SEARCH Power-Trac PT-1845 Articulated Tractor

Home ➝ Power-Trac PT-1845 ➝ Maintenance

PT-1845 Scheduled Maintenance

PT-1845 Filter Part Numbers

Hydraulic Filter

  • Gresen K-23018
  • NAPA 1759
  • Case D80538

Engine Oil Filter

  • Deutz 0117 4416
  • NAPA 1342

Engine Fuel Filter

  • Deutz 0117 4696
  • NAPA 3358
  • NAPA 3195

Engine Air Filter

  • Deutz 0438 4102

Deutz filters should be available from any Deutz dealer - Stauffer Diesel for one - the others should be available at NAPA and tractor dealers locally.

Every Eight Hours

After the First Fifty Hours

Every Fifty Hours

Every Two Hundred Fifty Hours

Every Five Hundred Hours or Every Year

Every One Thousand Hours

Every Three Thousand Hours

A few scanned pages from the Deutz engine Workshop Manual:

A few scanned pages from the PT-1845 Owners Manual

API Engine Oil Service Categories

On greasing

From a Lubrication article on greasing technique

A predominant failure mode for a greased bearing is over greasing. The analogous failure mode for oil would be in over filling the equipment well above the "fill line." In the case of over filling a bearing with oil, the rolling elements churn through the oil and generate a significant amount of heat. It's the same for over greasing. The rolling elements churning through the grease generate a great deal of heat that in turn causes an excessive amount of oil to come out of the grease. The process feeds upon itself and the situation only gets worse with more and more oil coming out of suspension.

If the cavity that surrounds the bearing is large enough in size the excess oil from the grease should splash outwards away from the bearing and leave only enough oil to create an adequate film barrier. That assumption is totally correct if and only if there is sufficient cavity space, and, that space isn't plum full of grease. Why would the cavity be completely full of grease? The cavity could be completely full of grease if 1) the application information for quantity and frequency is excessive, 2) instructions are given to fill the bearing full of grease until it is expelled from the drain plug, 3) the cavity size is too small in the first place, 4) the cavity space is full of thickener and not grease, and most important 5) an untrained person on an off-shift finds that the bearing is running hotter than normal and pumps the housing full of grease (happens more times than I care to think about). In all of these cases the outcome is severe. The bearing overheats and the unit is taken off-line for inspection and/or repair.

Charlie's take on the above article:

John:

Once I got to the office, with a bit more bandwidth, I read through the greasing article you cited. I am not convinced it's applicable to us in any event, and I think he may be wrong in at least one of his conclusions, or over-simplifying it.He is talking about industrial bearings with cavities around them to catch the excess grease. The problem arises, apparently, when those cavities are filled. He says that the mechanics are greasing until they feel resistance. I think in normal service that's when you've filled the empty spaces in the bearing, and it takes a bit more oomph to squeeze it out past the races. If the resistance felt is because the cavity is filled, then the effect is that new grease isn't going into the bearing at all, and the grease ultimately breaks down over time.In our spindles, although we can't see it, I suspect that we are squeezing grease out the bottom of the bearing, and the top of our stump jumpers is a mess, which gradually is slung out onto newly cut grass. If so, we're squeezing new grease though the bearings, and the lubricating stuff is always new.I also think he's talking about a couple of years of continuous stuff before a problem. Good current high speed greases don't offgas the oil very fast, and our use certainly isn't continuous. And if the new stuff we're putting in forces some old out, we're doing good things.His statement that overfilling grease is the same as overfilling oil is simply dead wrong, and anyone claiming to write on engineering shouldn't make the mistake. When oil is overfilled, moving parts designed to be operating in air may now be splashing in the oil. That aerates the oil, heats the oil, and absorbs power. It can lead to failure. Grease is not used as far as I know in any assembly where part runs in the grease and part in air. It can't work because the grease doesn't drain down the way oil does. So greased assemblies are always running in grease, and you can't cause assemblies not otherwise exposed to it to be slapping the grease unless you pump it through the greased assembly and into a moving assembly that it isn't even supposed to get to. The design should prevent this.If the guy is right that filling a bearing full with grease is bad, then the oil bath lubricating replacements which fill the whole bearing with oil would boil off all the oil and burn up. More lubricant does not increase operating temperature unless it blocks off a cooling passage or otherwise gets where it shouldn't be. He's misinterpreting his results, and then misstating the cause & effect.[Sure is fun for a lawyer to criticise an engineer -- sort of like a man-bites-dog story.]So, I don't think I'll change my greasing habits. Dave Spaay, my Amsoil rep, says only to be careful not to damage the seals on sealed bearings. The Acrease book says the same. Don't grease for 50 hours. The Exmark spindles don't have zerks. The Power Trac doesn't have a book, so I grease it every time I go out.So There!


Search Copyright © John H Coxon About