Install Manual

TP-6906 6/14 35Section 1 Installation Instructions
1.7 Cooling System
Hot coolant and steam.
Can cause severe injury or death.
Before removing the pressure cap,
stop the generator set and allow it to
cool. Then loosen the pressure cap
to relieve pressure.
WARNING
The generator set is equipped with a unit-mounted
radiator common cooling system. Add cooloant before
starting the generator set.
The system’s major components include two electric
fans, a circulating water pump, a radiator, and a
thermostat. The pump circulates water through the
engine until it reaches operating temperature. Then the
engine thermostat opens, allowing water circulation
through the radiator. The thermostat restricts water flow
as necessary to prevent overcooling. The fans blow air
through the radiator across the cooling surface.
On model 30RCLH only, an oil cooler provides
additional cooling and is located at the bottom of the
radiator. As engine oil passes through the oil cooler,
coolant from the r adiator circulates around the oil cooler
removing heat (oil cooler is not available on model
24RCL).
Follow the instructions below to fill the cooling system.
1. Close the radiator’s coolant drain valve and tighten
the hose clamps.
Note: Do not add coolant to a hot engine. Adding
coolant to a hot engine can cause the
cylinder block or cylinder head to crack. Wait
until the engine has cooled.
2. Fill the radiator with the recommended coolant
mixture of 50% ethylene glycol-based long-life
coolant and 50% clean, softened water to inhibit
rust/corrosion and prevent freezing. See
Figure 1-23 for coolant capacity and Figure 1-24
for coolant fill location. Do not replace the pressure
cap at this time.
Note: A coolant solution of 50% ethylene glycol
provides freezing protection to --37C
(--34F) and overheating protection to
149C (300F). A coolant solution with less
than 50% ethylene glycol may not provide
adequate freezing and overheating
protection. A coolant solution with more than
50% ethylene glycol can cause engine or
component damage. Do not mix long-life
coolant and conventional coolants. Do not
use alcohol or methanol antifreeze or mix
them with the specified coolant.
3. Check the oil level before operating the engine.
4. Operate the engine with the radiator’s pressure
cap removed until the thermostat opens and the
radiator upper hose becomes hot.
5. Stop the engine and allow it to cool.