Clean Radiator Fins And Inspect Hoses; Engine Thermostat - Kohler 38RCL Manual

4.2 Clean Radiator Fins and
Inspect Hoses
To prevent generator set from shutting down or
becoming damaged due to overheating, keep the
cooling air inlets clean and unobstructed at all times.
Inspect the exterior of the radiator for obstructions;
remove all dirt and foreign material with a soft brush or
cloth (to avoid damaging radiator fins). Check all hoses
and connections for leaks and replace any hoses that
are cracked, frayed, or feel spongy. When coolant level
checks are made, check the condition of the radiator cap
rubber seal; replace if cracked or deteriorating. Remove
dirt and other debris from the radiator cap and filler neck.

4.3 Engine Thermostat

See Figure 4-1 for the location of the engine thermostat.
The thermostat rating is shown in Figure 4-2. Refer to
the engine service manual for thermostat and water
pump service information.
1. Radiator
2. Radiator fill/pressure cap
3. Upper radiator hose
4. Engine compartment
temperature sensor
5. Engine compartment fan
6. Lower radiator hose
7. Coolant overflow bottle
8. Coolant overflow tube
9. Low coolant level sensor
10. Radiator fans
Figure 4-3 Cooling System Components
54 Section 4 Cooling System
1. Thermostat
Figure 4-1 Thermostat Location on the Engine
Item
Thermostat
Figure 4-2 Thermostat Rating
1
2 3
4
7
(48RCL shown)
71_C (160_F)
5
10
6
1
TP-6812
Rating
8
9
GM83070
TP-6811 7/16