Figure 4-10. Fuel filter service.
is drawn from the bottom of the radiator by the
Drycleaning solvent, P-D-680, used to
water pump. During the warm-up period, when
clean parts is potentially dangerous to
coolant temperature is below normal, the coolant is
personnel and property. Do not use near
restricted by the thermostat. A bypass tube con-
open flame or excessive heat. Flash point
netted between the thermostat housing and the
of solvent is 138°F.
water pump provides circulation within the engine.
As the coolant temperature rises above 160° to 170°
F., the thermostat valve opens, restricting the
The diesel engine is cooled by circulating the engine
bypass system, and coolant is circulated through
coolant through the radiator, transmission heat
the radiator. This section contains information for
exchanger, engine block, and cylinder head. Coolant