ancient riflesmith
New Member
Hello, Komatsu owners.
I just now registered on this site. I long have been lurking and enjoying the great advise given here.
I've owned a little D20A-6 for around 20 years and have worked the dickens out of it on our ranch for maintaining drive, shooting ranges and other grading, clearing and road building. Dozer had 1600 hours when bought and now has 3360. I replaced most of the undercarriage at around 2800 hr. Replaced steering clutches at 3000?. Have a question for some of you experts.
This evening while burning some huge brush piles I had one stump that I haven't been able to dig out. When I tried to push it again, the main hydraulics shut down. Blade no move, Trans, gears reversed, 1st forward was backing me up, 1st rev. was moving forward. The middle warning light on dash illuminated. I shut off engine and inspected all the fluids, all normal. After about 10-15 minutes I restarted engine and hydraulics worked normally. Being and old mechanics with lots of hyd. experience I would say the pressure relief valve on main hyd was open. I don't think there is a high temp shut off for the system. Please any ideas out there. Also my eyes are too old to see the icon on the three warning lights on the left side panel. Can someone tell me what the middle one is for. I'm an old guy but still maintain our ranch, mostly alone. I have put 6 days riding this dozer from 6-9 hour a day. Also rode farm tractor a few hours in between dozer sessions. I see a 50 year old on here complaining about how he hurt after a few hours on a D20. I say, son you need to toughen up a bit. just kidding.
thanks for any help with the hyd question.
ancient riflesmith
I just now registered on this site. I long have been lurking and enjoying the great advise given here.
I've owned a little D20A-6 for around 20 years and have worked the dickens out of it on our ranch for maintaining drive, shooting ranges and other grading, clearing and road building. Dozer had 1600 hours when bought and now has 3360. I replaced most of the undercarriage at around 2800 hr. Replaced steering clutches at 3000?. Have a question for some of you experts.
This evening while burning some huge brush piles I had one stump that I haven't been able to dig out. When I tried to push it again, the main hydraulics shut down. Blade no move, Trans, gears reversed, 1st forward was backing me up, 1st rev. was moving forward. The middle warning light on dash illuminated. I shut off engine and inspected all the fluids, all normal. After about 10-15 minutes I restarted engine and hydraulics worked normally. Being and old mechanics with lots of hyd. experience I would say the pressure relief valve on main hyd was open. I don't think there is a high temp shut off for the system. Please any ideas out there. Also my eyes are too old to see the icon on the three warning lights on the left side panel. Can someone tell me what the middle one is for. I'm an old guy but still maintain our ranch, mostly alone. I have put 6 days riding this dozer from 6-9 hour a day. Also rode farm tractor a few hours in between dozer sessions. I see a 50 year old on here complaining about how he hurt after a few hours on a D20. I say, son you need to toughen up a bit. just kidding.
thanks for any help with the hyd question.
ancient riflesmith
