F85210 STUD Force
H0700H79A, H0709B79A, H0750H79A, H0756H80F, H0756H81G, H0756H82H, H0757B79E, H0757H75A, H0757H76C, H0757H78D, H0758H80B, H0758H82E, H0759H79A, H0850H79A, H0850H80A, H0850H81C, H0851H79A, H0851X88A, H0853F88B, H0853F89C, H0853F89E, H0853F89F, H0853F89
STUD
Price: query
Rating:
Compatible models:
H0700H79A
H0709B79A
H0750H79A
H0756H80F
H0756H81G
H0756H82H
H0757B79E
H0757H75A
H0757H76C
H0757H78D
H0758H80B
H0758H82E
H0759H79A
H0850H79A
H0850H80A
H0850H81C
H0851H79A
H0851X88A
H0853F88B
H0853F89C
H0853F89E
H0853F89F
H0853F89G
H0855H79A
H0856A89A
H0856A89H
H0856B80H
H0856C87A
H0856C87B
H0856F84A
H0856F85A
H0856F86A
H0856H82K
H0856L89D
H0856Y89B
H0857B78F
H0857H79G
H0858B80C
H0858B82E
H0858C84H
H0859B79B
H0859H77A
H0859H78A
H085LD89A
H085LD89B
H085LD89C
H0903E91D
H0903F90B
H0903F90C
H0903F91A
H0903F91C
H0906A90A
H090LD90A
H090LD90B
H090LD90C
H090LD91D
Force
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- POWERHEAD » F85210
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- POWERHEAD » F85210
- POWERHEAD » F85210
- POWERHEAD » F85210
- POWER HEAD » F85210
- POWER HEAD » F85210
- POWER HEAD » F85210
- POWER HEAD » F85210
- POWER HEAD » F85210
- POWERHEAD » F85210
- POWER HEAD » F85210
- POWER HEAD » F85210
- POWER HEAD » F85210
- POWERHEAD » F85210
- POWERHEAD » F85210
- POWERHEAD » F85210
- POWERHEAD » F85210
- POWERHEAD » F85210
- POWERHEAD » F85210
- POWER HEAD » F85210
- POWER HEAD » F85210
- POWER HEAD » F85210
- POWER HEAD » F85210
- POWERHEAD » F85210
- POWERHEAD » F85210
- POWERHEAD » F85210
- POWER HEAD » F85210
- POWER HEAD » F85210
- POWER HEAD » F85210
- POWER HEAD » F85210
- POWER HEAD » F85210
- POWER HEAD » F85210
- POWER HEAD » F85210
- POWER HEAD » F85210
- POWER HEAD » F85210
- POWER HEAD » F85210
- POWER HEAD » F85210
- POWER HEAD » F85210
- POWER HEAD » F85210
- POWER HEAD » F85210
- POWER HEAD » F85210
- POWER HEAD » F85210
Information:
Introduction
The engine control governor is failing to keep the engine RPM steady on certain 3300/3400 gensets. The following tips will help resolve engine surge problems on mechanical governed 3300/3400 gensets.Fuel System Gumming Caused by Periods of Extended Shutdown
Tip A: Proper preventive maintenance for standby generator sets will prevent gumming caused by shutdown.
Refer to Operations and Maintenance Manual, SEBU6042, "Maintenance Management Schedules For Recommended Preventive Maintenance".Tip B: Recommended procedures for resolving fuel gumming issues in the field caused by extended storage time.
Case 1: Long engine storing time (greater than six months).
Remove governor. Refer to Field Repair Manuals for additional information.Note: With governor removed, de-gum or clean the tach shaft, load stop shaft, and Servo Assembly. Settings of the governor should not change.
Remove plunger and barrel assembly (one at a time).
De-gum plunger and barrel assembly with alcohol (or suitable substitute).
Wet the plunger and barrel assembly with a small amount of light oil or fuel.
Re-install the plunger and barrel assembly.
Check the rack movement. Repeat Steps 1.b and 1.e until you have free rack movement.
Re-install the governor. The settings for the governor may have to be verified.
Case 2: Moderate engine storage time (greater than four months).
Remove the fuel gallery cover.
Wet each plunger and assembly with alcohol, high-grade fuel, or a suitable substitute. Ensure that alcohol is applied to the hollow dowels that are the fill ports for the fuel.
Rotate the engine crankshaft at least 180°. Repeat Step 2.b twice.
Re-install the gallery cover.
Prime engine with high-grade fuel. Settings of the governor should not change.
Case 3: Short engine storage time (greater than two months).
Prime the fuel system with high-grade fuel.
Start the engine. Run the engine with aggressive low to high throttle exercise.Dashpot Settings and Proper Procedural Adjustment
Tip A: Correction of 3306/3406 standby generator set engines that may go into overspeed during startup (when equipped with dashpot governor arrangements).Discussion
This is a correctable problem that is somewhat characteristic of 3306 and 3406 governors. The oil drains from the dashpot when the engine has been idle for an extended period of time. As the engine cranks, oil is drawn into the dashpot by the moving dashpot plunger. Oil pressure is not an issue because the dashpot plunger draws unpressurized oil from a cavity in the governor housing. If the dashpot does not fill before the engine reaches 1500 RPM, the engine could run-up to the control system's overspeed trip limit and shutdown.To alleviate this problem in the past, dealers have used the following methods:
Used heating blankets in order to keep the governor warm
Changed to a lower viscosity oil
Installed a five-second timer to delay the energize-to-run solenoid from actuatingThe five-second delay provides five seconds of cranking time before the engine starts. These five seconds allow the dashpot time to fill.If equipped, the 1724 Actuator Linkage can be moved to the shutoff lever (with modifications to the linkage arrangements). The 1724 would then be able to hold the speed down when the Caterpillar governor goes unstable during startup (before there is enough oil in the dashpot). A jumper would also need to be added so that the engine goes straight to high idle upon startup. This jumper should be connected to Terminal 9 and Terminal 10 on the Woodward 8290 Control. This is the easiest fix for critical standby applications.If the unit does not have the 1724 option, add the timer (refer to the Solution Section below. Also confirm that the dashpot check valve is not reversed. Note: The dashpot check valve is used only on 3304 and 3306 models.The dashpot check valve allows you to draw oil into the governor's dashpot during cranking so that the dashpot is full before the engine reaches 1500 RPM. The dashpot will fill slower than normal under the following conditions:
The needle valve is adjusted so that it is nearly closed
The oil is cool/cold and of relatively heavy weightThe needle valve should be turned clockwise until it is completely closed. When the needle valve is completely closed (all the way in), back the valve out (counter-clockwise) anywhere between one-half and two full turns. Ensure that you are using the correct oil and that the needle valve is adjusted correctly. Note: Certain emissions-certified arrangements have a Woodward 524 Actuator. The Woodward 524 Actuator is used to override the Caterpillar governor via the shutoff linkage. This is not a problem on 3304 and 3306 models equipped with a dashpot check valve because the actuator controls the rack.Tip B: Check 3306B generator set engine for proper dashpot screw adjustment.
For 3306B dashpot screw adjustment, refer to Testing and Adjusting, RENR1287, "3306B Generator Set Engine".Solution
Perform the following steps for Solutions that can be administered for non-critical standby applications.
The high voltage that is produced by an operating generator set can cause severe injury or death. Before performing any maintenance or repairs, ensure that the generator will not start.Place the engine control switch in the "OFF" position. Attach "DO NOT OPERATE" tags to all starting controls. Disconnect the batteries or disable the starting system. Lock out all switchgear and automatic transfer switches that are associated with the generator.
Lockout genset. Disconnect battery power to the control panel.
Install the 3N-7817 Relay Track in the EMCPII Control Panel Subpan. Mount the 3N-5978 On Delay Timer As onto the 3N-7817 Relay Track .
Position the 9Y-2921 Relay onto the subpan. Drill the appropriate mounting holes. Use sheetmetal screws to secure the 9Y-2921 Relay to the subpan.
Wire the 9Y-2921 Relay and the 3N-5978 On Delay Timer As . For EMCPII Control Panels, refer to Illustration 1. For Electomechanical Control Panels, refer to Illustration 2.
Set the timer for a five or six second delay.
Reconnect the power source. Return the unit to service.
Illustration 1 g01047021
EMCPII Control Panel
Illustration 2 g01047022
Electromechanical Control PanelEnsuring That All Governor Throttle Linkage Joints Are Free
Tip A: Visually inspect governor throttle linkage joints to ensure that all are properly lubricated and have free range of movement.
The engine control governor is failing to keep the engine RPM steady on certain 3300/3400 gensets. The following tips will help resolve engine surge problems on mechanical governed 3300/3400 gensets.Fuel System Gumming Caused by Periods of Extended Shutdown
Tip A: Proper preventive maintenance for standby generator sets will prevent gumming caused by shutdown.
Refer to Operations and Maintenance Manual, SEBU6042, "Maintenance Management Schedules For Recommended Preventive Maintenance".Tip B: Recommended procedures for resolving fuel gumming issues in the field caused by extended storage time.
Case 1: Long engine storing time (greater than six months).
Remove governor. Refer to Field Repair Manuals for additional information.Note: With governor removed, de-gum or clean the tach shaft, load stop shaft, and Servo Assembly. Settings of the governor should not change.
Remove plunger and barrel assembly (one at a time).
De-gum plunger and barrel assembly with alcohol (or suitable substitute).
Wet the plunger and barrel assembly with a small amount of light oil or fuel.
Re-install the plunger and barrel assembly.
Check the rack movement. Repeat Steps 1.b and 1.e until you have free rack movement.
Re-install the governor. The settings for the governor may have to be verified.
Case 2: Moderate engine storage time (greater than four months).
Remove the fuel gallery cover.
Wet each plunger and assembly with alcohol, high-grade fuel, or a suitable substitute. Ensure that alcohol is applied to the hollow dowels that are the fill ports for the fuel.
Rotate the engine crankshaft at least 180°. Repeat Step 2.b twice.
Re-install the gallery cover.
Prime engine with high-grade fuel. Settings of the governor should not change.
Case 3: Short engine storage time (greater than two months).
Prime the fuel system with high-grade fuel.
Start the engine. Run the engine with aggressive low to high throttle exercise.Dashpot Settings and Proper Procedural Adjustment
Tip A: Correction of 3306/3406 standby generator set engines that may go into overspeed during startup (when equipped with dashpot governor arrangements).Discussion
This is a correctable problem that is somewhat characteristic of 3306 and 3406 governors. The oil drains from the dashpot when the engine has been idle for an extended period of time. As the engine cranks, oil is drawn into the dashpot by the moving dashpot plunger. Oil pressure is not an issue because the dashpot plunger draws unpressurized oil from a cavity in the governor housing. If the dashpot does not fill before the engine reaches 1500 RPM, the engine could run-up to the control system's overspeed trip limit and shutdown.To alleviate this problem in the past, dealers have used the following methods:
Used heating blankets in order to keep the governor warm
Changed to a lower viscosity oil
Installed a five-second timer to delay the energize-to-run solenoid from actuatingThe five-second delay provides five seconds of cranking time before the engine starts. These five seconds allow the dashpot time to fill.If equipped, the 1724 Actuator Linkage can be moved to the shutoff lever (with modifications to the linkage arrangements). The 1724 would then be able to hold the speed down when the Caterpillar governor goes unstable during startup (before there is enough oil in the dashpot). A jumper would also need to be added so that the engine goes straight to high idle upon startup. This jumper should be connected to Terminal 9 and Terminal 10 on the Woodward 8290 Control. This is the easiest fix for critical standby applications.If the unit does not have the 1724 option, add the timer (refer to the Solution Section below. Also confirm that the dashpot check valve is not reversed. Note: The dashpot check valve is used only on 3304 and 3306 models.The dashpot check valve allows you to draw oil into the governor's dashpot during cranking so that the dashpot is full before the engine reaches 1500 RPM. The dashpot will fill slower than normal under the following conditions:
The needle valve is adjusted so that it is nearly closed
The oil is cool/cold and of relatively heavy weightThe needle valve should be turned clockwise until it is completely closed. When the needle valve is completely closed (all the way in), back the valve out (counter-clockwise) anywhere between one-half and two full turns. Ensure that you are using the correct oil and that the needle valve is adjusted correctly. Note: Certain emissions-certified arrangements have a Woodward 524 Actuator. The Woodward 524 Actuator is used to override the Caterpillar governor via the shutoff linkage. This is not a problem on 3304 and 3306 models equipped with a dashpot check valve because the actuator controls the rack.Tip B: Check 3306B generator set engine for proper dashpot screw adjustment.
For 3306B dashpot screw adjustment, refer to Testing and Adjusting, RENR1287, "3306B Generator Set Engine".Solution
Perform the following steps for Solutions that can be administered for non-critical standby applications.
The high voltage that is produced by an operating generator set can cause severe injury or death. Before performing any maintenance or repairs, ensure that the generator will not start.Place the engine control switch in the "OFF" position. Attach "DO NOT OPERATE" tags to all starting controls. Disconnect the batteries or disable the starting system. Lock out all switchgear and automatic transfer switches that are associated with the generator.
Lockout genset. Disconnect battery power to the control panel.
Install the 3N-7817 Relay Track in the EMCPII Control Panel Subpan. Mount the 3N-5978 On Delay Timer As onto the 3N-7817 Relay Track .
Position the 9Y-2921 Relay onto the subpan. Drill the appropriate mounting holes. Use sheetmetal screws to secure the 9Y-2921 Relay to the subpan.
Wire the 9Y-2921 Relay and the 3N-5978 On Delay Timer As . For EMCPII Control Panels, refer to Illustration 1. For Electomechanical Control Panels, refer to Illustration 2.
Set the timer for a five or six second delay.
Reconnect the power source. Return the unit to service.
Illustration 1 g01047021
EMCPII Control Panel
Illustration 2 g01047022
Electromechanical Control PanelEnsuring That All Governor Throttle Linkage Joints Are Free
Tip A: Visually inspect governor throttle linkage joints to ensure that all are properly lubricated and have free range of movement.
Parts stud Force:
F433209
F433209 STUD, THROTTLE CAM
H0202H79K, H0252H77B, H0252H78C, H0252H78D, H0254H75A, H0352H77H, H0356H75F, H0456B78J, H0456B79K, H0456B80L, H0507H81A, H0555H74G, H0559H77H, H0559H77J, H0757H75A, H1059H76D, H1209H76F
F66480
F66480 STUD
H0032H84G, H0042081C, H0042082D, H0042083E, H0042B78C, H0042B80G, H0042C84L, H0042C87A, H0042H77B, H0042H78D, H0042H78E, H0042H79F, H0043F85A, H005201RS, H0052C88A, H0054H76D, H0060B76A, H0060B78B, H0060H79C, H0060H80D, H0062B78J, H0062H79K, H0062H79
F316165
F316165 STUD, GEAR HOUSING CENTER
H0700H79A, H0709B79A, H0750H79A, H0757B79E, H0757H75A, H0757H76C, H0757H78D, H0759H79A, H1059H76D, H1209H76F
F85006-1
F85006-1 STUD, GEAR HOUSING, FRONT
H0700H79A, H0709B79A, H0750H79A, H0757B79E, H0757H75A, H0757H76C, H0757H78D, H0759H79A, H1059H76D, H1209H76F
F84008-3
F85859
F85859 STUD, FORWARD
H0700H79A, H0709B79A, H0750H79A, H0756H80F, H0756H81G, H0756H82H, H0757B79E, H0757H75A, H0757H76C, H0757H78D, H0758H80B, H0758H82E, H0759H79A, H0850H79A, H0850H80A, H0850H81C, H0851H79A, H0851X88A, H0853F88B, H0853F89C, H0853F89E, H0853F89F, H0853F89
F85211
F85211 STUD, REAR
H0700H79A, H0709B79A, H0750H79A, H0756H80F, H0756H81G, H0756H82H, H0757B79E, H0757H75A, H0757H76C, H0757H78D, H0758H80B, H0758H82E, H0759H79A, H0850H79A, H0850H80A, H0850H81C, H0851H79A, H0851X88A, H0853F88B, H0855H79A, H0856A89A, H0856B80H, H0856C87
F694210
F694210 STUD
H0853F89F, H0853F89G, H0856A89H, H0856L89D, H085LD89A, H085LD89B, H085LD89C, H0903E91D, H0903F90B, H0903F90C, H0903F91A, H0903F91C, H0906A90A, H090LD90A, H090LD90B, H090LD90C, H090LD91D, H120LD90A, H120LD90B, H120LD90C, H120LD91B, H120LD91D, H120LD92