TUBE AS 7U9627 - Caterpillar

1. Thoroughly clean the area around each fuel line connection. Disconnect fuel injection line (1) from the adapter. Disconnect fuel injection nozzle (2) from the adapter.2. Remove clamp (3) and the spacer that holds the fuel injection nozzle in place.
Never use force to remove the fuel injection nozzles. If necessary, turn and pull the fuel injection nozzle out of the cylinder head.
3. Remove the adapter (4) from the cylinder head. Remove the fuel injection nozzle.Install Fuel Injection Nozzles
Before the fuel injection nozzles are installed, check for fuel leakage, the pressure at which the injection nozzle opens, and the amount of fuel (spray pattern) that comes out of the nozzle with tool (A). See TESTING FUEL INJECTION NOZZLES in TESTING AND ADJUSTING.
1. Remove carbon seal dam (2) with pliers. Remove compression seal (1). 2. Install a new compression seal on the nozzle. Install a new carbon seal dam with tool (B).3. Make sure the bore in the cylinder head and the fuel inlet fittings are clean. 4. Install new O-ring seals on adapter (3) and fuel injection nozzle (4).5. Install the fuel injection nozzle in the head. Turn and push the nozzle into its correct position. Never put lubricant on the nozzle or bore in the cylinder head.6. Install the adapter in the head. Connect the nozzle and fuel injection line to the adapter. Tighten the nuts to a torque of 30 5 lb.ft. (40 7 N m).7. Install the spacer and clamp (5) that hold the nozzle to the cylinder head.end by:a) install rocker shaftsDisassemble Fuel Injection Nozzles
start by:a) remove fuel injection nozzles Do not disassemble any nozzle until test has shown it is needed. Check each nozzle with tool (A) for leakage, the pressure, at which the nozzle opens, and the shape and amount of fuel (spray pattern) that comes out of the nozzle. Do not clean or make an adjustment to any nozzle that has a large (excessive) amount of return leakage. Excessive return leakage can be an indication of nozzle failures that can not be corrected with an adjustment or cleaning and can cause engine damage. See TESTING FUEL INJECTION NOZZLES in TESTING AND ADJUSTING.
Keep the work area and all tools extra clean. Be careful not to cause damage to the parts while the nozzles are disassembled and assembled.
1. Remove cap (1) from the fuel injection nozzle. 2. Put the nozzle in tool (B). Put tool (B) and the nozzle in a vise. Do not put any part of a nozzle directly in a vise. Loosen locknut (2) while the lift adjustment screw is held. Turn the lift adjustment screw (3) counterclockwise one turn. Hold the lift adjustment screw (3) with a 5/64" hex wrench and remove the locknut (2).
If the lift adjustment screw is not turned counterclockwise one turn, the valve can be bent or the seat for the valve can be damaged when the pressure adjustment screw is turned.
3. Loosen the locknut (4) that holds the pressure adjustment screw. Use tool