HD4 convertor oil

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I've got a 68 HD4 that's acting up. It acts like it's losing pressure to the clutch or torque convertor. Sometimes it snaps right into gear with the shuttle handle, other times it takes 10 seconds or so to engage. Sometimes when you get the thing moving it bogs down and stops when you try to steer with the pedals.  
I'm going to go get a guage and check the valve pressure tomorrow. 

What kind of covertor oil should I use? My book says "type A". What does that translate into in modern day oil?

Someone suggested that I change the convertor filter. I can't read anything on my filter. Anyone know what filter I need for a 68 HD4?

Any other suggestions or advice is appreciated. 

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Thulsa Members Profile Send Private Message Find Members Posts Add to Buddy List Bronze Level Joined: 08 May 2011 Points: 9	Post Options Post Reply Quote Thulsa Report Post Thanks(0) Quote Reply Topic: HD4 convertor oil Posted: 28 May 2012 at 4:56pm
	I've got a 68 HD4 that's acting up. It acts like it's losing pressure to the clutch or torque convertor. Sometimes it snaps right into gear with the shuttle handle, other times it takes 10 seconds or so to engage. Sometimes when you get the thing moving it bogs down and stops when you try to steer with the pedals. I'm going to go get a guage and check the valve pressure tomorrow. What kind of covertor oil should I use? My book says "type A". What does that translate into in modern day oil? Someone suggested that I change the convertor filter. I can't read anything on my filter. Anyone know what filter I need for a 68 HD4? Any other suggestions or advice is appreciated.

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Coke-in-MN Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 12 Sep 2009 Location: Afton MN Points: 41201	Post Options Post Reply Quote Coke-in-MN Report Post Thanks(0) Quote Reply Posted: 28 May 2012 at 6:50pm
	Type A suffex A GM automatic transmission fluid.
	Faith isn't a jump in the dark. It is a walk in the light. Faith is not guessing; it is knowing something. "Challenges are what make life interesting; overcoming them is what makes life meaningful."

big al Members Profile Send Private Message Find Members Posts Add to Buddy List Silver Level Joined: 15 Apr 2010 Location: indiana Points: 160	Post Options Post Reply Quote big al Report Post Thanks(0) Quote Reply Posted: 28 May 2012 at 7:21pm
	my friend has a hd4 that does the same thing .except after setting for a while it is losing the trans oil. you have to add to it to get it to move.any sugestions?

Thulsa Members Profile Send Private Message Find Members Posts Add to Buddy List Bronze Level Joined: 08 May 2011 Points: 9	Post Options Post Reply Quote Thulsa Report Post Thanks(0) Quote Reply Posted: 28 May 2012 at 7:27pm
	Is that the same as modern Dexron III atf fluid?

Coke-in-MN Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 12 Sep 2009 Location: Afton MN Points: 41201	Post Options Post Reply Quote Coke-in-MN Report Post Thanks(0) Quote Reply Posted: 28 May 2012 at 10:21pm
	Hope your pulling the clutch and not trying to just use brake to steer as it will bog with brake applied. Your clutch pack or the converter could be the problem. As far as leaking torque converter seal sounds like it might be bad . Throttle down when shifting fwd/ rev to stop damage to the finals as they are single reduction straight gears and the small gear teeth on the clutch shaft can be chipped or broken easily.
	Faith isn't a jump in the dark. It is a walk in the light. Faith is not guessing; it is knowing something. "Challenges are what make life interesting; overcoming them is what makes life meaningful."

Thulsa Members Profile Send Private Message Find Members Posts Add to Buddy List Bronze Level Joined: 08 May 2011 Points: 9	Post Options Post Reply Quote Thulsa Report Post Thanks(0) Quote Reply Posted: 29 May 2012 at 6:58am
	Coke, the only way I know of to steer this machine is to push on either the left or right steering pedals, which are steering brakes. One pedal brakes one or the other. If you brake one side, the other side keeps moving and the machine steers one way or the other. Is this not correct? How do I pull the clutch to steer the machine? Did I mis-understand your post?

Coke-in-MN Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 12 Sep 2009 Location: Afton MN Points: 41201	Post Options Post Reply Quote Coke-in-MN Report Post Thanks(0) Quote Reply Posted: 29 May 2012 at 10:27am
	You should have 2 levers for the steering clutches , you pull that clutch on side you want to turn to and apply that brake on that side. Just pulling the clutch will give the non-drive side power to move machine in turn or correction. Just applying the brake does nothing as the machine is still driving on both tracks. Later machines 653 / 655 used pedal steer where the first pressure on brake pedal releases steering clutch and more pressure applies the brake band. A needed item on the HD4 is a decillerator . a 3rd pedal to reduce engine power for inching machine, slowing down, or shifting . Unlike some other makes of machines there is no differential in the drive system , its direct drive from ring and pinion to the finals of each track but has the clutch pack to act as a means to disconnect power from one track to allow turning. Edited by Coke-in-MN - 29 May 2012 at 10:29am
	Faith isn't a jump in the dark. It is a walk in the light. Faith is not guessing; it is knowing something. "Challenges are what make life interesting; overcoming them is what makes life meaningful."

Randaleky Members Profile Send Private Message Find Members Posts Add to Buddy List Silver Level Joined: 17 Aug 2011 Location: belfry, ky. Points: 423	Post Options Post Reply Quote Randaleky Report Post Thanks(0) Quote Reply Posted: 29 May 2012 at 11:29am
	good post coke. the only time you really don't need the brake is if going up an incline after you pull the steering lever.

Thulsa Members Profile Send Private Message Find Members Posts Add to Buddy List Bronze Level Joined: 08 May 2011 Points: 9	Post Options Post Reply Quote Thulsa Report Post Thanks(0) Quote Reply Posted: 29 May 2012 at 2:31pm
	Well, there aren't any steering levers on this machine. I know what every lever on this thing does. The guy I bought it from told me to steer with the pedals, so I'm assuming it's a later machine with the pedal steer, as coke mentioned. Funny that you mention a decellerator pedal. There is a third pedal on my machine that I've never been able to figure out what it's function is supposed to be. It seems to drag the engine rpm down a little but that's about it. Today I did what the book calls a "hot check" of the torque convertor oil. It looks like it may have been low. I always checked it cold before and it seemed alright. I'm going to add some fluid later and see if it makes any difference. Easy stuff first.

Coke-in-MN Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 12 Sep 2009 Location: Afton MN Points: 41201	Post Options Post Reply Quote Coke-in-MN Report Post Thanks(0) Quote Reply Posted: 29 May 2012 at 3:26pm
	then you don't have a HD4 but a 655 , yes check hot and I believe with engine running also ??? Need to fill torque converter and all passages with oil to get proper level. Light foot pressure should operate clutch pack and hard push set the brake on that side. The decellerator should bring engine to idle , check linkage to be sure it's free and has full movement to over-ride hand lever throttle.
	Faith isn't a jump in the dark. It is a walk in the light. Faith is not guessing; it is knowing something. "Challenges are what make life interesting; overcoming them is what makes life meaningful."

big al Members Profile Send Private Message Find Members Posts Add to Buddy List Silver Level Joined: 15 Apr 2010 Location: indiana Points: 160	Post Options Post Reply Quote big al Report Post Thanks(0) Quote Reply Posted: 29 May 2012 at 9:38pm
	hey coke,my friends hd4 has a decelorator,maybe it is a late model?

Coke-in-MN Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 12 Sep 2009 Location: Afton MN Points: 41201	Post Options Post Reply Quote Coke-in-MN Report Post Thanks(0) Quote Reply Posted: 29 May 2012 at 11:30pm
	declaratory was a option on the machines , early and late . As no clutch but a torque converter was only way to stall or stop machine was to reduce engine rpm to stall converter. The HD4 lever steer was a pain to run as you used the right foot to decelerate and left to brake to steer, so right foot ended up on right brake sometimes and other left foot was on right brake if you had to throttle down. Then sometimes you needed to move attachment or change direction but hands were on clutches, throttle and fwd/rev on left side and hyd on right side .. you end up with hands and feet crossed and none left to do what you intended to do . Least with the HD5 you can pull the master clutch and regroup. On my FD5 it has 2 brakes + 2 decelerator on each side and a center pedal you can push and it applies both steering clutches and brakes . You stop moving .
	Faith isn't a jump in the dark. It is a walk in the light. Faith is not guessing; it is knowing something. "Challenges are what make life interesting; overcoming them is what makes life meaningful."

HD6 Merv Members Profile Send Private Message Find Members Posts Add to Buddy List Silver Level Access Joined: 03 Aug 2010 Location: New Zealand Points: 476	Post Options Post Reply Quote HD6 Merv Report Post Thanks(0) Quote Reply Posted: 30 May 2012 at 12:14am
	Coke; i learned to drive on a cat 933G traxcavator. It had 9 levers sprouting out of the floor, and i needed everyone of them to drive it ! plus a pedal for each foot. Made me appreciate the 941 when i got it ! powershift and pedal steer certainly made it alot easier on a man when doing excavation work. Cheers Merv
	tits tyres and tracks they all cost you money

michale34 Members Profile Send Private Message Find Members Posts Add to Buddy List Silver Level Joined: 15 Mar 2011 Location: arkansas Points: 472	Post Options Post Reply Quote michale34 Report Post Thanks(0) Quote Reply Posted: 30 May 2012 at 9:07am
	I started out on a hd6g lowlift that you just opened the throttle wide opened and used 2 foot controle brakes and haf dozen leavers and then i ran a hd6g hilift that had a decellator that was never used . THEN i got on a 7gb that had 2 levers and three floor pedals I hit the side of the truck a dozen times I was reaching for leavers that wasent there. thats why I liked the hd7g it had the leavers but was easy to run .I knew a guy with one arm that bought a hd7g brand new and thats all he ever wanted.