1. Basic aim of preparing this resentation
was to update all employees mainly
operators who are practically involved
in engine operations on site or while
mobilising the cranes ,also covering
reasons,why the engine of LTM 1140
crane seized while being mobilize from
Delhi to Rajasthan in the month of Mar

2. ENGINES:-
This is a typical Mercedez Benz engine
fitted on maximum no of cranes

3. Basic Information on an
engine

4. While the crane was being
mobilized from Delhi and had just
completed 100 kms of running, the
high engine water temp indication
showed maximum,and engine
seized.

5. Following can be the reasons for high cooling
water temperature:-
1. Overheating of cooling water.
2. Less water in cooling tank/Radiator.
3. Radiator fan not working.
4. No coolant in water.
5. Thermostat malfunction.
6. Cooling water pump not working.

6. Now it can be seen from
the working model, how
much of heat will be
created due to friction all
around the engine and
especially around wall of
the piston and surrounding
areas.
The Nos.1,2,3,4 are
indicating
suction,compression,power
and exhaust strokes.

7. If this heat is not removed on
continuous basis it can damage
following…..
PISTON

8. LINNER
(In which piston moves up and down and
shown in red is the crankshaft which holds
pistons with the help of connecting rods)

9. In this case both piston and
cylinder are damaged

10. Line Diagram showing cooling water flow in Engine
Thermostat
Radiator Water flow
Cylinder Head Water jacket
inside
engine body
Exhaust
Cylinder Block Oil cooler
Piston
Water Pump
Oil Sump

11. After the engine was opened in
workshop it was noticed that the
water cavities were also rusted
because there was no coolant in
water,photos are shown in next
slide marked with red circle…

12. Cooling water cavities in cylinder
head
Water pump casing Water Pump

13. Importance of coolant in cooling
water:-
1. It has additives in it which does not
allow the corrosion to take place.
2. It has a property of keeping the
cooling water temp low by few degrees
than normal water.

14. DAILY CHECKS ON AN ENGINE:-
1. Check radiator water filling cover should be tight.
2. Check water level in radiator ,It should be full.
3. Check color of water for coolant/additives.
4. Check water should not be dirty.
5. Check engine oil level on dip stick.
6. Check engine visually for any leaks of
water,fuel,oil.
7. Check tightness of all belts.
8. Hand turn the engine for checking the free ness.

15. 9. Check water level in battery.
10. Check oil level in reservoir.
11. Check tyre pressure.
12. Check condition of all hoses.
13. Start the engine and then check for
any leaks.
14. Check color of the exhaust it should
not be black or white,it should be color
less.

16. NORMAL RUNNING PARAMETERS OF AN ENGINE:-
1. Fresh water temperature: 40 to 80 degree
centigrade
2. Lub oil temperature 40 to 80 degree centigrade
3. Lub oil pressure 2 to 4 kg
Maximum Alarming Temperatures:-
1. Fresh water temperature: 90 degree centigrade
2. Lub oil temperature 95 degree centigrade
3. Lub oil pressure 2 kg Minimum

17. Thanks &
wish you all safe engineering
practice's