Valtra 6550 - Specifications

124
Model Code Page
23. Cooling system
1. 8. 2000
6000--8950 230 2
1. 8. 1998
Specifications
Coolant pump (320, 420 engines), ---K6490.
Outside diameter of bearing 38,087...38,100 mm.......................................................
Inside diameter of bearing housing in pump body 38,058...38,083 mm....................................
Shaft diameter 15,910...15,920 mm..................................................................
Impeller hole diameter 15,881...15,899 mm............................................................
Diameter of the seal recess in the pump body 36,450...36,489 mm........................................
Theimpellerispressedontotheshaftuntilthedistancebetweentherearfaceofimpeller
and the rear face of the pump body is 1,8---2,2 mm...............................................
Distance of belt pulley from rear face of body:
--- 320DS; ---E7535, 420D/DS; ---E7054 178,3...178,7 mm..............................................
--- 320DS; E7536---, 420D/DS; E7055---. 174,4---174,6 mm.............................................
Fan guide diameter 25,00...25,20 mm..............................................................
Balancing precision of fan 0,3 Ncm max.........................................................
Max. permissible eccentricity of fan ±0,3 mm.................................................
Belt deflection 15...20 mm...................................................................
Coolant pump (620/634 engines)
Outside diameter of bearing 52 mm.......................................................
Inside diameter of bearing housing in pump body 51,979...52,009 mm....................................
Shaft diameter at bearing 19,980...19,993 mm.........................................................
Shaft diameter at impeller 15,907...15,920 m.........................................................
Impeller hole diameter 15,881...15,899 mm............................................................
Diameter of the seal recess in the pump body 36,450...36,489 mm........................................
Distance between impeller and rear face of pump body 0,8---1,2 mm................................
Balancing precision of fan 0,3 Ncm max (30 pcm).........................................................
Belt deflection 15...20 mm...................................................................
Fan diameter
--- 6000---6600 483 mm...................................................................
--- 6800, 6900 508 mm...................................................................
--- 8000---8100 (later models) 508 mm (533 mm)......................................................
--- 8200/8400 (later models) 533 mm (585 mm).......................................................
--- 8050 533 mm.........................................................................
--- 8150 585 mm.........................................................................
--- On 8450---8750 the coo ling fan is fitted on the viscous coupling.
8200, 8050 and 8150 has 8 cooling fan blades, other models 6 blades.
Thermostat
Spare part number Type Opening Fully Max stroke
begins at open at mm
8361 15646 (6000---8400) ø67/79˚C79˚±2˚C94˚C8
8361 15718 (6000---8400) ø67/83˚C83˚±2˚C97˚C8
8360 15156 (8050---8750) ø54/79˚C79˚±2˚C94˚C7,5
8363 31590 (8050---8750) ø67/83˚C83˚±2˚C95˚C8
Tightening torque
Coolant pump belt pulley nut 120 Nm......................................................
Fan attaching bolts 30 Nm...............................................................