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HD-21 Converter
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Ray R View Drop Down
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Joined: 10 Jun 2013
Location: 89835
Points: 3 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Ray R Quote  Post ReplyReply Direct Link To This Post Topic: HD-21 Converter
    Posted: 10 Jun 2013 at 6:49pm

Hi, I need some advise. Own a mid 60's HD-21 with a clutch or torque converter problem. Any mechanics out there familiar with these machines?

The old girl has a wet clutch, torque converter, and power shift trans. Power is slow and weak making it through to the drive shaft. After first starting the engine the crawler will not move (after shifting) but as it warms up will begin to respond but even then does not seem to push like it should.

I have changed to atf and filter, cleaned the screen at the bottom of the torque converter and cussed the hell out of it....no luck. Any ideas?

And Thanks!!
Ray
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James Coons View Drop Down
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Joined: 18 Jan 2012
Location: Arizona
Points: 473 		Post Options Post Options   Thanks (0) Thanks(0)   Quote James Coons Quote  Post ReplyReply Direct Link To This Post Posted: 10 Jun 2013 at 9:44pm
Hi, welcome to the forum! I'm not familiar with 21 but I'm sure someone will chime in that has a better idea. Happen to have any pictures?
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Ray R View Drop Down
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Joined: 10 Jun 2013
Location: 89835
Points: 3 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Ray R Quote  Post ReplyReply Direct Link To This Post Posted: 10 Jun 2013 at 9:51pm
Posting still pictures is sorta the issue, would much rather post a video of the old thing pushing a pile of dirt.....
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steve(ill) View Drop Down
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Joined: 11 Sep 2009
Location: illinois
Points: 86738 		Post Options Post Options   Thanks (0) Thanks(0)   Quote steve(ill) Quote  Post ReplyReply Direct Link To This Post Posted: 10 Jun 2013 at 10:19pm
THe motor doesnt drag down when you put it in gear ? Depending on the age, these had brakes that apply in neutral. Need hydraulic pressure to release. (steering system oil). Use to get brake band wear and material would plug the filter and cut down oil flow to release brakes or steer unit.  AFT may be o.k., but we always used 10 wt motor oil in trans / converter.
Like them all, but love the "B"s.
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steve(ill) View Drop Down
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Joined: 11 Sep 2009
Location: illinois
Points: 86738 		Post Options Post Options   Thanks (0) Thanks(0)   Quote steve(ill) Quote  Post ReplyReply Direct Link To This Post Posted: 10 Jun 2013 at 10:21pm

First thing we always did when we had problems was to get the transmission oil pressure and steering oil pressure at the filters to make sure everything was O.K.
Like them all, but love the "B"s.
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