Farm Equipment - wd45 starter

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wd45 starter

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Category: Allis Chalmers
Forum Name: Farm Equipment
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URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=29740
Printed Date: 04 Mar 2025 at 2:35pm
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Topic: wd45 starter

Posted By: tnb
Subject: wd45 starter
Date Posted: 25 Apr 2011 at 3:29pm

This winter we completely restored our wd45 complete overhaul paint trany whole nine yards. We wanted it to be original so switched it back to 6 volt system with generator. Now the problem starter barely turns engine over, put new brushes in starter didnt help much. Have a brand new 6 volt battery all new cables, I know the new overhaul will be tight but this will never turn over fast enough to tell what other problems we may have to tweek after haveing completely tore down. We do have spark at the plugs but seems a little week, after working all winter am anxiuos to here her run again but seem to be stuck here. Was told not to pull to start a new ovehaul seems like good advice as timeing may need to be adjusted ect. any ideas?

Replies:

Posted By: Orange Blood
Date Posted: 25 Apr 2011 at 3:43pm

Well, the first question is, how tight do you think the engine is? Did you plastiguage the lower end bearings, and shimmed them properly?

If you are sure of the engine, you may have a bad field in the starter, or a very dirty conductive amrature. If the brushes aren't completely insulated like they should be, you will loose voltage in a mild short that will kill a starter speed dead in it's tracks.

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Still in use:
HD7 WC C CA WD 2-WD45 WD45LP WD45D D14 3-D17 D17LP 2-D19D D19LP 190XTD 190XTLP 720 D21 220 7020 7030 7040 7045 3-7060
Projects: 3-U UC 2-G 2-B 2-C CA 7-WC RC WDLP WF D14 D21 210 7045 N7

Posted By: Robert Mull Georgia
Date Posted: 25 Apr 2011 at 3:47pm

You have to have larger wire size cables with 6 volts that 12 volts. It takes twice the amps when you cut the voltage in half.

Posted By: Don(MO)
Date Posted: 25 Apr 2011 at 6:26pm

You need 1-0 battery cables to start it on 6 volts like Robert said and clean the cable connections good. pull the plugs out and roll the engine over to get oil pressure, one more place to look is at the starter pull it out and clean the head where it fits in the houshing. Don

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3 WD45's with power steering,G,D15 fork lift,D19, W-Speed Patrol, "A" Gleaner with a 330 corn head,"66" combine,roto-baler, and lots of Snap Coupler implements to make them work for their keep.

Posted By: Fields
Date Posted: 25 Apr 2011 at 7:58pm

Just a thaught. The last two wd starters I had rebuilt got a 12 volt field coil put into them.

Posted By: bluebanshee
Date Posted: 25 Apr 2011 at 8:14pm

If it hasn't been tried, couldn't the coil wire be taken off to rule out advanced/timing issues?

Had a starter rebuilt and after a few minutes of cranking the drive wouldn't come out like it should. Had to take it back again. I think he said the armature or something moved out of place.

Posted By: DrAllis
Date Posted: 25 Apr 2011 at 8:26pm

A really good WD-45 gas starter has a center armature bearing......most reman starters do not and it makes a big difference on 6 volts.

Posted By: tnb
Date Posted: 26 Apr 2011 at 8:29am

Thanks for the input I think I will try the larger cable first and take plugs out to roll over faster, Then will try the really good starter with center bearing any idea where to find one or tell wich one to get. I dont think we have a timeing issue yet as it hasnt turned fast enough to get gas or even fire . that may be an issue later starter first. Since the same starter was used as a 12 volt system maybe it has the wrong fields, Weve had tractor forever and dont remember doing anyrthing to starter when we went to 12 volt.

Posted By: Steve M C/IL
Date Posted: 26 Apr 2011 at 8:43am

Worn bushings can make a HUGE difference because it don't take much to let the armature drag the fields.The center bushing is probably the most important one.12V can make a crappy 6V starter seem pretty good.