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eplurubus
Joined: 16 Nov 2004
Posts: 56
Location: colorado
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| Posted: Sat Dec 08, 2007 2:02 pm Post subject: pm's - engine hours versus miles? |
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Does anyone schedule their engine maintenance based upon hours instead of miles? I'm thinking about doing this. I have a Mack, and the operator's manual gives me the option of changing the oil every seven-hundred hours of use instead of going by miles driven. I'd still grease the truck using miles, though, since technically I could put hundreds of hours on the engine and not move the truck an inch.
When I was working for a farm or ranch, I'd use an hourly maintenance schedule on the farm tractors, but my service intervals weren't even close to seven-hundred hours! I'd grease every fifty hours and change the oil and filter every one hundred-fifty hours, with an air filter if needed, and I'd go few and far between on the fuel filters and hydraulic filters. |
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solo379
Joined: 14 Feb 2004
Posts: 3162
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| Posted: Sat Dec 08, 2007 3:49 pm Post subject: Re: pm's - engine hours versus miles? |
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eplurubus wrote: Does anyone schedule their engine maintenance based upon hours instead of miles?
I always do! I believe it's more appropriate, cause idling puts even more "dirt" in the oil. I also keep track of my miles, but just for informational purpose. |
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COLT
Joined: 03 Jan 2006
Posts: 576
Location: FT ST JOHN
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| Posted: Sat Dec 08, 2007 4:46 pm Post subject: |
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Before reading this board, I thought everybody went by hours....
500 hr's max, the new engines load the oil with soot, maybe less hour's on the new engines ?
I just shut my truck off, after 10 days, mostly idleing @ 1200 rpm, winter front almost closed off, running at 200 deg F ( very cold out ) heater MUST be on recirculate, not fresh, to keep engine temp. up.
When I go to the arctic, I belly tarp, the engine & trans. maybe 50 wt trans oil in the hubs too...
If I owned the truck, I would use synthetic oils, soo expensive for a big company to change over.... $$$$$ |
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Splitshifter
Joined: 19 Jun 2006
Posts: 714
Location: Right here
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| Posted: Sun Dec 09, 2007 8:20 pm Post subject: |
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I always changed oil & filters every 300 engine hours when I had my own dump trucks. (They were also Macks).
Complete grease job every 5 working days.
The company I work for now adheres to a similar schedule.
Oil & grease are cheaper than parts and much easier to install. |
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