Section for komatsu d20,21 and similar grey market dozers

[Sal.Monella]

Thank you Kent

The fax told me what I needed to know. (that I'm missing a part). I guess I need to buy a parts book sooner than later. I'll get that water pump out to you very shortly. That said, is that little mutant drive shaft rebuildable or does it need to be replaced as a unit.

Once again thanks and I'm sure I'll be buying more parts from you shortly. This is a big change from working on brush trucks.

spot

 

[KTBAUGH]

hello,

you should be able to just get the joints but i can check on it monday.

thanks,

kent baugh
www.ktbaugh.com

 

[Sal.Monella]

Buy the parts book

I got my parts book in and it is a life saver. I've had the owners manual and service manuals for a while and they're weak compared to the parts book.

 

[Ron]

Undercarriage Pricing

I was wondering about the prices I've been given on parts - what do y'all think? It's for a D20P-6:

Chain with pads $1826 (single grouser)
chain w/o pads $1000, pads $22 ea
top rollers $127
bottom rollers $128

I failed to get a price on the sprockets. Shop labor $68 / hr. Are these prices competitive?

 

[oldhousehugger]

Response to pricing ?

I was wondering about the prices I've been given on parts - what do y'all think? It's for a D20P-6:

Chain with pads $1826 (single grouser)
chain w/o pads $1000, pads $22 ea
top rollers $127
bottom rollers $128

I failed to get a price on the sprockets. Shop labor $68 / hr. Are these prices competitive?

Ron
I paid about 80 bucks each for non OEM bottom rollers from Heavyquip in Irving Texas 2 years ago.
John

 

[jwebb]

Another Oil question

HELLO MANIAC,

YOU ARE BETTER OFF RUNNING A 30W OR 15W40 MOTOR OIL IN THE MAIN CLUTCH HOUSING. YOU CAN ALSO RUN MOTOR OIL IN THE TRANS/REAR DIFFERENTIAL. HERE IN TEXAS WE RUN 90W GEAR OIL IN THE TRANS/REAR DIFFERENTIAL. YOU WILL SEE BETTER RESULTS WITH THE HEAVIER OIL IN THE CLUTCH HOUSING. I KNOW WHAT KOMATSU BOOKS SAY, BUT WE'VE WORKED ON 100'S OF THESE DOZERS AND OUR LOCAL KOMATSU DEALER CALLS US FOR ADVICE.

THANKS,

KENT BAUGH EQUIPMENT www.ktbaugh.com

I have a Komatsu D21 and the steering controls don't seem to be responding as they should. Going forward, it doesn't want to turn left. In reverse, it doesn't want to turn right.

Could this problem be related to low oil levels (or wrong oil) in the transmission case and/or transfer, bevel gear case?

Is the trans/rear differential you speak of above the same as the transfer, bevel gear that I see on page 21 of the operator's manual?

Is the main clutch housing you speak of above and the transmission case on the D21 the same thing?

Just trying to figure out what oil I need for these...

Also just could not believe that I needed engine oil for the hydraulics. Is Rotella OK for that?

Thanks for your help. You guys are amazing.

 

[K5Cruz]

I have a Komatsu D21 and the steering controls don't seem to be responding as they should. Going forward, it doesn't want to turn left. In reverse, it doesn't want to turn right.

Could this problem be related to low oil levels (or wrong oil) in the transmission case and/or transfer, bevel gear case?

Is the trans/rear differential you speak of above the same as the transfer, bevel gear that I see on page 21 of the operator's manual?

Is the main clutch housing you speak of above and the transmission case on the D21 the same thing?

Just trying to figure out what oil I need for these...

Also just could not believe that I needed engine oil for the hydraulics. Is Rotella OK for that?

Thanks for your help. You guys are amazing.

I'd be interested in hearing ideas on the directional problem as well, my 21 has recently only been turning left when I pull the lever all the way to the stop.

 

[Danny B]

I have two questions. Probably read the answer in the past but can't remember.
1. I need to put in grease to tighten the tracks. Could not get the zerks to take it. Used an ice pick to make sure the ball was loose and spring was flexing. All seemed ok, but still wouldn't take grease. Any tricks or advise on this?
2. Right steering lever works great. Left is another story. I can get it to turn, but it pulls the engine. Apparently clutch is not releasing. Is there an adjustment I can do?
Well I guess I need a third question.
3. Where is a good source of manuals? I only have owners manual from dealer.
Thanks a bunch for all the good info you guys provide. And thanks to the newbies (like me) for asking all the questions.

 

[chuckster]

21 p

1st post. We have a 21p with rubber tracks that we use for fine grade and backfill operations that has been a great asset to our company.

 

[KTBAUGH]

Oils to use

Hello everyone,

these are the oils that we use on the d21:

Engine: 15w40 motor oil
transmission: 30w or 15w40 motor oil
rear differential: 90w gear oil
final drives: 90w gear oil

these are the oils that we use on the d20:

Engine: 15w40 motor oil
wet main clutch: 15w40 motor oil
transmission & rear differential: 90w gear oil
final drives: 90w gear oil
on the d20 the oil in the rear differential and transmission run together and fill at the dipstick at the rear of the floor.

Thanks,
kent baugh
www.ktbaugh.com

i have a komatsu d21 and the steering controls don't seem to be responding as they should. Going forward, it doesn't want to turn left. In reverse, it doesn't want to turn right.

Could this problem be related to low oil levels (or wrong oil) in the transmission case and/or transfer, bevel gear case?

Is the trans/rear differential you speak of above the same as the transfer, bevel gear that i see on page 21 of the operator's manual?

Is the main clutch housing you speak of above and the transmission case on the d21 the same thing?

Just trying to figure out what oil i need for these...

Also just could not believe that i needed engine oil for the hydraulics. Is rotella ok for that?

Thanks for your help. You guys are amazing.

 

[KTBAUGH]

Steering problems

Hello everyone,

your steering problems can be caused by a number of things:

Wrong oil type
bad steering clutch disks
oil leaking into the clutches
bearing failure in the clutch housings
bad brake bands
low oil pressure
bad piston seals

it is hard to diagnose a problem without running the dozer or talking to someone about the problems but maybe these ideas above will help out.

Thank you,
kent baugh
www.ktbaugh.com

 

[KTBAUGH]

Track tensioners

Hello everyone,

a common problem with the track tensioner is that they rust and freeze up inside not allowing them to take grease. You can try to replace the grease valve but this may not cure your problems.

Thank you,

kent baugh
www.ktbaugh.com

 

[Soquel_Ranch]

1st Post
I've had my D-21P7 for three years now and been amazed at how reliable and trouble free it's been. This forum has hopefully saved me some grief by pointing out some some weak points such as the steering clutch / brake, and recommended fluids, zerk care.

Is track tension/sag measured by laying a 2x4 on the treads?

Could someone submit a picture of the drain plug to confirm no oil in the clutch/brake housing?

Any hints on repairing the fiberglass sunshield (doesn't like oak limbs) or mounting an aftermarket ROPS and seatbelts?

BTW, I've driven the swamp treads short distances on an asphalt road to clear a downed tree without leaving marks. We unloaded it from the 4ft truck bed by backing up to a gravel pile, but don't recommend it because of the resulting steep angle. Plan on your new dozer showing up at dusk with the driver ia hurry...

 

[Soquel_Ranch]

1st Post
I've had my D-21P7 for three years now and been amazed at how reliable and trouble free it's been. This forum has hopefully saved me some grief by pointing out some some weak points such as the steering clutch / brake, and recommended fluids, zerk care.

Is track tension/sag measured by laying a 2x4 on the treads?

Could someone submit a picture of the drain plug to confirm no oil in the clutch/brake housing?

Any hints on repairing the fiberglass sunshield (doesn't like oak limbs) or mounting an aftermarket ROPS and seatbelts?

BTW, I've driven the swamp treads short distances on an asphalt road to clear a downed tree without leaving marks. We unloaded it from the 4ft truck bed by backing up to a gravel pile, but don't recommend it because of the resulting steep angle. Plan on your new dozer showing up at dusk with the driver ia hurry...

 

[Gregorb]

Oils to use in BD2F

Kent, should I use the 15W40 motor oil in the wet main clutch of a BD2F?
Thanks,

 

[KTBAUGH]

Oil to use

Hello gregorb,

you can use either 15w40 or 30w in the wet clutch.

Thank you,
kent baugh
www.ktbaugh.com

 

[Gregorb]

Thanks for the info Kent

 

[couchy]

motor type

I have a Komatsu D21P-7.
The Serial number is 76112. I have been told that some of the motors are 50 hp. Some are 40hp.
Is that right and if so what motor should be in mine.

Cheers,

Gary Couch

 

[Dozerboy28]

Komatsu D21P-6 question about shifting

I recently went and looked at a D21P-6. This is the first time I ever operated one of these little wonders and was definitly impressed, but I have a question about the shifting . When I would shift into forward 1 there was a little hesitation and then when shifted into forward 2 there was a hesitation. When shifting down it would do the same and also it would do the same on the reverse side. Just a slight hesitation between gears, but everything operated fine. Like I said this is the first one I ever operated, so is this normal.

 

[jwebb]

dozer parts

Hello everyone,
just joined this forum today because i see that everyone's having questions about the mitsubishi and komatsu dozers. We are a heavy equipment and parts sales company in east texas. We primarily sell parts for the smaller dozers but we can get parts for just about anything with our 2 parts locator systems. Send us a message if you have any questions or need parts for your equipment.

Thank you,

Kent Baugh Equipment

Kent,
How much do you get for a clutch cable for a D21 these days? Mine broke but have a temporary fix on it, but will probably replace it in the near future. BTW, thanks for your help on the lubrication issues. I Am doing some much needed maintenance on it this weekend.
Johnny