Manitowoc Grove TMS800E Service And Maintenance Manual page 257

TMS800E SERVICE MANUAL
3. Place a clean drain pan to catch the overflow, and use it
to maintain the level in the radiator. Do not spill the
solution on the vehicle paint.
4. Replace the radiator cap and run the engine at moderate
speed, covering the radiator if necessary, so the system
reaches a temperature of 82°C (180°F) or above, but
does not reach the boiling point. Allow the engine to run
at least two hours, or according to recommendations of
the manufacturer of the cleaning compound, at 82°C
(180°F) so the cleaning solution may take effect. Do not
drive the vehicle or allow the liquid level in the radiator to
drop low enough to reduce circulation.
5. Stop the engine as often as necessary to prevent boiling.
6. With the engine stopped, cautiously feel the radiator
core with bare hands to check for cold spots, and then
observe the temperature gauge reading. When there is
no change in temperature for some time, drain the
cleaning solution.
7. If clogging of the core is relieved but not fully corrected,
allow the engine to cool, pressure-flush the system (see
Pressure Flushing) and repeat the cleaning operation.
8. If problem persists, replace radiator.
Pressure Flushing
1. Disconnect both radiator hoses that connect the radiator
to the engine.
2. Clamp a convenient length of hose to the radiator core
outlet opening, and attach another suitable length of
hose to the radiator inlet opening to carry away the
flushing stream.
3. Connect the flushing gun to compressed air and water
pressure, and clamp the gun nozzle to the hose
attached to the radiator outlet opening.
4. Fill the core with water. Turn on air pressure in short
blasts to prevent core damage.
5. Continue filling the radiator with water and applying air
pressure as above until the water comes out clear.
6. Clamp the flushing gun nozzle firmly to a hose attached
securely to the engine water outlet opening. Fill the
engine block with water, partly covering the water inlet
opening to permit complete filling.
7. Turn on compressed air to blow out water and loose
sediment. Continue filling with water and blowing out
with air until flushing stream comes out clear.
8. For badly clogged water jackets that do not respond to
regular pressure flushing, remove the engine cylinder
head and core hole plugs, and with a suitable length of
small copper tubing attached to the flushing gun nozzle,
flush the water jackets through the openings.
GROVE
9. Flush the heaters following the same procedure as for
the radiator core.
10. After completing the flushing operation, clean out the
surge tank overflow pipe; inspect the water pump; clean
the thermostat and the radiator cap control valves.
Check the thermostat for proper operation before
installation.
11. Blow insects and dirt from the radiator core air
passages, using water, if necessary, to soften
obstructions.
Component Inspection
Radiator/Recovery Tank
1. Side Tanks - Look for leaks, particularly where the tank is
soldered to the core. Vibration and pulsation from
pressure can fatigue soldered seams.
2. Filler Neck - The sealing seat must be smooth and
clean. Cams on filler neck must not be bent or worn so
as to allow a loose fitting cap. Ensure the overflow tube
is not plugged.
3. Radiator Cap - This is the pressure-setting type. Its
purpose is to hold the cooling system under a slight
pressure, increasing the boiling point of the cooling
solution and preventing loss of solution due to
evaporation and overflow.
The cap has a spring-loaded valve, the seat of which is
below the overflow pipe in the filler neck. This prevents the
escape of air or liquid while the cap is in position. When the
cooling system pressure reaches a predetermined point, the
cap valve opens and will again close when the pressure falls
below the predetermined point.
When removing the pressure type cap, perform the
operation in two steps. Loosening the cap to its first notch
raises the valve from the gasket and releases the pressure
through the overflow pipe. In the first stage position of the
cap, it should be possible to depress the cap approximately 3
mm (0.13 in). The prongs on the cap can be bent to adjust
this condition. Care must be taken that the cap is not too
loose as this would prevent proper sealing.
Loosen cap slowly to the first detent to relieve pressure,
then pause a moment to avoid possible burning by hot
water or steam. Continue to turn the cap to the left until it
can be removed.
4. Tubes are very small and can become easily clogged by
rust and scale. The general condition of the cooling
system and operating temperature are indications as to
Published 01-29-2014, Control # 496-00
POWER TRAIN
CAUTION
7
7-25