Manitowoc 2250 Service And Maintenance Manual

Reference Only
Manitowoc Published 11-06-15, Control # 040-13 7-17
2250 SERVICE/MAINTENANCE MANUAL POWER TRAIN
7
ENGINE COOLING SYSTEM FILL —
CURRENT PRODUCTION TIER 4
General
The cooling system consists of a horizontal radiator
(mounted above the engine) and a variable-speed,
hydraulically driven blower-type fan.
Cooling System Operation
Cooling system flow is illustrated in Figure 7-16.
The cooling system is of the deaeration type, which
continually removes air from the system, as follows:
• A small percentage of total coolant flow is circulated
through a vent line to the radiator.
• Since coolant circulation is very slow in the radiator, air
separates from the coolant.
• Air collects at the top of the radiator. When pressure
rises to 16 psi (1,03 bar), relief in fill cap opens to
exhaust air through overflow line.
• Deaerated coolant returns to the system through a
make-up line.
Maintenance
Daily Maintenance (Start of Each Shift)
Check coolant level when cold (see Figure 7-17):
1. Coolant should be at full level of cold gauge.
2. Fill cooling system as required with coolant. To ensure
adequate fill, do not add coolant at a rate greater than
5 gallons/minute (18.9 liters/minute).
See engine manufacturer’s manual for antifreeze and
coolant additive recommendations.
3. Look for coolant leaks while engine is running and
correct if found.
Semiannual Checks
1. Inspect fill cap and thermostat for proper operation and
replace worn parts:
- Fill cap relieves at 16 psi (1,03 bar)
- Thermostat closes at 180°F (82°C) and opens fully
at 202°F (94°C)
2. Inspect water pump belts for wear and proper
adjustment (see engine manufacturer’s manual).
3. Inspect cooling system hoses for deterioration and other
defects. Replace as necessary.
4. Tighten hose clamps.
5. Clean all dirt and other debris from outside of radiator.
6. Check that overflow line on tank is open.
Draining Radiator
Drain radiator system, as follows:
1. Stop engine.
2. Remove covers over three bleed valves — two at front
end of radiator and one at back end (see Figure 7-20
and Figure 7-21).
3. Open three petcock bleed valves located at both ends of
radiator under access covers.
4. Remove radiator surge tank fill cap (Figure 7-17
).
WARNING
Burn Hazard!
Avoid personal injury from heated coolant spray or steam
— do not remove radiator cap from hot engine. Stop
engine and wait until coolant temperature is below 120°F
(50°C). Then:
• Place a protective covering over fill cap.
• Slowly turn fill cap counterclockwise until it stops at
safety detent.
• Wait until pressure (indicated by hissing sound) is
completely relieved.
• Depress fill cap and turn counterclockwise to remove.
CAUTION
Overheating Hazard!
Avoid engine damage from overheating — do not allow
coolant level to go below low level on gauge.
FIGURE 7-20
Front of Radiator
Access
Cover
Bleed Valve
(3 places under covers)
Radiator Surge
Tank Fill cap

Manitowoc 2250 Specifications

General

Brand	Manitowoc
Model	2250
Category	Construction Equipment
Language	English