TECHNICAL DATA
General
Type designation
Effect (DIN) at 40 r/s (2500 r.p.m.)
No. of cylinders
Bore
MD5A
5.5 kW
1
(7.5 b.h.p)
Stroke
84 mm
80 mm
0,443dm
16,5:1
20 - 22kp/cm
Clockwise
(3.31 in.)
(3.15 in.)
(27 cu. in.)
Displacement, total
Compression ratio
Compression pressure at starter motor speed
Direction rotation, viewed from flywheel
Idling speed
3
2
11
(144 - 159 psi)
(550 - 650 r/m)
9,2
- 10,8 r/s
Cylinders
Cylinder liner, wet replaceable
Cylinder diameter, standard mm (in.)
84,000
- 84,015
(3.3071 - 3.3077)
Pistons
Overall height mm (in.)
Height from gudgeon pin centre to piston crown mm (in.)
Piston clearance mm (in.)
Pistons available as standard mm (in.)
77(3,0315)
49,0 - 49,05
0,081 - 0,114
(1.9291 - 1.9311)
(0.0032 - 0.0045)
(3.3032 - 3.3039)
83,901
- 83,919
Gudgeon pins
Diameter mm (in.)
Inner diameter of gudgeon pin bush mm (in.)
Clearance between gudgeon pin and bush mm (in.)
25,996 - 26,000
25,999 - 26,004
(1.0235 - 1.0236)
(1.0236 - 1.0237)
(0.00004 - 0.0003)
0,001
- 0,008
Piston rings
Number of compression rings
Number of oil rings
The upper compression ring has a chromium insert
2
1
Axial piston ring clearance
Upper compression ring mm (in.)
Lower compression ring mm (in.)
Oil scraper ring mm (in.)
0,070 - 0,102
0,050 - 0,082
(0.0028 - 0.0040)
(0.0020 - 0.0032)
(0.0012 - 0.0024)
0,030
- 0,062
Piston ring gap in cylinder
Upper compression ring mm (in.)
Lower compression ring mm (in.)
Oil scraper ring mm (in.)
0,30 - 0,50
0,30 - 0,50
(0.0118 - 0.0197)
(0.0118 - 0.0197)
(0.0098 - 0.0197)
0,25
- 0,50
Crankshaft
Axial clearance (end float) mm (in.)
Main bearings radial clearance mm (in.)
Big end bearing radial clearance mm (in.)
0,05 - 0,30
0,040 - 0,096
(0.0020 - 0.0118)
(0.0016 - 0.0038)
(0.0016 - 0.0038)
0,040
- 0,096
Main bearing journals
Diameter, standard mm (in.)
Diameter, undersized, 0,250 mm (in.) . .
Diameter, undersized, 0,500 mm (in.) . .
53,987 - 54,000
53,737 - 53,750
(2.1255 - 2.1260)
(2.1156 - 2.1161)
(2.1058 - 2.1063)
53,487
- 53,500
Main bearing shells
Thickness, standard mm (in.)
Oversized, 0,250 mm (in.)
Oversized, 0,500 mm (in.)
1,968 - 1,980
2,093 - 2,105
(0.0775 - 0.0780)
(0.0824 - 0.0829)
(0.0873 - 0.0878)
2,218
- 2,230
1)
Measured with a Moto Meter, nipple 884535 and fixture 884543.
30
| Categories | Volvo Penta Manuals |
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| Tags | Volvo Penta MD5A |
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Marine readers have rated Volvo Penta MD5A Marine Diesel Engine Workshop Manual 5.0 out of 5.0 based on 1 product reviews. Very useful download. Thanks VM.