7
1. 9. 2002
8450--8950 210 3B
1. 8. 2000
Model Code Page
21. Engine
Specifications
Tractor 8450 8450E 8450 8450 Hi 8550 8550E 8550
(---L24134) (L24135---) (---L24115) (L24116---)
Designation 620 DWR 620 DWR 620 DWRE 620DWRE 634 DSR 634 DSR 634DSRE
Turbocharger yes yes yes yes yes yes yes
Noofcylinders6666666
Displacement (litres) 6,6 6,6 6,6 6,6 7,4 7,4 7,4
Cyl. bore (mm) 108 108 108 108 108 108 108
Stroke (mm) 120 120 120 120 134 134 134
Compr. ratio 16,5:1 16,5:1 16,5:1 16,5:1 16,5:1 16,5:1 16,5:1
Output (kW/r/min DIN) 103/2200 103/2200 103/2200 103/2200 118/2200 118/2200 118/2200
Torque (Nm/r/min DIN) 580/1450 580/1450 615/1400 615/1400 650/1450 650/1450 650/1400
Momentrise%30303838272727
Low idling (r/min) 750 750 750 750 750 750 750
Compr. press
1
) (bar) 24 24 24 24 24 24 24
Max. no--load revs (r/min) 2400 2400 2400 2400 2400 2400 2400
Tractor 8550 Hi 8750 8750E 8950 Hi
(---J32215)
Designation 634DSRE 634 DS 634 DS 634 DSBIE
Turbocharger yes yes yes yes (+interc..)
No of cylinders 6 6 6 6
Displacement (litres) 7,4 7,4 7,4 7,4
Cyl. bore (mm) 108 108 108 108
Stroke (mm) 134 134 134 134
Compr. ratio 16,5:1 16,5:1 16,5:1 16,5:1
Output (kW/r/min DIN) 118/2200 118/140/2200 118/140/2200 118/147/2200
Torque (Nm/r/min DIN) 650/1400 650/1450 650/1450 650/820/1400
Moment rise % 27 27 27 27/28
Low idling (r/min) 750 750 750 750
Compr. press
1
) (bar) 24 24 24 24
Max. no--load revs (r/min) 2400 2400 2400 2400
1
) Minimum value at operating temperature and starting revs. Max permitted difference between cylinders 3,0 bar.
E = AC---4, Control system for tractor.
Hi =HiTech.
Valves, rockers and tappets
With a valve clearance of 1,0 mm:
--- i n l e t v a lv e ope n s 0˚±2˚ B.T.D.C...............................................................
--- i n l e t v a lv e clos e s 16˚±2˚ A.B.D.C..............................................................
--- exhaust valve opens 39˚±2˚ B.B.D.C...........................................................
--- exhaust valve c loses 1˚±2˚ A.T.D.C...........................................................
V alve clearance cold and hot:
--- i n l e t v a lv e 0,35 mm....................................................................
--- exhaust valve 0,35 mm.................................................................
Angle of valve seat in cylinder head:
--- i n l e t v a lv e 35˚+20’....................................................................
--- exhaust valve 45˚+20’.................................................................
Width of valve seat in cylinder head:
--- i n l e t v a lv e 2,9...3,7 mm....................................................................
--- exhaust valve 1,3...2,3 mm.................................................................
Angle of valve face:
--- i n l e t v a lv e 35˚--- 20’....................................................................
--- exhaust valve 45˚--- 20’.................................................................
Outside diameter of valve head:
--- i n l e t v a lv e 48 mm....................................................................
--- exhaust valve 41 mm.................................................................
Max valve movement:
--- i n l e t v a lv e 10,9 mm....................................................................
--- exhaust valve 12,1 mm.................................................................
Inlet valve stem diameter 8,960...8,975 mm..........................................................
Exhaust valve stem diameter 8,925...8,940 mm......................................................
Inlet valve stem clearance 0,025...0,055 mm.........................................................
--- R e j ec t li m i t 0,30 mm...................................................................
Exhaust valve stem clearance 0,060...0,090 mm......................................................
--- R e j ec t li m i t 0,35 mm...................................................................
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