Grove Published 01-29-2015, Control # 512-01 7-21
TMS700E SERVICE MANUAL POWER TRAIN
WATER COOLING SYSTEM
Description
The cooling system consists of the radiator, coolant recovery
tank, engine cooling circuit, and the connecting hoses.
Cooling system capacity is approximately 37.9 liters (52
quarts). The temperature is controlled by a 83°C (181°F)
thermostat located between the top of the engine and the top
of the radiator. At all times, the antifreeze/coolant should be
properly inhibited against corrosion. It is recommended that
a 50/50 fully formulated antifreeze coolant be used at all
times.
The radiator assembly consists of the engine water cooler,
charge air cooler, and the shroud.
A radiator coolant level switch is installed in the top portion of
the radiator. Coolant level high/low signals are supplied to
the engine ECM.
The crane is equipped with cab hot water heaters. Hot water
is supplied by the engine coolant system through cable
operated shutoff valves to each heater. The hot water to the
superstructure heater also passes through a strainer and two
port water swivel. The strainer is a cleanable type and is
located on the right side of the carrier frame at the front
corner of hydraulic reservoir. Refer to Lubrication, page 9-1
for service of the strainer.
Maintenance
General
The cooling system includes the radiator, coolant recovery
tank, thermostat, the fan, and water pump. Radiator hoses
are also included in this group.
The cooling system is often neglected because the effects or
damage that result from an improperly maintained system
usually occur gradually. The cooling system needs to be
maintained with the same attention as other systems.
The circulation of water through the cooling system relies
entirely upon the water pump. The water pump draws water
from the radiator and forces it through the water jacket and
cylinder head. There it accumulates heat and flows to the top
radiator tank. Then the water flows down through the radiator
core and is cooled by air from the fan. This process of
removing heat from water as it circulates holds the engine to
its efficient operating temperature.
The following paragraphs point out several facts about
cooling system components, the effects of cooling system
neglect, and procedures to be followed for cooling system
maintenance.
Effects Of Cooling System Neglect
Whenever an engine does not perform at top efficiency, a
neglected cooling system may be at fault even though the
part directly responsible is not a part of the cooling system.
Most of these problems can be traced to overheating;
however, an engine that is running too cold can be just as
troublesome.
Overheating
An engine that is overheating may lead to troubles such as
the following:
• Burned valves.
• Pinging or knocking.
• Excessive fuel consumption.
• Poor lubrication - increased engine wear.
• Sticking valves.
• Short injector life.
• Engine hot spots.
• Need for higher grade fuel.
Overcooling
The following engine troubles result when an engine is
overcooled:
• Excessive fuel consumption.
• Sludge formation in crankcase.
• Corrosive acids formed in crankcase.
• Excessive fuel deposits in the exhaust system.
Rust Prevention
To keep engines operating at newness efficiency, all forms of
rust formation must be prevented. The formation of rust in
the cooling system is a result of the interaction of water, iron,
and oxygen, and can only be prevented by maintaining full
strength corrosion protection at all times.
For maximum rust, freeze, and boiling point protection, a 50/
50 blended, fully formulated extended life antifreeze/coolant
should be maintained at all times. Failure to use and
maintain the fully formulated coolant will increase
maintenance needs.
Engine Antifreeze/Coolant Fill Procedure (when level
is low)
1. Fill the system with a 50/50 blended, fully formulated
extended life antifreeze/coolant. Fill to the bottom of the
surge tank filler neck. Fill slowly. Flow exceeding
19 l/min (5 gpm) can give a false reading.
NOTE: If the engine coolant is changed, the coolant filter
must also be changed.
2. Wait one minute and recheck the antifreeze/coolant
level. Refill as necessary repeating step 1.
Reference Only
To Next Page
Loading...
Need help?
General
