1988/02/01 Caterpillar

New Shaft Used In Auxiliary Sea Water Pumps{1371,1389,1350}

Usage:

3408, 3412, 3508, 3512 Industrial, Marine And Generator Set Engines

Description of Change: Improvements have been made to the auxiliary sea water pumps used on the above engines. A thicker nut is used for mounting the impeller to allow a higher torque. Also, a new shaft has two cross-drilled holes for the cotter pin instead of the one hole used in the former shaft. The two holes require less adjustment on the nut for aligning the cotter pin with the slot in the nut. With these changes, the torque for the nut has been increased from 60-70 N·m (44-50 lb ft) to 160 N·m (120 lb ft).

Adaptable To: The new 7C3613 Pump Group is a direct replacement for the former 3N7790 Pump Group which is canceled and is adaptable to 3408 Industrial and Marine Engines and 3412 Industrial, Marine and Generator Set Engines. The new 7C3614 Pump Group is a direct replacement for the former 5N2600 Pump Group which is canceled and is adaptable to all of the above engines except 3408 Industrial Engines. The new 7C3493 Shaft and 8C503 Nut replace the former 3N8451 Shaft which is canceled.

Caterpillar Information System:

1988/02/01 Replacement Gaskets Available For "V-E" Electrical Connectors{7553}

1988/02/01 New 1U7646 Coupler Available To Connect 1 "-12 Threaded Studs{0700}

1988/01/25 New Engine Oil Coolers Have Rubber End Sheets {1378}

1988/01/25 8T5314 Socket Adapter Available To Correctly Install Alternator Pulley Nut {0601}

1988/01/25 New Bearings Available For Reverse Idler Gear {3300}

1988/01/25 New Microfiche Shows Part Numbers And Locations Of Decals And Stripes {0374,7557}

1988/01/25 New Undercarriage Reconditioning Bulletin-Sealed And Lubricated Track Servicing Procedure For Non-Restrained Track {4150,0374}

1988/01/04 Die Cast Flywheel Housing Has Less Weight{1157}

1988/01/04 New FT2253 Cable Assembly Drawing Available For Kent-Moore Fuel Injection Test Bench{0782}

1988/01/04 Part Numbers For Bulk Lengths Of Decal Stripes{7557}

1988/01/04 Be Sure To Follow Correct Procedure When Checking Transmission Primary Clutch Pressures With Transmission Installed In Machine{3150}

1978/12/18 Caution: Do Not Change Orifice In Water Outlet Of Auxiliary Pump Group{1371}

1988/02/08 New Transmission And Engine Oil Cooler Has Rubber End Sheets{1375,1378}

1988/02/15 Assembly Of Face Seals And Connectors{0738,1250,4300,5050}

1988/02/15 Hydraulic Test Bench Fittings Can Be Adapted To Quick Disconnect Fittings{0600,0784,5050}

1988/02/15 CXP Fluids Available From Caterpillar Inc.{0645,1318,1395,3000,4050}

1988/02/15 New Wear Sleeve Available For Alternator Drive Pulley{1400,1405}

1988/02/15 Servicing And Programming PEEC Truck Engines Equipped With Kysor® Shutdown System{1250}

1988/02/22 Correct Procedure To Weld Bucket Tip Adapters To Base Cutting Edge Of Bucket{6803}

1988/02/22 Analyzing Caterpillar And Competitive Antifreezes For Amount Of Silicates{1350,1395}

1988/02/22 Fluid Sampling Tools For Non-Pressurized Compartments{0786}

1988/02/22 New 1U8271 Timing Advance Holding Tool Available{0766}

1988/02/22 Product Support Literature Available For Electronic Modular Control Panels Used On SR4 Generators{0374,4450,7002}

1988/02/22 Cold Weather Starting{1213,1250,1274,1450}