Installation Manual - Diesel Parts, Repair and Service ...

1 Box 27822 Houston, Texas 77227 InstallationManualModel T346A Engine BrakesFor Caterpillar 3406, 3406 BAnd 3406C Series EnginesEngine BrakesDIESELUSAGROUP brought to you by:get more at more info at: MANUALTECBRAKE MODEL T346A ENGINE BRAKEFOR CATERPILLAR 3406, 3406B AND 3406 CSERIES ENGINESECTION 1-INTRODUCTIONThe TecBrake T346A engine brake may be installed onCaterpillar model 3406, 3406B and 3406C series engines although similar, were produced withvariations that affect the components required and theinstallation TecBrake Engine brake is designed as a devicefor slowing a vehicle, not stopping it.

2 It is to be usedin conjunction with, but not a substitute for thevehicle s Service brakes. The Service brakes mustbe in good operating condition and used to bringthe vehicle to a complete RequiredThe TecBrake kit includes all of the parts required tomake an Installation on the most common engineconfigurations. An optional shim & washer kit (Part ) is required on all engines with a serial numberlower than 7FB39279, or with a 92U prefix. This is notincluded with the engine brake kit and must be orderedseparately. Refer to the identification plate on valve coverfor required TecBrake kit does not contain a control group.

3 Fivedifferent control groups are available to cover allapplications. These groups must be ordered separatelyin addition to the basic to the TecBrake Parts Manual for ToolsThe following special tools are required for Installation :TecBrake ToolsTecBrake TJ018488 Caterpillar ToolsCaterpillar Line Socket-Flank Drive 3/4 Line Wrench-7/8 Pin-Fuel Pump (3406) Pin-Fuel Pump (3406B) Tool9S9082 Recommended Torque ValuesBridge Adj. Screw lock nuts-24 lbft(32 N*m)Cylinder Head Bolts-330 lbft (450 N*m)Engine brake Hold-down nuts-100lbft (135 N*m)Engine brake 7/16 cap screws-60lbft(82 N*m)Rocker Arm Adj.

4 Screw nuts-22 lbft(30 N*m)Slave Piston Adj. Screw nuts-16 lbft(22 N*m)Fuel Lines-30lbft(41 N*m)SECTION 2 - ENGINE PREPARATION1 Figure 2-11. Thoroughly clean engine before beginning all engine components necessary to permit accessto cylinder 2-22. Remove the upper valve 2-33. Remove the valve cover more info at: procedure specified below to set engine tocylinder compression. This procedurewill allow three cylinders to be adjusted for bothvalves and engine brakes without rotating theengine. One additional rotation to cylinder No compression will be required to adjust theother three Bolt Method to obtain 2-44.

5 From just above the starter, remove the timing boltfrom its storage location and the access plate to 2-55. Insert the Caterpillar Turning Tool P/N 9S9082 2-66. Insert timing bolt in location shown and rotate engineusing the Caterpillar Turning Tool counter clockwise (lookingfrom the flywheel side of the engine) until the timing bolt isaligned with the threaded hole in the flywheel. When thetiming bolt can be threaded into the tapped hole in theflywheel, the engine is at cylinder No. 1. Look atboth valves on cylinder No. 1 to see if they are both closed, cylinder No.

6 1 is on the compression stroke. Ifnot, remove the timing bolt and rotate the engine 360degrees until the timing bolt is aligned with the thread inthe tapped 2-77. Check both rocker arms on cylinder No. 1 to make surethere is clearance by moving the rocker arms up and insures cylinder is on the compression the access to the flywheel is not available, then anoptional method that is described below can be Pump Method to obtain Remove the plug from the fuel injection pump as shownin Figure 2-8 Figure 2-82. Select correct timing pin identified in section one - Insert timing pin in hole in fuel pump and slowly rotatecrankshaft counterclockwise until pin drops into more info at: engine is now at cylinder No.

7 1 top dead centercompression not bar engine with timing pin inserted in fuelpump. Pin may be sheared off and cause 2-94. Mark crankshaft vibration damper to locate cylinder#1 This mark will be required after engine brakeassembly for engine valve and engine brake Remove timing pin from fuel pump and install sealplug back in Of Fuel TubeCAUTIONA void any contamination of fuel lines or nozzleassemblies. Fuel contamination after fuel filters cancause engine 2-101. Remove fuel lines using Caterpillar s fuel line Install protective caps on nozzle assemblies and putfuel lines in clean plastic Install plastic plugs in open fuel 2-11 Rocker Arm RemovalCAUTIONI nstall only one brake housing at a time to avoidremoving all six engine head bolts at once.

8 Removingsix head bolts can cause head seating 2-121. Loosen rocker arm adjusting screw Remove rocker arm hold-down bolts. Save washers 2-133. Remove the rocker arm assembly from the more info at: 2-144. Remove the exhaust valve bridges from the 2-155. Back out the bridge adjusting screw. Leave loose; donot tighten until placed on engine for Leveling ProcedureFigure 2-161. Lubricate bore of exhaust valve bridge with cleanengine lubrication oil prior to Installation on engine. InstallTecBrake exhaust bridges on the Level the TecBrake exhaust valve bridges :a) Press on center of bridge with ) Loosen adjusting screw a couple of turns to insurescrew is not contacting valve )Turn adjusting screw clockwise until contact with thevalve ) Turn adjusting screw an additional 30 degrees(approximately flat of screw).

9 E) Hold adjusting screw in position and torque jam nut to24 lbft (32N*M).f)Apply clean engine lubrication oil to top of bridge whererocker arm ) Adjust (3) intake valve bridges using same procedureas 2-173. Verify there is at least minimum clearance betweenthe bridge body and valve spring retainers on both sides Exhaust Rocker Adjusting ScrewsFigure 2-181. Remove the slotted Caterpillar exhaust rocker adjustingscrews from the rocker Remove jam nuts from rocker adjusting more info at: Place jam nuts on TecBrake exhaust rocker 2-194. Install the TecBrake exhaust rocker screw in theexhaust rocker Discard the Caterpillar slotted adjusting of Dowel Pin5 Figure 2-201.

10 Place Dowel Pin Removal Tool in position to removethe dowel pin that is located on the front end (fan side) ofthe rocker shaft Clamp dowel pin in dowel pin removal Remove dowel pin by tightening the two jacking screwin small equal increments (approximately turn each).This process must be repeated on the other rocker shaftassembly, also on the front end (fan side).NOTEThe dowel pins that are being removed are locatedat cylinder # 1 and cylinder # 2-214. Apply clean engine lube oil to the end of the TecBrakeOil Supply Insert adapter in removed dowel pin hole, making surepedestal and rocker shafts holes Complete adapter Installation by using a plastic hammerto tap adapter down until large contacts rocker not install O ring on adapter at this Arm Assembly InstallationFigure 2-221.