Valtra 6550 - Expansion Tank; Emptying the System in Connection with Repairs

29
Model Code Page
23. Cooling system
1. 8. 2000
6200--8950 230 5
1. 9. 2002
Expansion tank
A
A
3
4
5
1
6200---6800 (K41106 ---)
6250---6850
Picture 2. Cooling system on 8200 ---8400 tractors from ser.
no. 668118 and on 8050 ---8750 tractors and on HiTech
tractors 6550 ---8950. On the latest 4 ---cyl. tractors
6200 ---6800 and 6250Hi ---6850Hi the expansion tank has a
different shape (same as on 100 ---series tractors)
1. Expansion tank (volume 4 l ). Earlier tractors had metallic
and later plastic expansion tank.
2. Breather hose (metallic tank)
3. Filling hose
4. Outlet hose
5. Connection hose to radiator
Emptying the system in co nnection with repairs:
--- carefully open the expansion tank cap
--- empty the radiator t hrough the emptying tap (if not the
tap, disconnect the lower water hose)
--- unscrew the cylinder block emptying plug
--- open the oil cooler emptying plug (if fitted)
--- open the cab heater adjusting knob
--- empty the intercooler via the plug (if fitted)
Filling the system in connection with repairs: First fill
the radiator and after that the expansion tank. The coolant
level should be to the height of 1/3 of the level indication
hose length (metall i c tank) or in the latest tractors (plastic
tank) the cool ant level must s tand at the expansion t ank
level marking (black arrow in the picture above), when cool-
ant is cold.
The level of hot coolant is upper. Before filling the expan-
sion tank, unscrew the bleeding plug on the RH side of the
thermost at housing, until no air flows out.
Checking the coolant level: The system has enough cool-
ant, if the coolant can be seen in the level indicator hose
(metalli c expansion tank) or i n the plastic tank the coolant
level surface stands at the mark line o n the tank.
Note! The front cover has perforations to improve air flow
through the radiator.
Warning! Do not open the radiator filling cap, if the coolant
is hot. All maintenance works of the coolant system should
be made through the expansion tank filler cap.
Important! If the co o l ing system has been emptied, check
the restriction holes in the thermostat housing and in hose
union A (see picture above) so that they are not blocked.
Clean if needed.
From engine number F5239 (8450---8750) and F6150
(8200, 8400) incl, the restriction hole in the hose union A
has been changed from ø 3
+1
mmtoø2
±0,2
mm. If the
expansion tank foams over, the new restrictio n must be
fitted onto the earlier manufactured tractors.