OP
AndrewInOz
New member
- Joined
- Aug 28, 2010
- Messages
- 22
- Tractor
- Same 90
Well nearly 10 years this problem has been dogging me, but finally a result...
Summary:
Kioti DK35 260hours "Making Oil" ie Engine oil level increasing.
Said to be fuel : lift pump and injection pump replaced.
Found to be losing hydraulic oil: hyd pump seals replaced x2 + pump replaced.
Found clutch housing filled with oil near to starter motor level, drained and engine no longer making oil. More work ahead.
Details:
Finally got this tractor back home after many years grappling with this fault by periodic replenishing universal gear oil and draining excess engine oil in the field. Only few hours/yr slashing " brush hog" for this so manageable but PITA.
Now with tractor finally home, today repaired a totally unrelated recent problem : sluggish or impossible starting when hot.... to my amazement the starter pinion dripping with oil and the bell housing full to just below the starter.
Amazing because
- it runs fine, clutch normal. bit gutless at low revs but this is our only dk35, only subjective.
- I had checked the clutch housing drain years ago at the start of this.... dry.
So open the small 8mm bell housing drain again.. nothing. But I now know its full and only upon heavy probing with a sharp screwdriver do I break a v hard crust? clogging the drain. Over 5 liters oil drained. Then worked tractor for over an hour and engine oil level OK, but after drained another liter out of the bell housing.
Unfortunately a split necessary to know more, but at least we know where we're going now. This has been a nightmare.. hope this helps others with this obscure but not uncommon problem.
And , the starter problem was just a jammed brush. The armature/solenoid totally dry , protected by O ring seals beyond the planetary reducer. Filed the brush down so slides in its guide. Dead luck it gave trouble.
Take home messages:
- for whatever reason this Kioti has a sealed bell housing. Even the starter motor had a gasket !!
If yours is too & nearing end of warranty, check there isn't oil in the bell ( clutch ) housing. This is a slow burn silent problem with non trivial consequences.
-the motor will test run with the lift pump bypassed so thats any easy test for the most likely cause for increasing engine oil.
- Injection and lift pump leakage is easily determined by viscosity test eg compare drops speed running down eg mudguard.
- the Cassappa hydraulic pump is well supported. Although the DK35 pump is an oem part,there are HP seals available for this family. Low pressure 'LP' shaft seal is generic. The Korean replacement part isn't so well supported here in .AU
- the Casappa hydraulic pump shaft side is ported to the suction so the hydraulic pump HP seals have to leak heaps , guessing impossible flows , to get the shaft pressure over the allowable 1-3 bar pressure so an unlikely cause for an ok looking pump.
- check the gearbox vent in the candy cane filler cap isn't blocked by eg hornets. Good or bad the gearbox is unfortunately very well sealed too so this tiny vent blockage can easily test your seals.
- TBA: thinking to keep the bell housing drain plug in the toolbox.
Summary:
Kioti DK35 260hours "Making Oil" ie Engine oil level increasing.
Said to be fuel : lift pump and injection pump replaced.
Found to be losing hydraulic oil: hyd pump seals replaced x2 + pump replaced.
Found clutch housing filled with oil near to starter motor level, drained and engine no longer making oil. More work ahead.
Details:
Finally got this tractor back home after many years grappling with this fault by periodic replenishing universal gear oil and draining excess engine oil in the field. Only few hours/yr slashing " brush hog" for this so manageable but PITA.
Now with tractor finally home, today repaired a totally unrelated recent problem : sluggish or impossible starting when hot.... to my amazement the starter pinion dripping with oil and the bell housing full to just below the starter.
Amazing because
- it runs fine, clutch normal. bit gutless at low revs but this is our only dk35, only subjective.
- I had checked the clutch housing drain years ago at the start of this.... dry.
So open the small 8mm bell housing drain again.. nothing. But I now know its full and only upon heavy probing with a sharp screwdriver do I break a v hard crust? clogging the drain. Over 5 liters oil drained. Then worked tractor for over an hour and engine oil level OK, but after drained another liter out of the bell housing.
Unfortunately a split necessary to know more, but at least we know where we're going now. This has been a nightmare.. hope this helps others with this obscure but not uncommon problem.
And , the starter problem was just a jammed brush. The armature/solenoid totally dry , protected by O ring seals beyond the planetary reducer. Filed the brush down so slides in its guide. Dead luck it gave trouble.
Take home messages:
- for whatever reason this Kioti has a sealed bell housing. Even the starter motor had a gasket !!
If yours is too & nearing end of warranty, check there isn't oil in the bell ( clutch ) housing. This is a slow burn silent problem with non trivial consequences.
-the motor will test run with the lift pump bypassed so thats any easy test for the most likely cause for increasing engine oil.
- Injection and lift pump leakage is easily determined by viscosity test eg compare drops speed running down eg mudguard.
- the Cassappa hydraulic pump is well supported. Although the DK35 pump is an oem part,there are HP seals available for this family. Low pressure 'LP' shaft seal is generic. The Korean replacement part isn't so well supported here in .AU
- the Casappa hydraulic pump shaft side is ported to the suction so the hydraulic pump HP seals have to leak heaps , guessing impossible flows , to get the shaft pressure over the allowable 1-3 bar pressure so an unlikely cause for an ok looking pump.
- check the gearbox vent in the candy cane filler cap isn't blocked by eg hornets. Good or bad the gearbox is unfortunately very well sealed too so this tiny vent blockage can easily test your seals.
- TBA: thinking to keep the bell housing drain plug in the toolbox.
