Change Routing Of Heater Return Hose To Improve Heater Efficiency{7304,1361}
Usage:
3176 Truck Engines
Incorrect routing of heater hoses has led to complaints of insufficient cab heat. To correct this problem, reroute the heater return hose to the inlet side of the water pump. Remove the 2B0858 Plug and connect the hose at this location. See illustration. If this port in the water pump is already in use, tee into the engine shunt or water inlet line. Do not connect the heater return hose to the thermostat housing.
Correct location of heater return hose at water pump.
Caterpillar Information System:
1989/06/26 Air Vent Line Improves Cooling System Performance{1395,1350}
1989/06/19 New Pistons Used With Two Keystone Compression Rings{1156,1205,1214,1215}
1989/06/19 New Seal Used In Auxiliary Water Pump Groups{1361}
1989/06/19 Special Instruction, "Battery Charging Rate And Time Tables," Available On Oil Resistant Paper{0374,1401}
1989/06/19 Identification Of Asbestos-Free Material{0353,0112,0648}
1989/05/29 "CXP Fluids" Are Now "Cat Fluids" {0645}
1989/05/29 Maintenance Inspection Of Emergency Shutdown Systems Required Every 1000 Hours {7400}
1989/05/29 New Extension Assembly Used In Gas Engine Ignition Groups {1558}
1989/05/29 New Upper and Lower Seals For Folded Core Radiators In Cold Temperature Applications {1353}
1989/05/22 New Clamps With Grommets Used In Fuel Lines, Turbocharger Oil Supply Lines, And Turbocharger Water Supply Lines {1274,1307,1380}
1989/05/22 Check Valve Added To Fuel Injection Lines {1274}
1989/05/22 New Front Crankshaft Seal Requires New Installer Tool {1160,1202,0704}
1989/06/26 Damper Groups Improved To Help Prevent Leaks Of Viscous Fluids{1205}
1989/06/26 New Connector With An Orifice Added To Fuel Injection Lines Groups To Help Prevent Cavitation{1274}
1989/07/03 Air Conditioning Service Tooling{0757,0786,7320}
1989/07/03 Use Same Torque For All Sizes Of Threaded Crown Hydraulic Cylinders{5100,7562}
1989/07/10 New Viton Rubber Seals Used{1302,1307,1312,1306,1317,1200}
1989/07/10 New, Larger Vibration Damper Improves Wear Life{1205}
1989/07/17 PEEC Training And Diagnostic Training Program Available{0314,0372,1705}
1989/07/24 New Publication Available, "Metal Spray Guide"{0374}
1989/07/24 New Publication Available, "Ultrasonics Guide"{0374}
1989/07/24 Check The Radiator Fan Spider Assembly When Doing Yearly General Maintenance{1356}
1989/07/24 Subscription Service Available For ECAP And DDT Service Program Modules{0782,1705}
1989/07/24 Separate Grounding Of Throttle Limit Switch And Shutoff Solenoid Improves Component Reliability; New Throttle Limit Switch Used{1269,1155,1400}