Manitowoc Grove GRT9165, Service Manual

Page: 199 / 302

7-19
GRT9165 SERVICE MANUAL POWER TRAIN
7
Published 10-01-2020 Control # 699-00
GROVE
NOTE: The DEF supply pump will not prime until the
correct SCR temperatures are reached. To verify
that there are no DEF leaks, initiate a manual
regeneration to get the SCR system up to
temperature.
1. If necessary, install the DEF supply pump assembly on
the side of the battery box with attaching hardware (10).
Reconnect hoses as tagged.
2. Connect the batteries by turning the battery switch to
ON.
3. Operate the engine and check for leaks.
WATER COOLING SYSTEM
Description
The cooling system (Figure 7-17) consists of a radiator,
surge tank, engine cooling circuit, and the connecting hoses
and connecting tubes. At all times, the antifreeze/coolant
should be properly inhibited against corrosion. It is
recommended that a mixture of AFC-50/50 blended
ethylene-glycol, low silicate, fully formulated, engine
antifreeze/coolant concentrate and water which does not
require a pre-charge of supplemental coolant additives
(SCA) for use in initial fill of heavy duty liquid cooled internal
combustion engines be used at all times.
The crane is equipped with a cab hot water heater. Hot water
is supplied by the engine coolant system through a strainer
and two port water swivel to the cab heater. The strainer is a
cleanable type and is located on the left side of the
transmission by the rear engine/transmission mount. Refer
to
Maintenance and Lubrication , page 9-1 for service of the
strainer.
Maintenance
General
The cooling system includes the Radiator, Surge Tank,
Thermostat, the Fans, 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
radiator tank. Then the water flows across 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:
1. Burned valves.
2. Pinging or knocking.
3. Excessive fuel consumption.
4. Poor lubrication - increased engine wear.
5. Sticking valves.
6. Short injector life.
7. Engine hot spots.
8. Need for higher grade fuel.
Overcooling
The following engine troubles result when an engine is
overcooled:
1. Excessive fuel consumption.
2. Sludge formation in crankcase.
3. Corrosive acids formed in crankcase.
4. Excessive fuel deposits in the exhaust system.
Antifreeze/Coolant
Heavy duty diesel engines require a balanced mixture of
water and antifreeze/coolant. For maximum rust, freeze, and
boiling point protection, a 50/50 blended, fully formulated
extended life antifreeze/coolant should be maintained at all
times. Refer to
Maintenance and Lubrication , page 9-1. Do
CAUTION
Machine damage hazard!
Do not use the flow test portion of the INSITE™ electronic
service tool Diesel Exhaust Fluid Doser Pump Override
Test to check the system for leaks. This will spray diesel
exhaust fluid into the exhaust system at too low of
temperatures to evaporate, resulting in deposit formations
in the exhaust system.