812768 Mercury ROLLER BEARING

Illustration 1 g00725429
The left side of the C-15 truck engine is shown. (1) Vehicle harness connector J1/P1 (2) Engine harness connector J2/P2 (3) Engine Control Module (ECM) (4) ECM side of vehicle harness connector P1 (5) Side view of vehicle harness connector P1 (6) Harness side of vehicle harness connector P1Considerations for the Installation
The switches labeled "PTO Interlock" in the schematics are redundant and should be added to ensure the engine is put in PTO mode only when the vehicle and operator are prepared for safe PTO operation. The interlocks must prevent operation of the engine PTO until the PTO operator is expecting it and is prepared. These switch(es) may be (parking brake switch or other switches) available as an interlock and are required for the application.
It is the installer and the vehicle owner's responsibility to determine the necessary interlocks for the the PTO system and to provide the PTO operator with the operating instructions. Failure to do so may cause vehicle/equipment damage.
PTO Switch On Lamp
The PTO switch On lamp should be installed in the cab. If the PTO operating station is outside of the cab, a lamp should also be installed at the operating station. This lamp will provide an indication to the driver/PTO operator when the PTO On/Off circuit is ON. Refer to the appropriate diagrams for the application. The "PTO switch On lamp" parameter must be programmed to J1/P1:30 in order for Output 1 to illuminate the PTO switch On lamp when the PTO On/Off switch is in the ON position. If the "PTO Configuration" is programmed to Cab Switches, then refer to Illustrations 4 and 5. If the "PTO Configuration" is programmed to "Remote Switches", then refer to Illustrations 6 and 7. If the "PTO Configuration" is programmed to "Remote Throttle", then refer to Illustrations 8 and 9.The "PTO Configuration" is Programmed to "Remote Switches" or to "Remote Throttle"
The components that follow are ignored when the PTO On/Off circuit is in the ON position. The "PTO Configuration" must also be programmed to "Remote Switches" or to "Remote Throttle": accelerator pedal position sensor for the cab, clutch switch, service brake switch and cruise control switches. A PTO Switch On lamp is recommended in both the cab and at the remote station in order to indicate when the PTO On/Off circuit is ON. The Parking Brake Switch and/or a Transmission Neutral Switch causes the engine to return to the "Low Idle Engine RPM". The engine will return to the "Low Idle Engine RPM" if someone tries to move the vehicle and the operator of the PTO is at the remote location. The "Idle/PTO Vehicle Speed Limit" should also be programmed to the minimum 1 km/h (1 mph) in order to cause the engine to return to low idle if the vehicle is moved.Engine Shutdown Switch
If an engine shutdown switch is desired, then the switch should be connected to a Normally Closed Relay. Refer to Schematic 2 for an example. The actual location of the switch should be readily accessible to the operator of the PTO during PTO operation.Schematic for the Engine Shutdown Switch
Illustration 2 g00627399
Schematic for the engine shutdown switch for a full feature systemPTO Interlocks for Transmission Driven PTO
Any PTO Configuration
Vehicles that use a transmission driven PTO require an additional Parking Brake Interlock Switch for the PTO On/Off circuit. The interlock will prevent PTO operation if the Parking Brake is not set.
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Schematic for the PTO Interlock for transmission driven PTOInstallation for Three PTO Configurations
The "PTO configuration" provides three programmable options:
"Cab switches"
"Remote switches"
"Remote throttle"The information in this section provides details on the installation of the necessary components that are required for the various options for the "PTO configuration"."Cab Switches" PTO Configuration
No splicing into the existing cab wiring is necessary. The Cruise Control Set/Resume Switch is used for PTO Operation, Cruise Control, and Extended Idle. The function of the Set position and Resume position is determined by the programming of the following parameters: "PTO Engine RPM Set Speed", "Cruise/Idle/PTO Switch Configuration" and "Idle/PTO Bump RPM"The Set position becomes the RPM increase position and the Resume position becomes the RPM decrease position if the "PTO Engine RPM Set Speed" is programmed above 0 rpm. If the "PTO Engine RPM Set Speed" is programmed to 0 rpm, then the Set position can provide either the ACCEL or the DECEL function and the Resume position can provide either the DECEL function or the ACCEL function. A programmable bump rpm is determined by the "Idle/PTO Bump RPM" parameter.Note: A Neutral Switch (Input 12, J1/P1 terminal-62) is required for PTO operation if the PTO Configuration is programmed to "Cab Switches" and the "Transmission Style" is programmed to one of the following options: "Automatic Option 3" and "Automatic Option 4".
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"Cab Switches" for "PTO Configuration" (A) Set/Resume switch (B) PTO On/Off switch (C) PTO Switch On lamp (D) ECM side of vehicle harness connector J1 (E) Harness side of vehicle harness connector P1 (3) "Input sensor common 2" (30) "Output 1" (PTO Switch On lamp) (56) "Input 1" (PTO On/Off switch)
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