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}
Body May Interfere with Mud Guard at Rear of Left Fender Group {4220, 7252} Body May Interfere with Mud Guard at Rear of Left Fender Group {4220, 7252}
The Hoist Lines Group is Improved on Certain 793D Off-Highway Trucks {5057} The Hoist Lines Group is Improved on Certain 793D Off-Highway Trucks {5057}
776D and 777D Off-Highway Truck/Tractor Tire Inflation - Check
277C, 287C and 297C Multi Terrain Loaders Maintenance Interval Schedule
Diesel Exhaust Fluid (DEF) Pump on Certain C4.4 Engines {108U, 1439} Diesel Exhaust Fluid (DEF) Pump on Certain C4.4 Engines {108U, 1439}
Deck Wrench Cylinder Duty Cycle May Not Be Within Specification on Certain MD6200, MD6250, and MD6310 Rotary Drills {7562} Deck Wrench Cylinder Duty Cycle May Not Be Within Specification on Certain MD6200, MD6250, and MD6310 Rotary Drills {7562}
Fenders May Crack on Certain Telehandlers {7252} Fenders May Crack on Certain Telehandlers {7252}
Alternators for C3.4B Engines May Fail on Certain Telehandlers {1405} Alternators for C3.4B Engines May Fail on Certain Telehandlers {1405}
Quick Coupler Harness Receptacle May Pinned Wrong and Quick Coupler Switch May Malfunction on Certain 986K Wheel Loaders {1408} Quick Coupler Harness Receptacle May Pinned Wrong and Quick Coupler Switch May Malfunction on Certain 986K Wheel Loaders {1408}
New Software Version Is Now Available for Certain Cat® MineStar System {7605, 7620} New Software Version Is Now Available for Certain Cat® MineStar System {7605, 7620}
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}
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}
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}
Air Bubbles Can Be Visible on Films Applied on Certain Material Handlers and Wheeled Excavators {7405, 7557} Air Bubbles Can Be Visible on Films Applied on Certain Material Handlers and Wheeled Excavators {7405, 7557}
New Machine Software Groups are Now Used on Certain Telehandlers {7610, 7620} New Machine Software Groups are Now Used on Certain Telehandlers {7610, 7620}
Governor Pedal Group or Cable Assembly for the Engine May Stick on Certain Backhoe Loaders {1265} Governor Pedal Group or Cable Assembly for the Engine May Stick on Certain Backhoe Loaders {1265}
New Engine Software for Certain C7.1 Engines {1920} New Engine Software for Certain C7.1 Engines {1920}
Wrong Resistor May be Installed into 176-9668 Instrument Console Gp on Certain Excavators and Wheel Loaders {1408, 1437, 6129} Wrong Resistor May be Installed into 176-9668 Instrument Console Gp on Certain Excavators and Wheel Loaders {1408, 1437, 6129}
Payload Harness Grommets Are Now Installed on Certain 700 Series Articulated Trucks {1408, 7150} Payload Harness Grommets Are Now Installed on Certain 700 Series Articulated Trucks {1408, 7150}
A New Special Instruction Is Now Used to Rework the Weld Crack on A-Pin Doubler Plate for Certain 966L, 966M, 972L, and 972M Medium Wheel Loaders {0679, 7054} A New Special Instruction Is Now Used to Rework the Weld Crack on A-Pin Doubler Plate for Certain 966L, 966M, 972L, and 972M Medium Wheel Loaders {0679, 7054}
725C2 and 730C2 Articulated Truck Machine System Sensor - Remove and Install - Payload