89
4.4 Cooling system
Maintenance
Cooling system
A transparent radiator auxiliary tank
is fitted between cabin rear wall and
load body on LPT 613 vehicles. On
LP 613 this is fitted behind driver
seat. Maximum & minimum levels
indicated on the body. It is fitted
with two identical caps with
pressure cum vacuum relief valve
having 0.5 bar pressure setting.
Always top up coolant only through
filler neck. Top cap should not be
disturbed.
Procedure for filling when the
system is empty.
1.
Ensure no water in vent pipes,
drain vent pipes while draining/
refilling.
2.
Fill coolant mixture through
auxiliary tank filler neck.
3.
Run engine for a few minutes
and top up coolant mixture, if
required.
Add recommended coolant to
water in ratio 1:1. If coolant starts
boiling, it may be on account of :
i.
Less coolant or dirt/scale having
accumulated inside coolant
passages, especially in radiator
core.
ii.
Choking of radiator air passages
due to foreign material or
damaged radiator fins.
iii. Loss of coolant by evaporation
and leakage through defective
auxiliary tank caps.
iv.
Loose water pump drive belt.
v.
Coolant leakage.
Radiator drain plug
Radiator auxiliary tank filler neck
(LPT)
Radiator auxiliary tank filler neck (LP)
