0335547 JOHNSON CAM, Throttle

All valves in fuel return line must be open before and during engine operation to prevent high fuel pressure. High fuel pressure may cause filter housing failure or other damage.Each time any significant quantity of oil (or other fluid) is spilled on or near the engine it should be cleaned up. Accumulated grease and oil on an engine is a fire hazard. Remove this debris with steam cleaning or high pressure water.Wipe clean all fittings, caps and plugs before servicing.
Diesel engine exhaust contains products of combustion which may be harmful to your health. Always start and operate the engine in a well-ventilated area and, if in an enclosed area, vent the exhaust to the outside.
Do not start the engine or move any of the controls if there is a DO NOT OPERATE or similar warning tag attached to the start switch or controls.The operator must be satisfied that no one will be endangered before starting the engine.If the engine has not been run for several weeks, fuel may have drained and allowed air into the filter housing. Also, when fuel filters have been changed, some air space will be left in the housing. In these instances, prime the fuel system.Refer to Priming the Fuel System in this publication for more information.For starting below -18°C (0°F), use of optional cold weather starting aids are recommended. A cylinder block coolant heater or extra battery capacity may be required.For temperatures below -23°C (-10°F) consult your Caterpillar dealer.Electric Starting
Startability will be improved at temperatures below 16°C (60°F) by the use of a starting aid. A jacket water (coolant) heater or other means can be used to heat the crankcase oil.Start the engine using the following procedure:1. Perform all before-starting inspections.2. If the engine is equipped with a manual control, ensure that is in the RUN position. Place the transmission in NEUTRAL (and disengage the flywheel clutch, if equipped). For Generator Sets, open the main electrical circuit breaker.2. Move throttle to approximately half engine speed to get the fuel rack to move to the FUEL ON position.3. Turn the starter switch to START (or battery disconnect switch to the ON position) or the Engine Control Switch (ECS) to MAN. START. The starting motor will crank and attempt to start the engine. At temperatures below 0°C (32°F), it may be necessary to spray starting fluid into the air cleaner inlet. Additional injections of ether may be required to start and/or achieve low idle speed.
Excessive ether can cause piston and ring damage. When using starting fluid, follow the manufacturer's instructions carefully, use it sparingly and spray it ONLY WHILE CRANKING THE ENGINE. Failure to do so could result in an explosion and/or fire and possible personal injury.Use ether for cold starting purposes only.
Do not crank the engine for more than 30 seconds.
If a warm engine fails to start within 30 seconds: release the starter switch and wait two minutes to allow the starter motor to cool before using it again.4. As soon as the engine starts, allow the engine to idle for 3 to 5 minutes, or until the water temperature gauge indicator has begun to rise. The engine should run at low idle smoothly until speed is gradually increased to high idle.
Do not increase engine speed until the oil pressure gauge indicates normal. Oil pressure should rise within 15 seconds after the engine starts. If oil pressure is not indicated on gauge within 15 seconds, stop the engine, investigate and correct the cause.
5. Allow white smoke to clear up and proceed with normal operation. Do not apply load to the engine or increase engine speed until the oil pressure gauge indicates normal. Oil pressure should raise within 15 seconds after the engine starts. For starting in cold weather, to minimize white smoke: start the engine and allow the engine to idle for 30 seconds. Increase rpm until engine speed reaches 1200 rpm. Then allow the engine to return to low idle.6. Operate the engine at low load until all systems reach operating temperature. Check all gauges during the warm-up period.Engine Starting With Jumper Cables
When boost starting an engine, follow the instructions to properly start the engine. This engine is equipped with a 12 or 24 volt starting system. Use only equal voltage for boost starting. The use of higher voltage will damage the electrical system.
Batteries give off flammable fumes that can explode.Improper jumper cable connections can cause an explosion resulting in personal injury.Prevent sparks near the batteries. Sparks could cause vapors to explode. Do not allow jumper cable ends to contact each other or the engine.Do not smoke when observing the battery electrolyte levels.Always wear protective glasses when working with batteries.Electrolyte is an acid and can cause personal injury if it contacts skin or eyes.
Engines installed without engine-to-frame ground straps can be damaged by electrical discharge. To prevent electrical discharge damage, check to make sure the engine's electrical system has an engine-to-frame ground strap.For engines which have the alternator connected to an engine component, the ground strap must connect that component to the frame.Some engines have starter-to-frame ground straps. Many of these starters have electrical insulation systems and are not electrically grounded to the engine. For this reason, the starter-to-frame ground strap may not be an acceptable engine ground.When boost starting, refer to the instructions that follow to properly start the engine. Your engine may have a 12 or 24 volt starting system. Only use the same voltage for boost starting. Use of a welder or higher voltage will damage the electrical system and is not recommended.
When using an external electrical source to start your engine: turn the START switch off, remove the key, and turn off all electrical accessories before attaching cables.When using jumper cables always connect the POSITIVE (+) cable to the POSITIVE (+) terminal of battery and the NEGATIVE (-) cable from the external source to the starter NEGATIVE (-) terminal. If not equipped with a starter NEGATIVE terminal, connect to the engine block.Do not reverse the battery cables. The alternator