1988/12/26 Caterpillar

New Screw Used In BrakeSaver Water Lines Group {1155}

Usage:

3406B Truck Engines (8TC, 4MG) Equipped With BrakeSavers

Description of Change: A new allen head screw is used in place of the former hex head bolt in the BrakeSaver water lines group on 3406B Truck Engines. The illustration shows the location of the new allen head screw. In some cases the former hex head bolt could contact the new rubber end sheet oil cooler. The new screw will eliminate this problem.

Location of the new 6J0488 Screw (allen head).

Adaptable To: The new 6J0488 Screw is a direct replacement for the former OS1594 Bolt, at the location shown in the illustration, in the 4W5184 Brakesaver Water Lines Group on 3406B Truck Engines. The new 6J0488 Screw is in effect with 3406B Truck Engines 8TC5232 and 4MG31626. The new 7W1713 Oil Cooler was in effect with 3406B Truck Engines 8TC2240 and 4MG13412.

Caterpillar Information System:

1988/12/26 Check Load Height Before Transporting Machines {7500}

1988/12/19 Do Not Use Heli-Coils® To Repair Rocker Arm Assemblies On 5.4" Bore Engines {1123}

1988/12/19 New Piston Body Assemblies Used {1214}

1988/12/19 Correct Timing Specification {0374}

1988/12/19 Larger Valve Springs Must Be Used With Williams Blue Ox® 485 kPa (70 psi) Exhaust Brake; New Spring Compressor Group Available {1108,1109,1119,0702,0703}

1988/12/19 Check Assembled Dimension For Rack Lever Travel If Governor Housing Assembly Is Replaced {1264}

1988/12/19 New Camshafts Used; Camshaft Installation Kits Available {1209,1210}

1988/12/19 New Material Used For Rotating Seal Rings In Some Power Shift Transmissions, Steering Clutches And Torque Converters {3101,3150,4100}

1988/12/12 Valve Kit Available For Explosion Relief Valve{1201,1233}

1988/12/12 Oil Cooler Bypass Elbow Changed To Prevent Bypass Valve Seizure{1314,1318}

1988/12/12 New Alternator Drive Pulley Has Hardened Wear Sleeve; New Seal Used On Pulley{1425,1357}

1988/12/12 Maintenance Procedure Extends Service Life Of Exhaust Manifold Studs{1050}

1988/12/26 Remove Fuel From Electronic Control Module (ECM) Before Shipping {1705}

1979/01/08 Prevention Of Fires On Hydraulic Excavators{7000,5057}

1979/01/08 Check The Adjustment Of The Original Tachometer Before A New Tachometer Is Installed{7462}

1979/01/08 A New 6V29 Sleeve Metering Fuel System Pump Roll Pin Tool Is Used To Adjust And Make A Replacement Of Roll Pins In The Fuel Injection Pump Housing{0626}

1979/01/08 New 6V87 Gauge Measures Valve Stem Wear{0653,1105}

1979/01/08 Improved Woodward Governor Groups{1264,1289}

1979/01/15 5P9705 Tapered Rod Tool Group Used For Removal And Installation Of Piston Pin Bearings In Tapered Connecting Rods{0622,1214,1218}

1979/01/15 Removal And Installation Of Taper Type Bearings{0622,1214,1219}

1979/01/15 6V83 Emery Polishing Paper{0675}

1979/01/22 Current Chart For Dynamometer Adapters{0651,1000}

1979/01/22 New Tachometer Drive Adapter Has Increased Service Life{7462,1288}

1979/01/22 Ether Starting Aid Groups Are Now Available{1456}