine components on slightly elevated adaptable surface e.g. wooden pallets. All engine spare parts should be protected from corrosion and excessive vibration.
On single main engine installations it is important to store heavy engine parts close to the engine to make overhaul as quick as possible in an emergency situation.
19.4 Required deck area for service work
During engine overhaul some deck area is required for cleaning and storing dismantled components. Size of the service area is dependent of the overhauling strategy chosen, e.g. one cylinder at time, one bank at time or the whole engine at time. Service area should be plain steel deck dimensioned to carry the weight of engine parts.
140 Marine Project Guide W20 - 1/2005
19. Engine room layout
Figure 19.3Service space for W20 engine with turbocharger in driving end (1V69C0301a) Height for overhauling piston and connecting rod
A1
2300 Height for transporting piston and connecting rod freely over adjacent cylinder head covers
A2
2400 2400
2300 Height for transporting piston and connecting rod freely over exhaust gas insulation box
A3
1200 Width for dismantling charge air cooler and air inlet box sideways by using lifting tool
B1
1580 Height of the lifting eye for the charge air cooler lifting tool
B2
390 Recommended lifting point for charge air cooler lifting tool
B3
590 Recommended lifting point for charge air cooler lifting tool
B4
800 / 560 Removal of main bearing side screw, flexible / rigid mounting
C1
635 Distance needed for dismantling lubricating oil and water pumps
D1
With PTO: lenght + 515 mm Without PTO: 650 mm Distance needed for dismantling pump cover with fitted pumps
E1
710 710
650 The recommended axial clearance for dismantling and assembly of silencers. Minimum
axial clearance: 100 mm (F2) F1
1170 1170
990 Recommended distance for dismantling the gas outlet elbow
F3
300 Recommended lifting point for the turbocharger
G1
345 Recommended lifting point sideways for the turbocharger
G2
1250 Width for dismantling lubricating oil module and/or plate cooler
H1
445 Recommended lifting point for dismantling lubricating oil module and/or plate cooler
H2
1045 Recommended lifting point sideways for dismantling lubricating oil module and/or plate
cooler H3
1300 1300
1000 Camshaft overhaul distance (free end)
I1
1300 1300
1000 Camshaft overhaul distance (flywheel end)
I2
1010 Space necessery for access to the connection box
J1
19. Engine room layout
Figure 19.4Service space for W20 engine with turbocharger in free end (1V69C0302a) Height for overhauling piston and connecting rod
A1
2300 Height for transporting piston and connecting rod freely over adjacent cylinder head covers
A2
2400 2400
2300 2230
Height for transporting piston and connecting rod freely over exhaust gas insulation box A3
1200 Width for dismantling charge air cooler and air inlet box sideways by using lifting tool
B1
1580 Height of the lifting eye for the charge air cooler lifting tool
B2
550 550
550 260
Recommended lifting point for charge air cooler lifting tool B3
560 Recommended lifting point for charge air cooler lifting tool
B4
800 / 560 Removal of main bearing side screw, flexible / rigid mounting
C1
635 Distance for dismantling lubricating oil and water pump
D1
With PTO: lenght + 515 mm Without PTO: 650 mm Distance for dismantling pump cover with fitted pumps
E1
750 750
650 590
The recommended axial clearance for dismantling and assembly of silencers. Minimum axial clearance: 100 mm (F2)
F1
1120 1120
990 890
Recommended distance for dismantling the gas outlet elbow F3
350 Recommended lifting point for the turbocharger
G1
320 Recommended lifting point sideways for the turbocharger
G2
1250 Width for dismantling lubricating oil module and/or plate cooler
H1
445 Recommended lifting point for dismantling lubricating oil module and/or plate cooler
H2
1045 Recommended lifting point sideways for dismantling lubricating oil module and/or plate
cooler
Camshaft overhaul distance (free end) I1
1300 1300
1000 700
Camshaft overhaul distance (flywheel end) I2
845 Space necessery for access to the connection box
J1
142 Marine Project Guide W20 - 1/2005
19. Engine room layout
Figure 19.5Service space for W20 based gensets (DAAE006367) Height for overhauling piston and connecting rod
A1
2300 Height for transporting piston and connecting rod freely over adjacent cylinder head covers
A2
2400 2400
2300 2230
Height for transporting piston and connecting rod freely over exhaust gas insulation box A3
1200 Width for dismantling charge air cooler and air inlet box sideways by using lifting tool
B1
1580 Height of the lifting eye for the charge air cooler lifting tool
B2
550 550
550 260
Recommended lifting point for charge air cooler lifting tool B3
560 Recommended lifting point for charge air cooler lifting tool
B4
560 Width for removing main bearing side screw
C1
635 Distance needed to dismantle lube oil and water pump
D1
650 Distance needed to dismantle pump cover with fitted pumps
E1
750 750
650 590
The recommended axial clearance for dismantling and assembly of silencers Minimum axial clearance: 100 mm (F2)
F1
1120 1120
990 890
Recommended distance for dismantling the gas outlet elbow F3
350 Recommended lifting point for the turbocharger
G1
320 Recommended lifting point sideways for the turbocharger
G2
1250 mm (and/or plate cooler) Width for dismantling lube oil module
H1
445 mm (and/or plate cooler) Recommended lifting point for dismantling lube oil module
H2
1045 mm (and/or plate cooler) Recommended lifting point sideways for dismantling lube oil module
H3
1300 1300
1000 700
Camshaft overhaul distance (free end) I1
1300 1300
1000 700
Camshaft overhaul distance (flywheel end) I2
1762 Space necessary for access to the connection box
J1
19. Engine room layout