Operation and maintenance manual

Section 200-0040

SM 1398 Rev 1 2-00

4. If the fuel flow is insufficient for satisfactory engine

performance then proceed as follows:

a. Replace the primary and secondary fuel filters, as

described under 'Maintenance'. Start the engine and run

it at maximum rev/min and recheck the fuel flow. If fuel

flow is still unsatisfactory, perform step 'b'.

b. Check the fuel lines for restrictions due to pinching,

kinking or other damage. Be sure the correct restricted

fitting is installed at the return port of the fuel tank. If no

problem is found, substitute another fuel pump that is

known to be operating correctly and recheck the fuel flow.

When changing the fuel pump, inspect the fuel pump drive

assembly, hubs and coupling. Clean all fuel lines with

compressed air and be sure all fuel connections are tight.

c. Disconnect the fuel lines from the ECM cooling plate

and, using a suitable connector, connect the two fuel

lines, bypassing the cooling plate. Run the engine at

maximum rev/min and recheck the fuel flow. If the fuel

flow with the cooling plate bypassed is normal, the

cooling plate should be replaced.

SPECIAL TOOLS

There are no special tools required for procedures

outlined in this section. Refer to Section 300-0070,

SERVICE TOOLS, for part numbers of general service

tools required. These tools are available from your

dealer.

Fuel System - Fuel System

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