1999/04/01 Caterpillar


New Exhaust Manifold Group Seals Provides Improved Exhaust Gas Sealing{1059}

Usage:


3508 (95Y, 68Z),
3512 (49Y, 65Z) Industrial Engines;
3508 (6TJ),
3508B (5PS),
3512 (2WK),
3512B (3ZW),
3516 (9KF) Locomotive Engines;
3508 With EUI (3PS),
3508B (2BM, 7SM, 1TW),
3512 With EUI (3RS),
3512B (7HM, 4TN, 2GW),
3516B (8CN, 8KN, 3CW) Marine Engines;
3508B (3DM),
3512B (8EM, 1PW),
3516B (9AN, 2FW) Marine Auxiliary Engines;
3508 (23Z, 70Z),
3512 (24Z, 67Z) Generator Set Engines

Description of Change: Two new seals are used in the exhaust manifold group on these engines. One new seal goes between the exhaust manifold sections and one new seal goes between the exhaust manifold and cylinder head. These new seals use a spring energized "C-ring" design. The new seals have increased plating thickness, compared to the former seals. This increased plating thickness provides improved sealing with the mating surface. The new plating also results in increased yield strength at elevated temperatures.

Adaptable To: The new 167-9526 Seal and new 167-9527 Seal are direct replacements for the 7E-4108 Seal-Ring and 7E-8486 Seal-Ring respectively in the exhaust manifold groups and engines identified in Chart A. Chart B lists the engine effectivity of the new seals.


Locations of the new 167-9527 Seals (1) and new 167-9526 Seals (2) in a typical exhaust manifold group. Front Face Of Cylinder Block (X). Rear Face Of Cylinder Block (Y).

Caterpillar Information System:

1999/04/01 Re-Alignment Warning Tag On All 3500 Generator Sets Reminds Of Alignment Required At Installation{1021}
1999/04/01 New Oil Pump Group Used{1304}
1999/04/01 Use 154-8100 Fuel System Arrangement And 154-8101 Fuel System Group To Measure Engine Fuel Flow{1250,0782}
1999/04/01 New Fuel Shutoff Solenoids With Improved Durability Available{1259}
1999/04/01 Use 157-3716 (Exhaust) And 157-3717 (Intake) Valve Seat Drivers To Install Valve Seats In Engines With Unfinished Valve Guides{1103,0703}
1999/04/01 Needle Valve May Be Needed To Accurately Measure Engine Return Fuel Flow{1250,0782}
1999/04/01 Use 156-1060 Gas And 156-1070 Gas And Diesel Engine Analyzer To Check Emissions{1088,0781}
1999/04/01 New 153-9630 Sensor Test Group Adapter Kit For DataView Now Available{1000}
1999/04/01 New Caterpillar High Efficiency Fuel Filters With STAY CLEAN VALVES® Replace All Standard Fuel Filters In February Of 1999{1261}
1999/03/01 10W Hydraulic Oil Recommended For G3600 Hydraulic Actuators (HYDRAX) {5050,5095}
1999/03/01 Special Instructions For Converting To Hydraulic Actuator System (Hydrax) Now Available {1716}
1999/03/01 New O-Ring Seals Help Prevent Coolant Leaks In High Jacket Water Temperature Applications {1100,7555}
1999/04/01 Be Sure To Use The Correct Gas Fuel Pressure{1250,1270,1293}
1999/04/01 Using The Correct Diode When Using The Customer Communication Module In Multiple Engine Applications{1902,0374}
1999/04/01 Heinzmann Wastegate Actuator Relocated{1057}
1999/04/01 New Cover And Plate Assembly Used In Oil Level Contactor Groups To Help Resist Vibration Damage{1326,7450}
1999/04/01 Protection From Paint Is Required For The G3600 Hydraulic Actuator (Hydrax) Shaft{1909,7581}
1999/04/01 New 155-5175 AC Current Probe For Generator Sets Now Available{1400,4450}
1999/04/01 Improved Data Logger Feature For Customer Communication Module{1926}
1999/04/01 Special Instruction, REHS0345-01, "Generator Service Literature Index" Is Available{4450}
1999/04/01 Updated 133-6350 EMCP II Generator Set Control Group Corrects Hourmeter Programming and Spare Fault Operation{4490}
1999/04/01 New Control Panel Films Show That SR4B Generators Are Not To Be Wired In The Delta Configuration{7557,7566}
1999/05/01 Use 157-3722 Driver To Remove And Install Engine Valve Guides{0703,1104}
1999/05/01 Cold Start Advance Solenoid Available{1272,1250}
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