0311751 JOHNSON SCREW,Cover,inner to cyl.

These devices should not be used as a primary or service brake.
Certain auxiliary engine braking devices are approved for use on these engines. Refer to the Truck Engine Application and Installation Guide or see your Caterpillar dealer for more information.BrakeSaver Operation (3406E Only)
The BrakeSaver should NOT be used as a primary or service brake. The BrakeSaver is not an emergency or quick stop brake. Use the service brakes for quick stops.
Do not exceed 116°C (240°F) maximum engine oil temperature at any time.Do not exceed 2300 rpm in any situation. Operation of the engine over 2300 rpm will cause the Electronic system to activate the CHECK ENGINE lamp, indicating engine overspeed. Overspeeding can result in serious damage to your engine.
The BrakeSaver provides auxiliary braking to slow the truck and to control speed on long downhill grades. Controlling the slowing or downhill speed of a vehicle by using the BrakeSaver results in reduced wear on brake linings and brake drums. It helps save the service brakes for emergency stopping requirements.No special skills are required to operate or maintain a vehicle equipped with a BrakeSaver. However, it requires the operator to observe the engine speed and BrakeSaver oil temperature.For maximum BrakeSaver effectiveness, select the proper gearing to keep the engine rpm as close to 2300 rpm as possible without exceeding 2300 rpm. BrakeSaver effort declines as rpm goes down.Manual operation allows the operator to match driving conditions to any load or hill. Do not control the vehicle speed with the accelerator while the manual control is ON. Allow a two second delay for full engagement and full disengagement.Manual Control
Manual control lever.The hand operated manual control lever is usually mounted on the steering column. To increase or decrease the BrakeSaver, move the manual control lever. Allow a two second delay for full engagement and full disengagement. Actuating the manual Brakesaver control will deactivate the cruise control or the PTO control.Automatic Control
The mode selector switch must be in the AUTOMATIC MANUAL position and the Electronic system Cruise Control ON/OFF switch must be in the OFF position for automatic control. In this mode, the BrakeSaver will automatically be engaged when the clutch pedal is applied and the accelerator pedal is released.The BrakeSaver will automatically shut off when the clutch pedal is released or when the accelerator pedal is pressed. It will engage when the clutch pedal is applied again and the accelerator pedal is released.Gauges
CONTROL AIR PRESSURE should not exceed 390 kPa (55 psi). If the indicator shows little or no pressure, the BrakeSaver may not provide any braking effort. Control the vehicle stopping with proper downshifting and service brakes until repairs are made. Stop the vehicle or operate at a reduced speed.The BrakeSaver oil temperature gauge indicator should register in the NORMAL (GREEN) range, less than 116°C (240°F). If the indicator moves to the RED range, place the BrakeSaver manual control lever to the OFF position. Operate the vehicle with the service brakes only, or stop the vehicle and let the engine idle until the oil temperature registers in the NORMAL range.To prevent unnecessary fuel consumption and possible heat buildup, do not leave the BrakeSaver activated when the engine is idling while parked. Place the control selector switch in MANUAL position, and the manual control lever in the OFF position.Compression Brake
The compression brake controls may include a dash mounted module or an ON/OFF switch and a three position "LO," "MED" and "HI" switch. The compression brake control setting depends on how many cylinders of braking are desired.Some applications are equipped with a multiposition switch to provide variable retarding capability. Operators should become familiar with the controls on their vehicles. Refer to the Truck or OEM Owners Manual for the type of operating controls that your truck is equipped with.Refer to the Truck Engine Application and Installation Guide or the Service Manual for more information.Uphill Operation
For optimum performance, allow the engine to lug down to 1100 to 1200 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 1200) 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 simple 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 should be reduced before cresting the top of a hill and proceeding down a long steep grade. The way to achieve maximum fuel efficiency is to minimize the amount of braking that is used to maintain a safe speed.The engine's ability to