Iran Tractor ITM 470, Инструкция для оператора

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4
Maintenance and adjustment
76
Coolant
Check the radiator coolant level —
Flexible maintenance.
DO NOT use an anti-freeze solution for
more than two years (or 2000 hours) of
operation. The heat generated by the die-
sel engine causes a natural change in the
inhibitors in the coolant which results in
loss of corrosion protection. The loss of
the inhibitors may cause water pump cavi-
tation and cylinder block erosion.
1. To check the coolant level first remove
the radiator cap slowly to allow pres-
sure to escape. DO NOT add cold cool-
ant to a hot system.
2. The coolant level must be maintained
at 25 mm (1 in) below the filler neck.
Top up with anti-freeze solution of the
correct strength.
Drain the cooling system every 1000
hours or two years whichever is the
sooner.
1. To drain the cooling system remove
the radiator cap slowly to allow any
pressure to escape.
2. Remove the drain plug at the bottom of
the radiator (Fig. 28).
3. Remove the the drain plug from the
cylinder block (Fig. 29). Make sure
that the drain points DO NOT become
blocked during draining.
Fig. 28: Radiator drain tap.
Fig. 29:
4. If the old coolant is very dirty, flush
out the system with clean water.
5. Replace the plugs and reconnect the
hose if removed. Refill the radiator
with clean rain water, if available, with
a minimum of 33 per cent anti-freeze
solution.
6. Run the engine for approximately five
minutes to remove all air from the
system. Check the coolant level and
add coolant if needed. Check the hos-
es, radiator, pump and heat exchanger
for leaks.
NOTE
It is advisable to use ITMCo. advised
anti-freeze, it contains inhibitors to
protect your engine.
Frost precautions (Cold climate)
Anti-freeze solutions must be added to
the cooling system water. Use ITMCO. ad-
vised Anti-freeze, available from your IT-
MCO. local Dealer, who will advise you of
the correct proportions of anti-freeze mix-
ture to suit your climatic conditions. The
dry ice point in the following Table 1 can be
regarded as the safe limit temperature for