8833A11 Mercury GEAR HOUSING, COMPLETE (SHORT) (GRAY)

No special skills are required to operate a vehicle with a BrakeSaver. However, it requires the operator to observe the engine speed and the BrakeSaver oil temperature.
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.
The BrakeSaver provides auxiliary braking to slow the truck and to control speed on long grades. Governing the deceleration 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.Braking effort is a direct function of engine speed. The greater the engine speed the greater the braking effort. This applies to all engines, especially those with slower speed economy ratings.The BrakeSaver utilizes the engine oil and cooling systems, which eliminates the need for auxiliary oil or cooling systems.Scheduled maintenance on the BrakeSaver, or additional engine maintenance, is not required.Trucks equipped with the BrakeSaver require an additional amount of engine lubricating oil. Refer to the Refill Capacities chart in this publication for proper amount of oil required for a BrakeSaver equipped engine.Manual Control
The hand-operated control lever is usually mounted on the steering column. It provides a smooth modulated application of the BrakeSaver for desired retarding of the vehicle up to 2300 engine rpm.This controlled modulation of the BrakeSaver is especially desirable on slippery roads. Increasing or decreasing the BrakeSaver action is accomplished by moving the control lever. Actuating the manual Brakesaver control will deactivate the Electronic engines' Cruise Control or 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 applied when the clutch is engaged and the accelerator pedal is released.The BrakeSaver will automatically shut off when the clutch is disengaged or when the accelerator pedal is depressed. It will engage again when the clutch is re-engaged and the accelerator pedal is released.Gauges
The BrakeSaver CONTROL AIR PRESSURE gauge indicates the pressure at the BrakeSaver control valve. Air pressure should not exceed 50 psi (345 kPa).If the indicator shows reduced or no pressure, the BrakeSaver may not provide any braking effort. Stop the vehicle or operate at a reduced speed.Control vehicle stopping with proper downshifting and service brakes until proper repairs are made.The BrakeSaver oil temperature gauge indicator should register in the NORMAL (GREEN) range, 240°F (116°C). If the indicator moves to the RED range, move 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.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. The Electronic system TEL (Top Engine Limit) is normally set at rated rpm (plus) +20 rpm.Manual operation adds modulation to the BrakeSaver control and 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.To prevent unnecessary fuel consumption and possible heat build-up, 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.Driver Operational Checks
There are two quick operational checks the operator can make to determine if the BrakeSaver is operating properly.This also ensures that the control valve spool is operating freely in the control.To check retarding power if equipped with an Electronic Engine:
* Place the transmission in NEUTRAL with the vehicle parked.* Run the engine at TEL with accelerator pedal control.* Engage the BrakeSaver fully.* The engine speed should decrease to Engine RPM at VSL (if programmed) and the CHECK ENGINE/DIAGNOSTIC lamp should turn ON. If Engine RPM at VSL is not programmed, the CHECK ENGINE/DIAGNOSTIC lamp should turn ON, but engine rpm will not decrease.
The engine should not run against the BrakeSaver for more than 15 seconds. Allow five minutes between applications to prevent the cooling system from overheating.
To check retarding power if equipped with mechanical engine:
* Place the transmission in NEUTRAL with the vehicle parked.* Run the engine at high idle rpm with accelerator pedal control.* Engage the BrakeSaver fully.* The engine speed should decrease approximately 125 25 rpm (5 to 6% on a 2100 rpm rated engine). The engine speed drop will be less on a lower rated engine.
The engine should not run against the BrakeSaver for more than 15 seconds. Allow five minutes between applications to prevent the cooling system from overheating.
To check control valve spool free movement:
* Start the engine and run it until the air system is at maximum pressure (50 psi [345 kPa]).* Stop the engine and engage the BrakeSaver before the air pressure drops below the maximum pressure.* Disengage the BrakeSaver and listen for a "klunk" sound. This "klunk" sound is the control valve hitting the control valve end cover.This indicates that the control valve is free, the control springs are operating normally and that the air is venting properly from the control valve.