816837 2 Mariner SPARK PLUG(NGK#BPZ-8H-N-10-CAN/BEL.) 6/8/9.9 H.P.

Idling
Avoid excess idling. If the truck is parked for more than five minutes, STOP the engine. An engine can burn from 2.8 to 5.7 L (.7 to 1.5 US gal) of fuel per hour while idling. Excessive idling can cause excessive carbon build-up and/or slobber, which is harmful to the engine.If extended idle time is required, control the engine speed to 1000 rpm or greater and take steps to ensure that the coolant temperature exceeds 82°C (180°F). Contact your Caterpillar dealer for assistance.Caterpillar truck engines do not require long warm-up times that waste fuel. It takes just a few minutes in the summer and a bit longer in the winter to warm up the engine. A load can be applied to the engine after normal oil pressure is achieved and the coolant water temperature gauge begins to rise.Getting Started
Begin operating the engine at low load. After normal oil pressure is reached and the temperature gauge begins to move, the engine may be operated at full load.To get the vehicle in motion, use a gear that will result in a smooth, easy start to move the load without increasing engine speed above low idle or slipping the clutch. Engage the clutch smoothly. Interrupted slipping and abrupt clutch engagement put stress on the drive train and waste fuel.Use progressive shifting techniques. Progressive shifting improves fuel economy.* Keep engine rpm to a minimum [low to mid rpm range (1200 to 1600 rpm)]* Use only enough rpm to pick up the next gearProgressive shifting also reduces acceleration time. Top gear is reached sooner because it takes less time to synchronize gears during shifting and the engine is operating at its highest torque range. Experience with your truck will show you how much rpm is required to make upshifts under various conditions.Top gear is reached sooner because it takes less time to synchronize gears during shifting and the engine is operating at its highest torque range. Experience with your truck/vehicle will show you how much rpm is required to make upshifts under various conditions.If the truck/vehicle can be operated in a higher gear after the desired speed is reached, select the highest gear available that will pull the load. By following this recommendation, you will lower your fuel costs. Your engine will be operating at the lowest rpm required to pull the load.Cruising
The faster a truck is driven, the more fuel it will consume. Increasing cruising speed from 88 to 104 km/h (55 to 65 mph) will increase fuel consumption of a typical Class 8 truck approximately 0.4 km/L (1 mpg). Driving faster to increase stop time makes those stops very expensive. Cruising time provides the greatest opportunity to benefit from operation in the most efficient rpm range of the engine (1200 to 1600 rpm).Cruise Control
Depending on truck manufacturer, the cruise control switch may be programmed to operate in one of two modes:1. The SET position may operate as SET/ACCEL or SET/DECEL.2. The RESUME position may operate as RESUME/ACCEL or RESUME/DECEL.Refer to the markings on the switch or refer to your Truck Owners Manual. To set the Cruise Control:1. After you accelerate to the desired speed, turn the ON/OFF switch ON.2. Press the SET/RESUME switch to the SET position.It is also possible to accelerate to the desired speed by pressing the SET/RESUME switch to the ACCEL position.The cruise control system will control the truck speed until the clutch or service brake pedal is depressed or the ON/OFF switch is turned OFF. To resume speed after an after an interruption:* Press RESUME and the truck will return to the "set" speed.Momentarily pressing or "bumping" the SET/RESUME switch to the ACCEL position will increase vehicle speed by one mph. Press the switch to the DECEL position to decrease speed by one mph.With the Cruise Control ON/OFF switch in the ON position, Engine Retarder operation is initiated by depressing the service brake. The retarder will either turn off after the service brake is released or the retarder will remain on after the service brake is released. Refer to the publications for your type of auxiliary engine brake.Uphill Operation
For optimum performance, allow the engine to lug down to 1100 to 1350 rpm before downshifting. Continue to downshift in this manner until you reach a gear that maintains the desired speed. Continue to operate at low (1100 to 1350) rpm if the truck will make it to the top without a downshift. Begin upshifting as the grade of the hill decreases and the engine begins to accelerate above 1600 rpm. Driving this way will provide optimum fuel economy and performance! Allowing the engine to lug below peak torque is permissible if the truck is cresting the top of a hill. However, extended operation at engine speeds below peak torque (usually 1200 rpm) will raise exhaust temperature and cylinder pressure. This can lead to reduced engine service life.Downhill Operation
Do NOT allow the engine rpm to exceed 2300 rpm, engine damage can result.If equipped with an exhaust or compression brake, do not exceed 2100 rpm.
On a downgrade, do not coast with the clutch pedal depressed or put the transmission in NEUTRAL. If you do not want to use power, disengage the Cruise Control.Select the correct gear that does not allow the engine speed (rpm) to exceed 2300 rpm and use the retarder and/or service brakes to control the speed of the truck. A basic rule is to select the same gear that would be required to go up the grade.Saving Fuel
Rolling hills provide great opportunity to reduce fuel consumption. Avoid downshifting on small hills. Even if the engine must be lugged to speeds below peak torque the truck should not be downshifted. When going down hill, use gravity instead of engine power to regain truck speed.On grades that require more than one downshift, let the engine lug to peak torque rpm. If road speed stabilizes with the engine running at or above peak torque rpm, remain in that gear. Long steep down grades should be anticipated. Truck speed