When did they Start making the bcis machines? What does BICS stand for?
5000 hrs is quite a few. Bigger diesels generally have a 10000 hr life sometimes more. Unsure about the little Kubota, they may run this long as well. I think the biggest thing limiting life span in a skid steer is that these types of machines tend to get run just a few minutes to hours at a time. Where a lot of other diesels put in a "day long" shift.
If its in good shape, they will start down to 0 degrees F with just the glow plugs (10/30 motor oil)
My 553 is beginning to need injectors, and if you set the idle low on a cold start you can hear the 3rd cylinder start firing after a few seconds. When cold it fires and fires a few times before it starts. Not just hit the key and its running, ( how it should be)
Even so the "cold start" smoke is gone in 20 to 30 seconds. Which is how a 753 should be too. I had a 93 753 from 2100 to 3300 hrs. I sold it because t was too small for my needs. Not because it was a bad machine. I had no major problems with it 93 Was about the last year you could get a machine without the BICS (bobcat interlock control system) Its not really a computer. Just a safety system.
It has a seat bar sensor, a seat load sensor. when both of these sensors sense the operator sitting in the seat, and the seat bar down. A power feed is sent to unlock the park solenoid, and another power is sent to a valve to unlock the boom lift and bucket tilt functions. If it fails it can be easily bypassed. But remember it is a safety feature.
My 93 had a park brake (not a park pin) It could be force to move by a careless operator with the park break on. A bics park brake will not move (stalls engine first) unless you smash it up. You can remove 2 bolts to defeat it if necessary.
The computer part comes in with the BOSS system which my 93 had. It monitors water temp, engine oil press, hydro charge pump press, hydro temp, fuel level, air filter, coolant level, volts, and I probably forgetting some. Its is great in theory. If any system gets out of range it will beep at the operator to wake him up, and then shut down the engine if its anything other than fuel level or air filter. But this system require several new sensors in the hour I used my machine at $35 to $50 a pop to keep it working. Around 3000 hours the display began throwing out unusual gibberish codes and shutting off the engine. We checked the ground wires to no avail. The local Bobcat dealer lent me a used computer for try, and that solved the problem. 100 hrs no trouble. But $800 used and new was 1500??
So I drilled the rivets out of the old computers tin case and took the printed circuit board to a local electronics guy. He test what he could on it and tighten a few ground screws that were neither loose or tight. But that did the trick, and it work properly until I sold it, and I just spoke with the buyer the other day, 18 mo later, and he says he has had no problems. But does not use it a lot. I'm unsure of the present hours.
Imo I could live without the boss, but I think it is standard in the G and newer series. The 753 is a very good all around small to mid sized machine in my experience. As they got newer they upped the hp and hydraulic flow and pressure some. A local tech told me they have much less trouble with the boss on the G series machines. Mine was not even a C series yet. I think the BICS became std equipment with the C.
When I sold it the engine still run its 100 hours between oil changes without adding. I did no hyd work to it other then one blown hose.
The most serious failure was a broken pin from the loader arm to the bottom of the bobtach. And there was a update to make that stronger. Also there was a crack in the loader boom cross member just beside the tilt cylinder on the top side of the boom. Someone had re welded it before I got it, and I had to re weld it once also.
With 5000 hours, I'd want to rent it for 25 hours or so. Keep a very close eye on engine and hydraulic oil consumption. Both should be nothing. Remove the oil fill cap with the engine running and look for piston ring blow by. It should be minimal, and definitely not a puff, puff, puff, which indicates one cylinder that is seriously low on compression.
How much slop do the pins have, especially the tilt cylinder at the bobtach, this one wears the fastest. ---If you lift a bucket full of dirt in the air, none of the loader cylinders should leak down, leave it sit for a few minutes to see.
With those hours, I think the pins have been changed a least once. Also are the pins tight in the frame of the machine. Because there are no bushing in some of those places, and repairs are not as simple as hammering in a new bushing and pin. Consult the parts manual if they are loose, to see if there is a bushing, or if a new pin boss needs welded to the frame. (read not a simple fix) Look for drips underneath. See how it starts when cold, and how soon it stops smoking. A warm engine should have no smoke unless it is really working hard.
Look at the engine coolant, to see if it is contaminated with oily gunk, a sign of a bad head gasket.
After it has been used an hour or so. (good and warm) idle the machine down and see if it will still turn around, left then right (on dry pavement) at low rpm, do both side respond and act the same. will the lift and tilt functions stall the idling engine, or at least make it grunt. A sign of good hyd pressure. Is the lift function strong, trys to lift the back of the machine off the ground..
Has the dealer repaired anything on it , or are they aware of the history. Type of work it did, maintenance records. Mine spent many hours running a hoe, which is pretty easy on the machine. Just sitting there pumping oil. As opposed to something like a jack hammer, pounding on it. Any good dealer should let you try it out, or rent it for a reasonable price. Should have done a flow meter test on the pumps, and maybe compression and injectors tests.
With those hours it got to have some wear, just be sure its not wore out. Sorry for being long winded.