Volvo MD5A, Workshop Manual

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