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HD 21 Crawler

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Jim Weaver

07-23-2000 16:44:11




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I have an old HD 21 with a cable blade, it has always run great. Yesterday I was working her and all of a sudden I was leaking oil, within 15 to 20 minutes all the oil was in the bottom of the engine campartment. I looked all over around the pan, and I can not find where it could be leaking from. I thought at first maybe a pan gasket, but the bolts are tight, maybe some sort of front gasket, but it doesn't look like the oil is coming from there. Any ideas or suggestion would be greatly appreciated.

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bill

07-26-2000 07:57:03




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 Re: HD 21 Crawler in reply to Jim Weaver, 07-23-2000 16:44:11  
On many of those crawlers, you could pump your oil out pretty fast where the injector pump is driven of of the front housing. I doubt it is that.

What I would to isolate the leak to open and obvious sources.

Remove the blade Take the belly pan off Give engine and underneath a super good bath, Clean out the TC compartment, AC TC were notoious for leaking. Use DF or mineral spirits to clean. Then drain. Top off oil for engine and trany, park the the Machine and lock all brakes and put the tc and all gear shift selector levers in neutral and with someone on the tractor to make sure it does not take off run up to operating temp and see where the leak is. It the leak does not appear. Then test drive the unit to determine if it is the TC.

With it all clean the location of the leak will be very obvious. It could be an injector line or leaking coupling, leaking fuel line etc. As you notice the weeps and seeps tighten and elminate or lessen. All the old tractors leak, but leaks are one of my pet peaves. Unless you have the superduty oil filter, the standard oil filter housing is attached to the right side of the engine right above and to the left of the injector pump area. If you have the super duty filter by luberfiner, than one of the lines may be breached. Typically the line followed the frame back along side the fuel lines.

Other places to look, intercooler for the torque converter. I have had tractors leak on the back side and with a Dozer the oil gets sucked in and on an AC PAN that will run right down the back side of the pan and be all over the place. On a loader the oil tends to get blown out the front and you find it pretty fast.


Good luck

Thanks wk [email protected]

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John C-IL

07-23-2000 19:14:55




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 Re: HD 21 Crawler in reply to Jim Weaver, 07-23-2000 16:44:11  
Take a look at any of the external oil lines and oil filter housings etc. I had a D-17 that one of the oil lines was cancered by battery acid. John



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