Engine Cooling System Maintenance; Bleeding The Fuel System - Nortrac 35XT Owner's Manual

4.20 Engine Cooling System Maintenance

The engine cooling system uses a 50/50 water/antifreeze blend.
In general the antifreeze is good for a period of 2 years or 1,600
hours. After that the coolant should be replaced. The cooling
system should be flushed out before new coolant is added. Use
clean water for the flushing process.
Close the radiator drain valve, add a 50/50 water/antifreeze
mixture and run the engine for 20 minutes. Then shut off the
engine, let it cool down, and check for leaks and for the correct
coolant level
IMPORTANT ISSUES:
Always use antifreeze in the radiator.

4.21 Bleeding the Fuel System

•
If the tractor is not used for a long time, or when the
diesel filter element is replaced, or the fuel tank is kept
empty, air could enter the fuel line, making it difficult
to start the engine. This problem can be fixed by
following the steps below but first the fuel tank should
be filled and the fuel cutoff switch turned on.
•
Unscrew the bleeder screw (A) on the fuel filter, and
then move the fuel supply pump draw knob (C) up and
down until there are no air bubbles in the diesel fuel
flowing out from the bleeder screw.
•
Tighten the fuel filter bleeder screw (A), and unscrew
the air bleed screw (B) on the fuel injection pump.
Pump the fuel supply hand primer knob (B) until the
there are no air bubbles in the diesel fuel flowing out
of the bleeder screw. Then tighten the fuel filter
bleeder screw (C).
IMPORTANT ISSUES:
Generally, 2 light diesel oil should be used in summer, and 1 light diesel oil should be used in winter.
Maintenance Instructions
During winter, water in the radiator can freeze, causing the engine block to crack.
The engine runs on high quality light diesel oil and must meet specifications.
Figure 4-20
Maintenance
Figure 4-24 Exhaust of Fuel System
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Cooling System