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N14 Base Engine Troubleshooting and Repair Manual – 005-026   Fuel Pump Gear Pump Check Valve

Table of Contents

Remove
Install

Remove

 TOC

If the check valve in the gear pump return elbow stays open or closed, replace the elbow.

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NOTE: Check the elbow threads. Do not install an elbow that has straight machine threads in a hole that has a pipe tap thread. A gear pump that has a straight thread will have a 19 mm [0.750 inch] spotface in the valve area. A gear pump that has a pipe tap thread will have a 16 mm [0.625 inch] spotface or no spotface.

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Remove the drain line.

Remove the check valve elbow.

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Install

 TOC

Install the check valve elbow.

  • If the check valve elbow has machine threads to the maximum thread depth, turn the elbow out until it is pointed toward the drain line. Tighten the jam nut.
Torque Value:  6  n.m  [50 in-lb]
  • If the check valve has a pipe thread, install the elbow until it is tight and pointed toward the drain line.

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Install the drain line.

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Last Modified:  12-May-2003
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