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Governor HOW TO MEASURE THE PNEUMATIC GOVERNOR IN DIESEL ENGINE

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Please explain what you mean here in more detail ,is this a static generator type engine or a air compressor driven by a diesel engine ?.If i knew more about the problem i may but only may come up a solution

Posted on Jul 15, 2013

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My model 1431 diesel engine can not reach full rpms .and under a load starts dieing until the engine load is released.then trys to rebuild rpms.why.I already replaced the fuel filter.


the operation of a governor system in all pumps is to remain at full throttle until the governor control reaches a predetermined setting
so it is at full throttle when stopped , starts and the governor setting is idle so it runs at idle until you change that setting in which case it moves back towards full throttle again
I explain it like this so that it can be understood that from your description you will see that there is a problem in the governor control system
As governor control is critical in a diesel engine I suggest that you seek a proper diagnosis from an accredited professional diesel pump repair shop as it is very possible that the pump or electronic control will have to be inspected / repaired

Mar 25, 2017 | Cars & Trucks

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At rest, my 1979 Olds Delta 88 diesel won't start and remain in idle unless I rev it up first and then slowly release the gas pedal. Then while driving it, the engine eventually starts to surge and then...


from your description there may be 2 problems
first and simplest is air leaks in the fuel system allowing the fuel to drain back and be replaced by air
the second and more serious which I am inclined to think may be the problem is a faulty/stuck governor system in the pump. Diesel engines start with the governor setting at full throttle which comes back to idle when started. If there is a problem then the governor will be stuck in the idle position at start and so there will be a lack of fuel to start. next by moving the accelerator you are altering the spring tension on the governor which is moving the setting. I would recommend that you take the vehicle to an accredited diesel shop and have test done on the pump and system before you spend too much money.

Jan 20, 2015 | Cars & Trucks

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1981 John Deere 1050 Diesel Tractor - Engine will go to high idle by itself. You can shut key off and engine will eventually die. What would cause the engine to high idle? Afraid engine will lock up.


There are 2 types of governors on diesels. one is controlled from the foot and is fixed speed at the foot setting. The other is variable speed which will run to high idle if the setting is not changed IE on start it will idle ok but if you use a fast setting on a hand throttle say to warm up the motor it will run to high idle. I suggest that if you have not had a problem before then you should have a diesel pump specialist look at it as there may be a fault in the governor control.

Jun 23, 2013 | John Deere Tractor Side Screen...

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Governor does not seem to work


Sometimes the governor gear inside the engine breaks and you have to replace it. Did you try to adjust the governor by putting the throttle full and unloosen the screw on the governor arm and push the governor piece the same direction as the throttle opens and tighten the screw.

Mar 21, 2011 | Briggs & Stratton Briggs Stratton Intek V...

2 Answers

Our 2003 Durango RT will not reverse while in reverse. The car just Idles there. We hear the car switch gears, but nothing happens. What could be problem?


This is one of two things, if the truck goes into drive and moves then you have trany problems and may need to have it rebuilt, if there is no movement in reverse or drive then it could be the transfer case or trany.

Dec 11, 2010 | 2003 Dodge Durango

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2003 Durango, Truck 5.9, Car is intermittently having trouble shifting from 1 - 2nd - reves to ~3 RPM, then lunges into the next gear. I've been doing my homework on the net, but can only find info on...


Possible Cause
The following items may be area of concern:
?¬Other transmission-related DTCs are set.
?¬Solenoid pack connector 5-volt supply circuit open.
?¬Sensor signal circuit has short to ground, short to voltage or open.
?¬Governor pressure sensor defective.
?¬Transmission fluid burnt or oil pan contains excessive debris.
?¬Governor pressure out of range.
?¬Transmission leaking internally.
?¬Defective PCM.
?¬Defective valve body.

Diagnostic Procedure
1.Using scan tool, read DTCs. If good trip counter for DTC P1756 is not displayed or displayed count is not zero, go to step 25. If good trip counter is displayed and displayed count is zero, go to next step.
2.Repair any other transmission-related DTCs before proceeding. If no other transmission-related DTCs exist, go to next step.
3.Check transmission fluid for proper level and for any debris. Fill or repair transmission as necessary. If fluid level and condition are okay, go to next step.
4.Start engine. Allow engine to reach normal operating temperature. Set parking brake, depress brake pedal and place gearshift lever in "D" position. Using scan tool, observe governor pressure sensor pressure. If pressure is greater than 3 psi (.2 kg/cm 2 ), go to next step. If pressure is 3 psi (.2 kg/cm 2 ) or less, go to step 20.
5.Turn ignition off. Install a pressure gauge at transmission governor pressure test port. Start engine. With gearshift lever in "D" position, observe gauge pressure. If pressure is 5 psi (.3 kg/cm 2 ) or more, go to step 23. If pressure is less than 5 psi (.3 kg/cm 2 ), go to next step.
6.Turn ignition off. Disconnect transmission solenoid assembly connector. Turn ignition on. Measure voltage between ground and 5-volt supply circuit at transmission solenoid harness connector terminal No. 2. If voltage is 4.5-5.5 volts, go to next step. If voltage is not 4.5-5.5 volts, go to step 19.
7.Turn ignition off. Disconnect PCM harness connector C2 (White). Measure resistance of governor pressure sensor signal circuit between transmission solenoid harness connector terminal No. 4 and PCM harness connector C2 (White) terminal No. 29. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair governor pressure sensor signal circuit for open.
8.Disconnect PCM harness connector C1 (Black). Measure resistance of sensor ground circuit between transmission solenoid harness connector terminal No. 3 and PCM harness connector C1 (Black) terminal No. 4. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair sensor ground circuit for open.
9.Measure resistance of governor pressure sensor signal circuit between ground and transmission solenoid harness connector terminal No. 4. If resistance is less than 5 ohms, repair signal circuit for short to ground. If resistance is 5 ohms or more, go to next step.
10.Measure resistance between sensor signal circuit and sensor ground circuit at transmission solenoid harness connector terminals No. 3 and 4. If resistance is less than 5 ohms, repair governor pressure sensor circuit for short to sensor ground circuit. If resistance is 5 ohms or more, go to next step.
11.Turn ignition on. Measure voltage of governor pressure sensor signal circuit between ground and transmission solenoid assembly connector terminal No. 4. If voltage is one volt or less, go to next step. If voltage is more than one volt, repair sensor signal circuit for short to voltage.
12.Turn ignition off. Ensure transmission solenoid harness connector is disconnected. Remove transmission oil pan. Disconnect governor pressure/temperature sensor harness connector. Inspect connector and terminals for damage. Repair as necessary. Measure resistance of governor pressure sensor 5-volt supply circuit between governor pressure/temperature sensor harness connector terminal "A" and transmission solenoid harness connector terminal No. 2. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, replace transmission solenoid assembly (internal transmission harness).
13.Measure resistance of sensor ground circuit between governor pressure/temperature sensor harness connector terminal "D" and transmission solenoid harness connector terminal No. 3. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, replace transmission solenoid assembly (internal transmission harness).
14.Measure resistance of governor pressure sensor signal circuit between governor pressure/temperature sensor harness connector terminal "B" and transmission solenoid harness connector terminal No. 4. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, replace transmission solenoid assembly (internal transmission harness).
15.Measure resistance of governor pressure sensor signal circuit between ground and governor pressure/temperature sensor harness connector terminal "B". If resistance is less than 5 ohms, replace transmission solenoid assembly (internal transmission harness). If resistance is 5 ohms or more, go to next step.
16.Measure resistance between governor pressure sensor signal circuit and sensor ground circuit at governor pressure/temperature sensor harness connector terminals "B" and "D". If resistance is less than 5 ohms, replace transmission solenoid assembly (internal transmission harness). If resistance is 5 ohms or more, go to next step.
17.Reconnect transmission solenoid assembly harness connector. Turn ignition on. Measure voltage of governor pressure sensor signal circuit between ground and governor pressure/temperature sensor harness connector terminal "B". If voltage is more than one volt, replace transmission solenoid assembly (internal transmission harness). If voltage is one volt or less, go to next step.
18.Turn ignition off. Using DVOM, backprobe governor pressure sensor signal circuit at PCM harness connector C2 (White) terminal No. 29. Start and idle engine. Place gearshift lever in "N" position. Using scan tool, observe governor pressure sensor voltage. Compare scan tool value with DVOM voltage. If voltages match, replace governor pressure/temperature sensor. If voltages do not match, replace PCM.
19.Turn ignition off. Ensure transmission solenoid harness connector is disconnected. Disconnect PCM harness connector C2 (White). Measure resistance of 5-volt supply circuit between transmission solenoid harness connector terminal No. 2 and PCM harness connector C2 (White) terminal No. 31. If resistance is less than 5 ohms, replace PCM. If resistance is 5 ohms or more, repair 5-volt supply circuit for open.

NOTE: Removing transmission control relay in the following step may set other DTCs. Disregard these DTCs.

Nov 28, 2010 | 2003 Dodge Durango

1 Answer

The govenor rod cannot be adjusted. The springs are intact. Motor revs up but will not idle down. It is 23 HP.


Just guessing here, but if there is no control of the throttle and the engine over revs, then more than likely the governor control is broke. Briggs if famous for that problem. Governor is around 25 dollars and a lower crankcase gasket. Requires the engine to be pulled, lower crankcase removed, remove all pieces of old governor and then re assemble with new governor and gasket.////Before doing all this check that both springs are on the governor on the exterior of motor. If you manually hold the governor arm back, counterclockwise, and it still revs, then you need to replace governor. Don't let it rev for long or it with throw a pushrod or worse. good luck

Sep 22, 2010 | Briggs & Stratton Briggs Stratton Intek V...

2 Answers

Motor runs wide open when set @ slow speed


It could be that the governor spring has become disconnected or has broken on an end where it hooks onto the throttle linkage. If the spring is OK & throttle linkage is not binding it could mean the governor drive inside the engine has failed preventing the governor from operating correctly. You may need to take the engine to a mechanic to fix the problem.

Sep 15, 2010 | Briggs & Stratton Briggs Stratton Intek V...

1 Answer

Tecumseh engine #143.985510 - carb linkage hook-up


Hello:

The Carbuertor Throttle is Held in the Full Open Position Until the Engine is Started and Running, then the Governor and Spring Work together to Keep the Engine RPMs to the Desired Setting.
The Following is an Explaination on How the Governor System on Small Engines Function.
>>The Governor System behaves like an Unending Tug of War between One of Two Governor Springs, which Pull the Throttle Toward the Open Position, and a Spinning Crankshaft, which Tries to Close the Throttle. When the Load on the Engine Increases - a Typical Example is when you Move your Running Lawn Mower from the Driveway to the Grass - Crankshaft Revolutions Drop. But the Governor Spring is Still Tugging, Causing the Throttle Plate to Open. In Response, a Larger Volume of Air-Fuel Mixture Enters the Carburetor, Increasing Engine Speed to Compensate for the Increased Load. The Crankshaft Speeds Up, and the Tug of War Resumes, until a New Equilibrium is Achieved. With Each Change in Load, the Tension Between the Governor Spring and the Load Brings about a New Equilibrium, known as the Engine's Governed Speed. Neither Side Wins until the Engine is Shut Off. At that Point, without the Crankshaft Spinning, the Governor Spring Pulls the Throttle to the Wide-Open Position. Two Types of Governors are Common on Small Engines - Mechanical and Pneumatic.
Please, Do Not Hesitate, If you Hit a Snag or this Does Not Correct the Problem, I am Here if You Require More Assistance.
Hope this Helps. Let me Know What Happens, Please. May the All Mighty Bless You and Yours. Be Safe and Be Happy. Thanks.

Good Luck

Respectfully

jbridger (John)

May 13, 2009 | Garden

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