Crankcase Ventilation (Ccv) Heater Kit Gm78171-Kp1; Air Cleaner Restrictor Indicator (If Equipped) - Kohler APM402 Operation

3.7 Crankcase Ventilation (CCV) Heater Kit GM78171-KP1

Applies to 125/150 kW, 8.1 L GM-powered and 8.8 L PSI-powered generator set models. Consult your local generator set
distributor/dealer for additional information.
The crankcase ventilation (CCV) heater kit provides a controlled heating source to the crankcase ventilation system preventing
freezing water buildup during cold weather. The thermostat turns on at 4°C (40°F) and turns off at 16°C (60°F) reducing energy
consumption. See Figure 46.
Figure 46 Crankcase Ventilation Heater Kit

3.8 Air Cleaner Restrictor Indicator (if equipped)

The air cleaner restriction gauge mounted on the air cleaner(s) helps determine the air cleaner change interval.
The air cleaner restriction gauge monitors air flow and continuously displays restriction readings indicated as vacuum
(see Figure 47). Increased restriction indicates a clogged air cleaner element.
As maximum allowable restriction is reached, the gauge window turns red indicating the air cleaner element needs replacement.
To reset the gauge, push the gauge top down and release.
Figure 47 Restriction Indicators (styles vary)
TP-6694 9/20
Heater element
AC power cord
Gauge window
Inline connector
Thermostat
Push down to reset
Display
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