An Improved Cooling System Venting Procedure is Now Available in the Operation and Maintenance Manual for Certain C175 Off-Highway Truck Engines {0374, 1350}
- Off-Highway Truck/Tractor
- 793F (S/N: SND1-UP; SSP1-UP; SXP1-UP; D3T1-UP; RBT1-UP)
- 794 AC (S/N: MN51-UP; MT51-UP)
- 795F AC (S/N: ERM1-UP)
- 795FAC XQ (S/N: SNT1-UP)
- 797F (S/N: LAJ1-UP; LTZ1-UP)
- 794 AC (S/N: MN51-UP; MT51-UP)
An improved venting procedure is now published for C175 Off-Highway Truck Engines. The improved procedure provides more consistent venting of air at start-up after the cooling system has been drained.
Proper venting of air from the cooling system ensures adequate coolant flow to the water pump seals during startup.
Note: Failure to vent the cooling system properly will result in decreased water pump life and risk of water pump leakage. The cooling system must be properly vented after any maintenance event in which the cooling system has been drained below the level of the engine cylinder heads.
The new procedure can be found in the Operation and Maintenance Manual , Cooling System Coolant (ELC) - Change procedure, under the section Air Purge Procedure Using Cat ET.
Caterpillar Information System:
Premature Nose-Cone and King-Pin Wear May Occur on Certain 794, 796, and 798 Off-Highway Trucks {3260, 4314} Premature Nose-Cone and King-Pin Wear May Occur on Certain 794, 796, and 798 Off-Highway Trucks {3260, 4314}
Diesel Exhaust Fluid (DEF) Pump on Certain C4.4 Engines {108U, 1439} Diesel Exhaust Fluid (DEF) Pump on Certain C4.4 Engines {108U, 1439}
EMCP 4.4 1G1U (Single Generator, Single Utility) Checklist {7002} EMCP 4.4 1G1U (Single Generator, Single Utility) Checklist {7002}
340 Excavator Mirror
Installation Procedure for 2nd Auxiliary Lines Kit on Certain Mini Hydraulic Excavators {5057} Installation Procedure for 2nd Auxiliary Lines Kit on Certain Mini Hydraulic Excavators {5057}
Inspection of the Rear of the Engine on Certain C4.4 Machines {1201} Inspection of the Rear of the Engine on Certain C4.4 Machines {1201}
Certain Cat® Product Link A6 Platform Network Managers May Stop Reporting and Loses Communication {7606} Certain Cat® Product Link A6 Platform Network Managers May Stop Reporting and Loses Communication {7606}
The 521-5433 Fuel Pump Gp May Fail on Certain 3500 Industrial Engines {1256} The 521-5433 Fuel Pump Gp May Fail on Certain 3500 Industrial Engines {1256}
Improved Assembly Process for the Pin in the Windshield Group Is Now Available for Certain Excavators {7310} Improved Assembly Process for the Pin in the Windshield Group Is Now Available for Certain Excavators {7310}
Improved Attachment Valve (F2) Is Now Used on Certain 320, 320 GC and 323 Excavators {5051} Improved Attachment Valve (F2) Is Now Used on Certain 320, 320 GC and 323 Excavators {5051}
New Resistance Temperature Device (RTD) Module Software Is Now Used for Certain Engines {1920} New Resistance Temperature Device (RTD) Module Software Is Now Used for Certain Engines {1920}
Inspect the 144-0367 Hose Clamps Between the Sea Water Pump Outlet and Aftercooler Inlet on Certain C18 Marine Engines {1063, 3319} Inspect the 144-0367 Hose Clamps Between the Sea Water Pump Outlet and Aftercooler Inlet on Certain C18 Marine Engines {1063, 3319}
New Hard Washers are Used for the Mounting Hardware on the Oil Scavenge Pump for Certain C175 Off-Highway Truck Engines {1312} New Hard Washers are Used for the Mounting Hardware on the Oil Scavenge Pump for Certain C175 Off-Highway Truck Engines {1312}
An Improved Fuel Injector is Now Used on Certain C9.3 Machine Engines {1251, 1254, 1290, 1713} An Improved Fuel Injector is Now Used on Certain C9.3 Machine Engines {1251, 1254, 1290, 1713}
New Engine Software Is Now Used for Certain C175 Locomotive Engines {1920} New Engine Software Is Now Used for Certain C175 Locomotive Engines {1920}
Identifying Oil Leaks on Certain 3500 Mining Machine Engines {1151, 1348} Identifying Oil Leaks on Certain 3500 Mining Machine Engines {1151, 1348}
New Tooling and Installation Process for Crankshaft Seal on C27 and C32 Engines {0701, 1160, 1161} New Tooling and Installation Process for Crankshaft Seal on C27 and C32 Engines {0701, 1160, 1161}
Improved Auxiliary Sea Water Pump Group is Now Used on Certain C12 Marine Engines {1371} Improved Auxiliary Sea Water Pump Group is Now Used on Certain C12 Marine Engines {1371}
New Shipping Procedure Is Now Used for Stick Cylinder Pinned in Shipping Position on Certain 308 and 309 Mini Hydraulic Excavators {0355} New Shipping Procedure Is Now Used for Stick Cylinder Pinned in Shipping Position on Certain 308 and 309 Mini Hydraulic Excavators {0355}
New Solenoid Assembly is Now Used on Fuel Injectors for Certain C9.3 Industrial Engines {1251, 1290} New Solenoid Assembly is Now Used on Fuel Injectors for Certain C9.3 Industrial Engines {1251, 1290}
New Engine Software for Certain C7.1 Engines {1920} New Engine Software for Certain C7.1 Engines {1920}
New Engine Harness Assembly is Now Available For Certain Excavators and Mobile Hydraulic Power Units {1408} New Engine Harness Assembly is Now Available For Certain Excavators and Mobile Hydraulic Power Units {1408}
The Fuel Vent Tube May Crack on Certain C175–16 Marine Engine {1274} The Fuel Vent Tube May Crack on Certain C175–16 Marine Engine {1274}
G3500 Generator Sets Starting Motor - Inspect