hi guys, i bought a used 763 that had factory heat but would keep blowing the fuse when fan was turned on. i had the bobcat dealer install new fan(s) and now they will turn on but the problem is IMO not very much air blowing out the vents. i called a couple buddies who run some T250's and they say thiers blows so hard they will need to turn down the fan and reduce the heat. my filters are clean..it' was my understanding that there are 2 fans that run the heat (and air) i would expect these fans to blow heat like a car does especially being that there are 2...are they plug and play or do they get re-wired, could the mechnic have one going backwards or maybe one isn't even running? the fans sound like they are howling pretty good so i can't imagine they don't blow harder....i have never had heat in a skid steer but hope it works better than this....any thoughts?
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There is a 1 motor that runs 2 fans. One or both of the fan cages could be on backwards. If you remove the inner filter and look down inside the box you can see the motor. The fans are covered but you should be able to see enough to see if one is on backwards. If you run the fan with the inner filter out of it air should blow out of it. Hope it helps.
skidsteer.ca
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Is it a lack of heat in the air or more of a lack of air flow. Could be that the ducts are leaking? Or a poor ground or low valtage on the power wire.
My 93 had only the low speed + wire conected on the fan, I put in a switch that powered the hi speed wire but still found a second aftermarket fan helped alot to clear the fogging.
If you loader is the newer G series with the dual squirrel cage fan these usually have plenty of air flow.
Ken
My 93 had only the low speed + wire conected on the fan, I put in a switch that powered the hi speed wire but still found a second aftermarket fan helped alot to clear the fogging.
If you loader is the newer G series with the dual squirrel cage fan these usually have plenty of air flow.
Ken
it is not a lack of heat, the "thermostat" seems to work fine, just not good airflow. when i say not good airflow i'm expecting it to blow similar to a car blower, ie: pretty strong. it is a 763 G series machine. the ducts are plastic and don't have any obvious cracks but i'll look again.
skidsteer.ca
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Just unbolt the ducts from the cab, check the foam seal where they fasten, good time to clean the crud out of them. Them check your voltage at the fan motor, check it at different speed setting on the switch, any poor conections either ground or power will cause a low voltage reading and reducted fan power.
I'm not overly impressed with the duct placement on the g series (though its the best to date) as far as clearing the frosty windows off, but the fan does have pretty good flow.
Ken
thanks for the reply..have another question don't know if this is coincidence or from work on heater but now my machine overheats in 15 minutes at about half throttle. today was the first day i worked it after getting it back. it would have gone into the yellow if i hadn't been paying attention, ran in the low green area before it was worked on
sterlclan
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check the belts? sometimes reversing the heater hoses will clear blockage in the heater core Got antifreeze? if you mix the wrong kinds of antifreeze you get jello or a a snow globe. no blockage in the rad or oil cooler?.......Jeff
don't know if anyone cares but wanted to update my heater and overheat problems . i try to read all the repair and problem threads just to learn, and thought maybe some of you do too. especially on the hard to fix (quirky) ones which i guess maybe this was.. the problem w/ the lack of airflow out the heater vents was due to the mechanic installing the motor spinning in the wrong direction..fairly simple, the overheating problem was a little tricky because it only happened to me once and the dealer could not duplicate it. i had asked that they keep the machine another day and run it because i know it had gotten hot, not just a faulty sending unit or guage. 2nd day couldn't find anything and asked me to come pick it up. i asked them if they would run the machine one more day in between jobs just to be sure....purely by accident the mechanic walked by the machine and realized the fan was spinning....what was happening was that the tensioner on the fan belt was intermittently sticking causing the belt to go slack and engine get hot it also made it hard to detect! steve Ground Effects
Glad it got all worked out. You are lucky they found the over heating problem, that could have caused a lot of grief if it wasn't traced and from the sounds of it it almost didn't....
