Section 10 Chapter 13 - dmcpubs.com

1 Section 10 Chapter 137-89421NH24 Valve, Liter EngineInjectors and Fuel LinesNote: All coding used in the Liter and 9 Liter engine manuals are Cummins engine codes. These engine codes have no meaning to New Holland warranty codes and should only be used for procedure Valve, Liter EngineInjectors and Fuel Lines Page a7-89421 NHSection 10 Chapter 13 Issued 8-2001 Injectors and Fuel LinesContentsAir in Fuel (006-003).. 3 Measure (006-003-010) .. 3 Test (006-003-012) .. 3 Fuel Connector (Head Mounted) (006-052) .. 22 Inspect for Reuse (006-051-007) .. 22 Install (006-052-026) .. 22 Remove (006-052-002) .. 22 Fuel Drain Line Restriction (006-012) .. 5 Measure (006-012) .. 5 Fuel Drain Lines (006-013) .. 6 Remove (006-013-002) .. 6 Initial Check (006-013-001) .. 6 Inspect for Reuse (006-013-007) .. 7 Install (006-013-026) .. 7 Fuel Filter (Spin-On Type) (006-015) .. 8 Remove (006-015-002) .. 8 Install (006-015-026) .. 8 Fuel Filter Head Bracket (006-018).

2 10 Assemble (006-018-025) .. 11 Disassemble (006-018-003) .. 10 Inspect for Reuse (006-018-007) .. 11 Install (006-018-026) .. 11 Remove (006-018-002) .. 10 Fuel Inlet Restriction (006-020) .. 12 Initial Check (006-024-001) .. 12 Fuel Pump Air Bleed Line (006-056).. 23 Remove (006-056-002).. 23 Install (006-056-026).. 24 Fuel Supply Lines (006-024) .. 12 Initial Check (006-024-001) .. 12 Inspect for Reuse (006-024-007) .. 13 Install (006-024-026) .. 13 Remove (006-024-002) .. 1324 Valve, Liter EnginePage b Injectors and Fuel Lines 7-89421 NHSection 10 Chapter 13 Issued 8-2001 Injector (006-026) .. 13 Assemble (006-026-025) .. 17 Clean (006-026-006) .. 15 Disassemble (006-026-003) .. 14 Inspect (006-026-062) .. 17 Inspect for Reuse (006-026-007) .. 15 Install (006-026-026) .. 18 Measure (006-026-010) .. 15 Remove (006-026-002) .. 13 Test (006-026-012) .. 15 Injectors and Fuel Lines - General Information .. 1 General Information .. 1 Injector Supply Lines (High Pressure) (006-051).

3 19 Initial Check (006-051-001) .. 19 Inspect for Reuse (006-051-007) .. 20 Install (006-051-026) .. 21 Remove (006-051-002) .. 2024 Valve, Liter EngineInjectors and Fuel Lines - General Information Injectors and Fuel Lines Page 17-89421 NHSection 10 Chapter 13 Issued 8-2001 Injectors and Fuel Lines - General InformationGeneral InformationD WARNING DFuel is flammable. Keep all cigarettes, flames, pilot lights, arcingequipment, and switches out of the work area and areas sharingventilation to avoid severe personal injury or death when workingon the fuel system. Injectors used in the 24 Valve, Liter engines have hole type noz-zles. High pressure fuel flows into the side of the injector and causesthe needle to lift and fuel to be injected. The clearances in the nozzlebore are extremely small and any sort of dirt or contaminants will causethe injector needle valve to stick. This is why it is important to cleanaround any fuel connection before servicing it.

4 Also, cap or cover anyopen fuel connections before a fuel system repair is pressure fuel is supplied to the injector (1) from the fuel pump viaan injector supply line (2) and a fuel connector (3). The end ferrule onthe injector supply line pushes against the fuel connector when the fuelline nut is torqued in the cylinder head. This force provides the sealingpressure between both the injector supply line to the fuel connectorand the connector to the torque on this line is critical. If the nut is under torqued, the sur-faces will not seal and a high pressure fuel leak will result. If the nut isover torqued, the connector and injector will deform and also cause ahigh pressure leak. The leak may result in an injector misfire and lubricate the threads of the high pressure line nuts with engineoil before tightening. Always make sure the proper torque is used onthe high pressure line fuel connector contains an edge filter that breaks up small contam-inants that enter the fuel system.

5 The edge filter uses the pulsatinghigh pressure to break up most particles so they are small enough topass through the : The edge filters are not a substitute for cleaning and coveringall fuel system connections during repair. Edge filters are not a substi-tute for maintaining the recommended engine mounted fuel Valve, Liter EngineInjectors and Fuel Lines - General InformationPage 2 Injectors and Fuel Lines7-89421 NHSection 10 Chapter 13 Issued 8-2001 The fuel filter is a spin-on flows around the outside of the filter and back up through the mid-dle. The filtering media is a 10 micron Stratapore design for efficientdebris removal. The filter also strips the water and collects it at the bot-tom of the filter to be drained 24 Valve, Liter Engine lift pump will run for approximately 30seconds after the key is switched on to assist with fuel priming. The liftpump will run during cranking and while the engine is running until the30 seconds has lapsed.

6 The lift pump will shut off anytime the key isswitched off. The 30 second timer is reset after each key switch cycleand ECM power the engine is started, additional fuel is drawn through the liftpump head via the gear pump. A valve in the head opens when thegear pump requires more flow than the lift pump can provide or whenthe lift pump is shut Valve, Liter EngineAir in Fuel (006-003) Injectors and Fuel Lines Page 37-89421 NHSection 10 Chapter 13 Issued 8-2001 Air in Fuel (006-003)Measure (006-003-010)D CAUTION DThe pressure of the fuel line is sufficient to penetrate the skin andcause serious bodily check for air in the high pressure lines, loosen the fittings at thehead. Crank the engine to allow entrapped air to bleed from the the Value: 37 N m [28 ft-lb]High pressure line tube nuts should be lubricated with fuel or oil CAUTION DDo not bleed a hot engine as this could cause fuel to spill onto thehot exhaust manifold creating a danger of the engine and vent one line at a time until the engine (006-003-012)The air bleed fitting on the CAPS fuel system creates a self-bleedingsystem during replacement of the supply side pressure fuel line removal and replacement will not require exter-nal bleeding to start the engine.

7 The CAPS fuel pump will create highfuel pressure during cranking and purge the air in the high pressureside through the , most of the air that enters the low pressure system duringcomponent replacement can be bled out by turning the fuel lift pumpon for 30 : To run the fuel lift pump for an additional 30 seconds, cycle thekey switch to off, pause for 30 seconds then turn the key switch to theON Valve, Liter EngineAir in Fuel (006-003)Page 4 Injectors and Fuel Lines7-89421 NHSection 10 Chapter 13 Issued 8-2001 NOTE: If an excessive amount of air has entered the system, the sys-tem will need to be the fuel supply line at the CAPS pump. Run the fuel lift pumpuntil the air has been bled. When all the air has been bled, retightenthe air continues to appear in the system for several minutes, an air leakis present. A source, which is often overlooked, for air to enter the fuelsystem is between the inlet of the pre-filter and the suction tube in thetank.

8 Fuel tanks that have the outlet fitting at the top will have a suctiontube at the bottom of the tank. Cracks or pin holes in the weld that joinsthe tube to the fitting can let air enter the fuel to make sure that all fittings from the fuel supply line on the tankto the inlet of the fuel lift pump are line leaks from the lift pump to the CAPS fuel pump may be lo-cated by operating the lift pump via an electronic service tool or keyswitch cycling, to build pressure in the fuel lines. Inspect all lines, con-nections, and filter assembly for an external fuel mmA stuck open injector can also blow combustion gas back into the pumpand cause air to be present in the overflow. If the engine seems to bemisfiring or running rough, break all the injector supply lines loose atthe pump end. Crank the engine and observe the lines. If combustiongas seems to be blowing back through the line, the injector is stuckopen. Remove and test the injector, refer to Procedure 006-026.

9 Torque Value: 24 N m [18 ft-lb]NOTE: Use two wrenches when loosening the lines at the fuel pump,one to hold the delivery valve and one to loosen the Valve, Liter EngineFuel Drain Line Restriction (006-012) Injectors and Fuel Lines Page 57-89421 NHSection 10 Chapter 13 Issued 8-2001 Fuel Drain Line Restriction (006-012)Measure (006-012)Remove the fuel drain line from the fitting at the rear of the lift a test the zero to 762 mm Hg [zero to 30 in Hg] pressure the engine at rated speed and no the reading on the the drain line pressure is out of specification, check for bends or kinksin the drain lines or plugged fuel tank vent Drain Line Pressuremm Hgin Valve, Liter EngineFuel Drain Lines (006-013)Page 6 Injectors and Fuel Lines7-89421 NHSection 10 Chapter 13 Issued 8-2001 Fuel Drain Lines (006-013)Initial Check (006-013-001)Inspect the drain lines for any signs of leaks, cracks, chafing, loose, orbroken (006-013-002)10 mmRemove the capscrew from the fuel line all fittings before disassembly.

10 Dirt or contaminants can damagethe fuel mm, 15 mmRemove the banjo fitting at the fuel pump return line. Use two wrench-es to prevent the fuel line from being drain line fittings at CAPS mmRemove drain line from the banjo connection at the rear of the Valve, Liter EngineFuel Drain Lines (006-013) Injectors and Fuel Lines Page 77-89421 NHSection 10 Chapter 13 Issued 8-200117 mm, 19 mmDisconnect the drain lines from the lift for Reuse (006-013-007)Inspect lines for clogging or a damaged (006-013-026)19 mm, 15 mmConnect fuel drain line at fuel pump banjo, rear fitting at the cylinderhead, and lift pump. Use two wrenches when installing the drain line atthe fuel pump return. Use new sealing washers at pump Value: 24 N m [18 ft-lb]10 mmInstall and tighten the clamp Value: 24 N m [18 ft-lb]24 Valve, Liter EngineFuel Filter (Spin-On Type) (006-015)Page 8 Injectors and Fuel Lines7-89421 NHSection 10 Chapter 13 Issued 8-2001 Run the engine under a load and check for Filter (Spin-On Type) (006-015)Remove (006-015-002)80 to 95 mm, Filter WrenchDisconnect wiring harness from WIF, if wiring harness from fuel heater (if equipped).