Technical Data Md6A - Volvo Penta MD6A Workshop Manual

Technical Data

Technical Data MD6A

General
Type designation
Output (DIN) at 40 rev/sec (2400 rev/mm)
Number of cylinders
Bore
Stroke
Capacity
Compression ratio
Compression pressure at starter motor speed
Direction of rotation, viewed towards flywheel
Idling speed
Oil pressure, hot engine
Oil pressure, idling, hot engine
Cylinders
Material
Bore, standard
0.500 mm (0.020") oversize
Pistons
Material
Height, total
Height from gudgeon pin centre to piston crown
Piston clearance in cylinder
Pistons, standard
0.500 mm (0.020") oversize
Gudgeon pins
Diameter
Gudgeon pin bushing, diameter
Clearance, gudgeon pin — bushing
Piston rings
Compression rings, number
Oil scraper ring, number
Upper compression ring has chromium lining
Piston rings are available for standard size and 0.500 mm
(0.020") oversize
Piston ring clearance in groove, axially:
Upper compression ring
Lower compression ring
Oil scraper ring
Piston ring gap in cylinder:
Upper compression ring
Lower compression ring
Oil scraper ring
Crankshaft
Material
Crankshaft axial clearance
Main bearing radial clearance
Connecting rod radial clearance
1)
Measured with Moto Meter nipple 884535 and yoke 884543.
MD6A
7.4 kW (10 h.p.)
2
70 mm (2.7560")
82 mm (3.2283")
3
0.63 dm
18.7:1
23—25 kp/cm
Clockwise
12 rev/sec (700 rev/min)
2
4 kp/cm (57 lbf/in
2
0,8 kp/cm (11 lbf/in
Cast iron
70.000—70.019 mm (2.7560—2.7566")
70.500—70.519 mm (2.7755—2.7763")
Light-metal
81 mm (3.19")
51 mm (2.00")
0.086—0.130 mm (0.0034—0.0051")
69.889—69.914 mm (2.7515—2.7525")
70.389—70.414 mm (2.7712—2.7722)
27.9975—28.0025 mm (1.1023—1.1025")
28.0125—28.0225 mm (1.1029—1.1032")
0.010—0.025 mm (0.0004—0.0010")
2
1
0.062—0.113
0.037—0.087
0.037—0.089
0.279—0.406
0.203—0.330
0.350—0.480
Nodular iron
0.08—0.31 mm (0.0031—0.0122")
0.026—0.075
0.026—0.075
35
2 2 1)
(327—355 lbf/in )
2
)
2
)
mm (0.0024—0.0044")
mm (0.0015—0.0034")
mm (0.0015—0.0035")
mm (0.0110—0.0160")
mm (0.0080—0.0130")
mm (0.0140—0.0189")
mm (0.0010—0.0030")
mm (0.0010—0.0030")