Freezing Point Of Coolant - Valtra 6000 Workshop Manual

23. Cooling system
Cooling system
1. Coolant pump
2. Thermostat
3. By ---pass passage
4. Radiator
Description
The belt driven, centrifugal type coolant pump is attached at
the front end of the cylinder block and the thermostat housing
is fitted above the pump. The system has an internal coolant
circulation via the by ---pass passage and the circulation is
controlled by a two---way thermostat. With this is achieved an
even warming in all conditions.
The coolant pump has separate ball bearings and the pump
shaft and the bearings are built together to form one unit
(320--- and 420 engines).
The thermostat opens at 79˚C. During a cold season, a ther-
mostat with the opening temperature of 83˚C can be use.
Maintenance
Check the coolant level daily.
The level of the coolant should be slightly above the radiator
core. If the tractor has an expanison tank, see the next page.
Check the condition of the fan belt since it drives the coolant
pump. Stop the engine immediately if the coolant tempera-
ture rises too much.
1. 9. 1992
1. 6. 1999
Caution! Open the radiator cap carefully, if the coolant is hot
as there will be pressure in the system. Carefully turn the radi-
ator cap to the first stop. This will allow the pressure to be
released from system.
N.B! The coolant pump is provided with a drainage hole on
its underside. This hole must not be blocked. If coolant drips
out of the hole, the pump seal is faulty. There may be slight
leakage on a new engine before the pump has been run in.

Freezing point of coolant

Check the freezing point of the coolant at the beginning of the
cold season. If the freezing point is too low, drain off some of
the coolant and top up with anti ---freeze. Run the engine for
a while until the anti ---freeze has been mixed in, then re ---
check the freezing point of the coolant. Drain the cooling sys-
tem completely every second year and refill with new coolant.
Never use just water as a coolant.
Clean regularly the radiator externally from insects and other
impurities.
126
Model Code
6000-- 8750 230
Page
4