How is 1 hr on the hour meter determined? Maybe 1 hr operation at 2000 RPM?

 

per the owners manual:

Engine hour meter:

 

yea so if you like it sit at idle, it's counting!! I'm at like 505 and i got my in sept. 04

 

I'm curious... what does your mph calculate based on your total miles and engine hours? I turned 1000 hours this week with around 38,000 miles - 38 mph. I thought this was low considering most of the miles are on the highway.

Jim

 

In addition to that definition you gentlemen might also find it useful to know that the official hours to mileage conversion (or vice-versa) is: 1 hour of engine operation is equal to 33miles of driving.


The hour meter does not in any way change the mileage on the odometer, nor does the odometer affect the hour meter. The odometer and the hour meter work completely independently of each other but the hour meter is an important supplement that will indicate an engine that has been idled excessively.

 

Remember idle time counts too

 

Bought mine 3.26.05 it now has 334.2 Hours and 18,216 miles!! 54.506 average miles per engine hour!! The Hour meter has a few quriks. If you have a lot of stops within 1 mile of each other the hour meter starts from the last 6 minute start. So it's not a true hour meter!!

 

Ford Doctor, correct me if I am wrong, but does Ford have an official standpoint on oil change interval for say service related trucks that are required to idle more frequently? (due to PTO usage) Was thinking that maybe owners who choose to Fast idle their trucks, rather than shutting them off would have a way to stay out of the neglect (warranty denial) catagory. Per say changing the oil at 100 hours versus the 5000, or 7500 mile interval. Of course documentation is everything. But was curious to say the least.


Ryan

 

I am not AWARE of any official policy nor have I ever heard the topic discussed professionally concerning warranty. I don't think that it's much of an issue but hey, I am just a technician. We, for the most part go by mileage only. I have read that Ford recommends the use of hour meters for high idle applications like police and Emergency vehicles to more accurately determine their service needs and intervals. Just for the record I care not to back-up or dispute Fords warranty or policies. I'll leave it at that.


From the sound of your post, you have put some thought into this. My advice is for anyone who thinks that this poses an issue to consider their own situation and make a sensible decision.

Here is what I would do

1) Consider that oil change intervals are recommended at:

• 7500 Miles for normal conditions
• 5000 Miles for severe duty applications

2) Figure the hours for each mileage (miles/33=effective hours)

• 7500 Miles = 227 hours
• 5000 Miles = 152 hours

3) Weigh the figures: Since I would change my oil at 5000 miles regardless, but I would also NOT allow my engine hours exceed 227 if I also idled my truck a lot. The bottom line: I would change my oil every 5000 miles OR 227 engine hours, which ever comes first. It's not totally perfect but it does keep you in the ballpark!

This totally my own opinion. If it makes sense to you, use my rule and let me know what you think. We can call it "Ford Doctor's 5000/227 Rule." Good thread by the way - it made me think about this. I now have an answer for that question!

 

Thanks for your unofficail, impartial reply .

This is what I was looking for. The business I'm in oil is either changed by hours, or bad sample, power cylinder/liner failure, or at worst a crankcase full of water. 1100 gallons is a lot of oil to throw away for no reason!! I personally run synthetic, and am thinking the 7500 or 200 hours whichever comes first. During the first 10,000 miles, I am using conventional, and will use the 5000 or 150 hours which ever comes first rule. I have the fast idle pto mod, (thanks to this site) so when I do let her idle, its at 1200 rpm. I am of the opinion, that the more starts on an engine, the more wear is accumilated, and see no sense to shut the truck off for anything less than 30 minutes. Also I never shut down when refueling while pulling my 11,000# Toyhauler.

Ryan

 

(p66)

Extensive idling and/or low-speed driving for long distances as in heavy commercial use such as delivery, taxi, patrol or livery

Every 5,000 miles (8,000 km), 6 months or 200 hours of engine
operation (whichever comes first): Change engine oil and replace
filter

Every 5,000 miles (8,000 km): Check air filter restriction gauge
(replace air filter as required or when air filter restriction gauge
indicates)

Every 5,000 miles (8,000 km): Inspect brake system. Inspect and
lubricate 4x2 ball joints and steering idler arms

30,000 miles (48,000 km) and 90,000 miles (144,000 km):
Lubricate 4x2 wheel bearings. Replace wheel bearing grease seal.

Every 60,000 miles (96,000 km): Change transfer case fluid
Scheduled Maintenance Information

 

Thanks but I don't have a complete answer yet. I'm very well awair or what the owners manual says.

It doesn't say what measurement is used to determine "engine hours". I'm pretty sure that 1 hr on the hr meter is not 1 clock hr. If it is, it is measured differently than another hr meter I've ever used. Usually the hr meter is completely independant of miles traveled. Example: the hr meter may be set to log 1 hr if the motor runs a constant 1500 rpm for 1 hr. If the same motor runs a constant 3000 rpm for 1 hr, then it would log 2 engine hours.

Again does any one know how the hr meter was set at the factory? That is to say, at what constant rpm setting times 1 hr will I get 1 engine hr?

 

The hour meter is set to register 1 hour for every 60 minutes that the engine is running. It does not matter at what RPM the engine is running at.

If it isn't doing that something is wrong with it.

 

My understanding is "it is not an PRM" that sets it...it is run time after starting at any RPM

 

What is considered excessive idleing?