Ingersoll-Rand G 270, Users Manual And Maintenance Manual

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31
Coolant. Draining
Before draining the coolant, the engine must be
stopped and the filler cap unscrewed.
WARNING! Except in an emergency, do not
open the engine coolant system filler cap when
the engine is still hot. Steam or hot coolant may
spray out.
Open the drain cocks and remove the drain plugs
(location is shown below). Unscrew and remove the
coolant filter if one is installed.
IMPORTANT! There may be deposits inside
the cocks/plugs. These must be removed.
Check that all the coolant has drained out.
Drain/bleed cocks. Location
4–7 litre engines
Drain cock (K):
– on the left-hand side of the cylinder block, rear
section (Does not apply for engine 420–721.)
Drain plugs (P):
– under the radiator
– beside cyl. 3 (TD/TAD420–721)
– under the coolant pump (Does not apply for 420–
721)
– under the oil cooler
– 2 (at front and rear) on the air compressor, if in-
stalled (accessory) (Does not apply for 420–721)
– remove bottom radiator hose (Does not apply for
420–721)
Bleed cock (1):
– The engines are self-airing. Therefore they have
no vent cock. (Does not apply for 420–721)
– On the coolant pump (TD/TAD420–721)
Maintenance
TD/TAD420–721