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Centinel System – Repair Manual – 006-012   Fuel Drain Line Restriction

Table of Contents

Measure

Measure

 TOC

Remove the fuel drain hose and install adapter, Part Number ST-434-1.

Install a 0-763 mm-Hg [0-30 in Hg] pressure gauge onto the adapter.

Operate the engine at high idle and no load. Check and record the restriction reading.

Fuel Drain Line Restriction

mm-hg in-hg
With Check Valve   165 MAX 6.5
Without Check Valve   229 MAX 9

If restriction exceeds specifications, inspect the drain lines for the cause of the restriction. Fuel coolers and fuel heaters can cause excessive drain line restriction. Excessive restriction can cause low power and poor fuel economy.

Remove the adapter and pressure gauge. Install the fuel drain hose.

Torque Value:  35  n.m  [26 ft-lb]

If damage resulted in coolant, oil, excessive fuel or excessive black smoke entering the exhaust system, the aftertreatment system must be inspected. Refer to Procedure 014-013 in Section 14.

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Last Modified:  18-Feb-2010
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