3848910 Volvo.Penta Wiring harness

Engine Compartment
Walk-Around Inspection
Inspect Engine for Leaks and Loose Connections
For maximum service life of your truck engine, make a thorough under the hood inspection before starting the engine. Look for such items as oil or coolant leaks, loose bolts, worn fan and accessory drive belts, loose connections and trash build-up. Remove trash build-up and have repairs made as needed. Check the fluid levels more frequently than the recommended maintenance intervals and continue to monitor fluid levels until any leak is found and fixed.* Wipe all fittings, caps and plugs before performing maintenance to reduce the chance of system contamination.* Inspect all lines, tubes and hoses carefully. Do not use your bare hands to check for leaks. Tighten all connections to the recommended torque.Inspect:* Radiator and ATAAC core for leaks and trash build-up.* Radiator and ATAAC air intake system hoses and elbows for cracks and loose clamps (especially in arctic conditions).* Fan and accessory drive belts for cracks, breaks or other damage (especially in arctic conditions). Inspect:* Water pump for coolant leaks. The water pump seal is lubricated by coolant and it is normal for a small amount of leakage to occur as the engine cools down and parts contract. If leaks are found, check the coolant level frequently and continue to monitor the level until the water pump is repaired. Excessive coolant leakage may indicate the need to replace the water pump seal. For removal and installation of water pumps and/or seals, see the Service Manual for this engine or consult Caterpillar.Inspect:* Lube system for leaks, such as front and rear crankshaft seals, oil pan, oil filters and valve covers.* Fuel system for leaks, loose fuel line fittings and loose or worn hoses.* Engine wiring and harnesses for loose connections and worn or frayed wires (especially in arctic conditions).* Engine electrical grounding system for good connections and condition. Some vehicles will use a starter to battery ground strap. If a starting motor change is made, consult Caterpillar to make sure that the proper grounding procedures are followed for that model starting motor.* All guards must be in place. Repair or replace missing or damaged guards.Engine Crankcase
Make sure you read and understand the information in the Safety and Lubricant Specifications sections of this Manual before you proceed with maintenance of the crankcase lube oil system.
Check Oil Level
The vehicle must be parked on a level surface to perform this maintenance procedure.
1. Check the oil level with the engine stopped. DO NOT check the oil level with the engine running. Refer to the Refill Capacities chart for the proper amount of oil at oil change time to determine the correct position on the dipstick for your application. If more oil than the specified Refill Capacity is required to reach the OPERATING RANGE (FULL) mark, consult Caterpillar. DO NOT OVERFILL above the OPERATING RANGE (FULL) mark on the dipstick. 2. Maintain the crankcase oil level between the ADD and OPERATING RANGE (FULL) marks on the dipstick. Operating your engine when the oil level is above the OPERATING RANGE (FULL) mark could cause your crankshaft to dip into the oil. Air bubbles created from the crankshaft dipping into the oil will reduce the lubricating characteristics of your oil and cause engine damage.3. Remove the oil filler cap and add oil if necessary. See Refill Capacities and Lubricant Specifications for the size of your engine crankcase and recommended oil to use.Cooling System
Make sure you read and understand the information in the Safety and Cooling System Specifications sections of this Manual before you proceed with maintenance of the cooling system.
Check Coolant Level
1. Check the coolant level in the coolant recovery tank with the engine stopped and cool.2. Remove the filler cap and maintain the coolant level within specified sight marks for COLD or HOT engine, if equipped.3. Inspect the radiator filler cap. Replace the cap if gaskets are damaged. Install the radiator filler cap.4. Inspect and clean the radiator fins if required.Engine Air Cleaner
Check Service Indicator
Typical air cleaner indicator shown.Your engine may be equipped with a different indicator, or a gauge supplied by the truck/vehicle manufacturer.If the vehicle is equipped with an intake restriction gauge or some other system, follow the truck/vehicle manufacturer's recommendations.
Never service the air cleaner with the engine running since this will allow dirt to enter the engine.
* Observe the air cleaner service indicator (if equipped). Replace the air cleaner element when the yellow diaphragm enters the red zone, the red piston locks in the visible position or 6.25 kPa (25 inches H2O) on restriction gauge. If the air cleaner indicator shows red at any time, replace the filter element.
Replace elements at intervals recommended by the air cleaner or truck manufacturer's recommendations or when required by the restriction indicator and operating (dust, dirt, snow and debris) conditions, or when required by the restriction indicator. If your air cleaner element becomes plugged, the air can split the element filter material. Unfiltered air will drastically accelerate internal engine wear.
* Service the air cleaner at regular intervals as determined by the vehicle manufacturer's recommendations and dust conditions. Check the precleaner (if equipped) daily for accumulation of dust, debris or snow. Remove any debris as needed. When operating in snow, attach a burlap sack to the precleaner. Allow the sack to be loose enough to blow in the wind and clean itself. DO NOT allow sack to come in contact with moving parts or heated components (i.e. exhaust manifold or piping).* Replace the element at least EVERY YEAR even though the maximum restriction may not have been reached.Remove and Install Air Cleaner Elements
* Loosen the retaining bolts and remove the end cover on the air cleaner housing. Remove and inspect the filter elements for damaged pleats, gaskets or seals. Insert a light inside and inspect it for rips and tears. Discard the element if damaged. Do not use a filter element with damaged pleats, gaskets or seals. Clean the inside of the housing. Replace the element in the housing and install the end cover on