Owner manual

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Dual feed line installation instructions

6.6 liter Duramax LB7

Kit includes:

Qty:

1 High pressure fuel line PN# DDF-001

1 High pressure outlet fitting PN# DDF-002

1 Pressure inlet fitting PN# DDF-003

1 Rubber protection hose PN# DDF-004

2 Thermostat sealing o-rings PN# 97300793

5 Plastic zip ties

Summary of content (6 pages)

PAGE 1
Dual feed line installation instructions 6.
PAGE 2
Step 1: Disconnect the ground cables from the two batteries and remove the plastic cover plate from top of engine. Step 2: Remove the air intake tubes from air box, and turbo. Save all parts removed in this step. Disconnect both intercooler tubes from turbo. Note: May be easier to remove both intercooler pipes from engine compartment for better access. Step 3: With all the air-to-air pipes (intercooler tubes) and intake piping out of the way.
PAGE 3
Step6: Remove all fuel lines and fuel line brackets from the injection pump to the junction block assembly. Unbolt the junction block assembly from the mounting bracket and remove the t-block for modification. As seen in (Figures 1-2) (figure 1) (figure 2) Step7: Remove the aluminum intake manifold from both of the cylinder heads by removing the four nuts and bolts holding it to each cylinder head. (figure 3) Set these parts aside for reassembly.
PAGE 4
Remove the pressure spring from the stock plug and press it onto the new high-pressure fitting. (figures 5-6) Using a mirror make sure the checkball is in the pump before installing the pressure fitting. Once you have verified the ball is in the pump you can proceed with installation of the fitting. If the checkball is not in the pump, using white lube/grease, stick it to the end of the pressure valve. Make sure it does not fall off as you install it into the pump.
PAGE 5
Step 10: Remove the pressure relief valve from the junction block and replace with the high-pressure inlet fitting PN# DDF-003. (Figures 11-13) Reinstall the junction block to the engine. Replace all fuel lines to and from junction block to rail and injection pump. (figure 11) (figure 12) (figure 13) Step 11: Route the high-pressure fuel line around the intake and back into the new high-pressure inlet fitting on the junction block.
PAGE 6
Step 13: Reinstall the fan belt, refill the antifreeze (figure 18), hook up the air intake to the turbo, reattach the air filter, Reinstall engine nameplate, and hook up the batteries. Note: Double check all of the connections, fuel lines, and junction block to the injection pump before starting the truck. (figure 18) Thank you for your continued business with Industrial Injection Services. We look forward to working with you in the future.