Ford 801 Crankshaft balancer?

Ryker Wells

New User
Hi there,

I am in the process of rebuilding a Ford 801 diesel engine. My father had spun a bearing due to lack of oil and we are just trying to get it back in the field. We had the crank rod journals turned I believe .20 under and trued up the rods. I have put the motor back together and am at the point of putting on the crank balancer... I have never seen anything like this on an engine before and I'm not sure how to install it? does it need to be set at a specific spot on the gear? or is everything already balanced? Also I noticed that the machine shop had taken a few chunks out of the counter weights and drilled a few holes... Did they need to balance the crank with this balancer? do I still even need it? I have read a few posts about these balancers and now I am worried that I shold not have allowed the crank to be balanced?

Any help or information that could help me get this tractot back up and running would be very appreciated.

Thanks,

RW
 
I also just noticed that there are two dots on the balancer one on each gear... and on the gear that makes contact with the crank gear there is an additional tick mark (not a dot). The crank gear has a dot.... I would assume that I need to line up the dots (or tick mark/dot). Would I be safe in assuming that the two dots on the gears of the balancer need to line up (they already do, I never took them apart) and that the additional Tick mark lines up with the crank? Or should I align the dot on the balancer with the crank dot?

Thanks again in advance,

RW
 

A four cylinder inline engine has primary unbalance forces and secondary unbalance forces.

Primary unbalance:

The crankshaft is configured (typically) such that two pistons are traveling up and two are traveling down. Since the pistons reverse directions at the same time these forces tend to cancel each other. In addition the counter weights are used on the crankshaft to further manage the forces. To balance an engine after rebuilding the counter weights can be drilled or otherwise modified.

Secondary unbalance:

The pistons accelerate/de-accelerate at different rates about TDC than about BDC. Since the acceleration rates are different, the resulting force is different, resulting in an unbalance. These unbalance forces are much less than primary forces and many engines do not use secondary balancers. Drilling (or adding weight) to the counter weights for primary balancing has no effect on the secondary balance.

Timing of the secondary balancer:

With the #1 piston at TDC the timing mark on the crankshaft drive gear is aligned with the timing mark on the driven gear of the balancer. The gear back lash is set by sliding the balancer assy or shimming depending upon the installation. Yes, the balance weights themselves are timed however since they were not disassembled they should be okay as is.
 
Hello Ryker , I hope you have not finished rebuilding your ENGINE yet , it is not a MOTOR . Engine is combustion fired , Motor is Electric . Ford service manual shows how to time the balancer , but more IMPORTANTLY did you MAGNAFLUX the crank , rods , head , block ? All are noted for cracks . Did you replace the rods bolts ? as they are noted for breaking if you did not check these items you can expect it will last much more than 200 hours before it comes apart again . Yes EVERYTHING should be balanced Crank , Rods , Pistons , Flywheel . Do it right the first it is cheaper than the second rebuild because next time it may break a crank or rod and the block . Thanks Tony
 
(quoted from post at 08:10:29 09/11/14)...it is not a MOTOR . Engine is combustion fired , Motor is Electric .

Then how do you explain a boat MOTOR???

No offense intended, just thought I would note that it an interchangeable term, ICE vs. electric.
 
A friend of mine used to say the same thing about engines and motors. If uyou talked about riding a motor cycle he would ask how long the extension cord was. He said it should be called an engine cycle.
 
In the automotive mechanics trade they have, for a long time now, used the word engine to mean the internal combustion engine that powers the vehicle and the word motor for the electrical motors in the vehicle such as the starter motor, windshield wiper motor and power window motors, etc. So most people who work on vehicles use these meaning and a lot of them think that these are the dictionary definitions of the words, but they aren't.

Dictionary definitions:

==========================

engine [en-juh n]

noun
1. a machine for converting thermal energy into mechanical energy or power to produce force and motion.
2. a railroad locomotive.
3. a fire engine.
4. any mechanical contrivance.
5. a machine or instrument used in warfare, as a battering ram, catapult, or piece of artillery.
6. Obsolete. an instrument of torture, especially the rack.
==========================

motor [moh-ter]

noun
1. a comparatively small and powerful engine, especially an internal-combustion engine in an automobile, motorboat, or the like.
2. any self-powered vehicle.
3. a person or thing that imparts motion, especially a contrivance, as a steam engine, that receives and modifies energy from some natural source in order to utilize it in driving machinery.
4. Also called electric motor. Electricity. a machine that converts electrical energy into mechanical energy, as an induction motor.
5. motors, stocks or bonds in automobile companies.
==========================

As you can see, both words have multiple meanings. Note that definition number 4 for engine says "any mechanical contrivance", and definition number 1 for motor starts out with "a comparatively small and powerful engine". So by these definitions, all motors are engines, but not all engines are motors.
 

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