Thread: Hourmeter

It seems that servicing is generally dependent on km's traveled and is set by manufacturers. The magical or ideal servicing of a diesel seems to be change of oil filter & oil every 5000km's.

So, If you traveled at an average speed of 66.6km/h, your 75hrs would be spot on.

Speed (av) = Distance / Time,
so Time = Distance/speed (av)

So for service periods of 5000kms @ certain ave speeds (these are just figures for the sake of the topic)
40km/h = Service per 125hr
50km/h = Service per 100hr
60km/h = Service per 84hr
70km/h = Service per 71hr

Service per 10000km @ certain average speeds
40km/h = Service per 250hr
50km/h = Service per 200hr
60km/h = Service per 167hr
70km/h = Service per 142hr

and so on...

Cheers,
Dave.

All my diesel powered machines we run at the GC are on 100hr service schedual.

The small petrol engines (Vanguard V twins, Kohler V twins and Honda and Kawasaki singles) get oil changes at 50 hrs and filters every 100hrs.

Ive got 10790 hrs out of one of the Kubota diesel powered machines (Cushman Truckster) so far, the body and chassis is giving up before the engine.

LR diesels are probably a bit more touchy obout servicing than comertial stuff so 75hrs would be reasonable id think.

I have often thought of fitting one but never got around to it.

Originally Posted by DaveS3

It seems that servicing is generally dependent on km's traveled and is set by manufacturers. The magical or ideal servicing of a diesel seems to be change of oil filter & oil every 5000km's.

So, If you traveled at an average speed of 66.6km/h, your 75hrs would be spot on.

Speed (av) = Distance / Time,
so Time = Distance/speed (av)

So for service periods of 5000kms @ certain ave speeds (these are just figures for the sake of the topic)
40km/h = Service per 125hr
50km/h = Service per 100hr
60km/h = Service per 84hr
70km/h = Service per 71hr

Service per 10000km @ certain average speeds
40km/h = Service per 250hr
50km/h = Service per 200hr
60km/h = Service per 167hr
70km/h = Service per 142hr

and so on...

Cheers,
Dave.

Thanks Dave,

I guess the best thing to do would be to fit the hourmeter and see how many hours are clocked up in 5000 kms and use that as a baseline. The average speed given by my GPS is frequently around 40. When four wheel driving for long periods, heavy Melbourne traffic, stop/start low range farm work with the engine running etc I reckon that hours would provide a more accurate service interval.

On a 10,000 km schedule with a vehicle that is used predominantly off road or on a farm, with an average speed of 20kmh down to as low as 10kmh, that oil could have potentially been in the engine for 500-1000 hours...

When I get around to fitting the gauge I'll see how many hours it takes to do 10,000kms (probably 1000 then extrapolate).

75 hours sounds about right to me

Isn't this the very reason it used to be 10k or six months what ever came first?

Originally Posted by Wortho

Isn't this the very reason it used to be 10k or six months what ever came first?

The last 2 oil changes on my RRC were done at 5,000k intervals but 4 years between changes!

I service the Isuzu at 100 hours which includes g/box and trans as well. Saying that our Rangie spends a lot of time off road in low range under 20kph. So 100hr intervals works for us. Diffs get done every 200 hours.

Depends on the speed/hour ratio.

Justin

Originally Posted by Graeme

The last 2 oil changes on my RRC were done at 5,000k intervals but 4 years between changes!

wouldn't the protective/lubricative qualities have broken down by then?
I've often wondered because my rr doesn't do many k's and i do oil changes every year.

Interesting variant on all this :-

From the owner's handbook Series 2a.

"Maintenance attention which can be based on miles or kilometres or fuel consumption or running time"

Basic service interval is given as 5000km, 630litres petrol, 450litres diesel or 120hours, petrol or diesel.

John