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  1. M

    Komatsu D31A Losing Power

    I was using my Komatsu D31A-17 dozer (approx 1984) to fill in old pond. Engine was running strong for the first hour. It then started to lose power as if lacking fuel (no black, white, or blue smoke). Checked fuel level and it was approx 1/8 full. Added enough fuel to bring it to 1/4 full...
  2. M

    Wanted- TS14 or Cat 627 Scraper

    Need twin engine scraper in working condition. Need to complete two stormwater ponds and 1/2 mile of road. Would consider TS14 or Cat 627 (no need for push cat). Malcolm 403 863-2150 Calgary Alberta Canada
  3. M

    Komatsu D31 Dozer Will Not Move

    My problem was plugged strainer on the transmission. 1. Drain oil from transmission 2. Remove strainer plate on front lower corner of trans. Clean strainer. I also removed pump housing on front of trans. Everything looked good. 3. Reinstalled strainer, sleeve, pump housing using new...
  4. M

    Komatsu D31 Dozer Will Not Move

    My D31A-17 dozer (hydrashift) was working fine up until a week ago. I started to hear a change in the sound coming from the machine. It only occurred at operating temp- a whine like a pump being starved for oil. It seemed to be coming from just behind the motor ie hydraulic pump. I changed...
  5. M

    Quick Fix to Track Adjuster Assy

    Thanks for the info Motat. I took a closer look today with the help of a friend far more knowledgable than I. The broken spring has allowed the yoke rod and inner cylinder to go out of line. When working on the flat no big problem. When on sideslope, track moves to the outside. Because of this...
  6. M

    Komatsu D31 P 16 track issue

    Mike I have d31a. I was working ditch sideslope and left track shifted inward causing loud clicking on rear sprocket. Visually track seemed to have correct tension, no sag in top portion of track. Upon inspection found that track adjuster spring was broke, no shims on track rail where front...
  7. M

    Quick Fix to Track Adjuster Assy

    Two days ago when working a ditch sideslope with my Komatsu D31A, I heard a loud clicking coming from the left side of the undercarriage. Upon inspection, found that track was trying to run off the sprocket (misaligned). Took the cover off the track adjuster assy and found that the main tension...
  8. M

    Komatsu D31A-17 ENTIRE TRACK ADJUSTER ASSY NEEDED!

    Due to combination of dirt and major water/ humidity, I am in need of a LH track adjuster assembly. And I do mean entire- spring is broke due to corrosion, case that holds the spring has holes in it, bolts are gone. The only part that looks okay is the grease zerk. Any help with used or new...
  9. M

    Good Source for Shop/operator manuals for Komatsu D31A-17?

    Just purchased my first dozer- D31A-17. What is a good source for shop and/or operator manuals? Also looking for a new fuel cap (threaded screw on). Local Komatsu dealer wants $70.
  10. M

    Recommend Komatsu D31A with 6 way?

    I am looking for a dozer with a 6 way blade to finish 1/4 mile of road, create 2 stormwater ponds and cut and fill (small amounts) on my acreage. No trees or rocks. An old fellow has a Komatus D31A for sale (approx 500 miles away). He says it is in good shape and only needs rockguards. The...
  11. M

    Anyone with knowledge of American 35A Excavator

    I have the chance to purchase an American 35A excavator for approx $8K. It aint pretty but all controls work. I would be using it on my acreage to finish a road and dig two stormwater ponds. Anyone out there with info on this big old girl- operation, durability, ease of getting parts. Engine is...
  12. M

    Coolant in Oil - 471 Detroit

    Where would I find the serial number on this engine? I would like to get as much info as possible before tearing apart.
  13. M

    Coolant in Oil - 471 Detroit

    John The rad opening on my terex is a screw on cap approx 3-4 inch diameter. What did you use or make to be able to pressurize the cooling system? An automotive rad tester just doesn't do it.
  14. M

    Coolant in Oil - 471 Detroit

    Placed the oil cooler into a dunk tank today, no evidence of any leaks. From the previous threads it sounds like three possibilities- cracked head, seal on water pump, or o-ring between head and block. To narrow it down, I would like to try some further testing. Filling and pressurizing of the...
  15. M

    Coolant in Oil - 471 Detroit

    Thanks for all the quick replies. If the oil cooler is not the problem (get tested Monday), is there a test to make sure that the problem is a cracked head (bubble test, dye, pressure test, etc)? The local dealer I spoke to said that the oil pan could be dropped and then the radiator...
  16. M

    Coolant in Oil - 471 Detroit

    I have a Terex scraper S7 (1976) with a 471 Detroit in it that is used sporatically to haul clay or dirt. Besides oil leaks and wet stacking when idling the engine ran strong. Not so good any more. Three weeks ago, the temperature guage went to maximum. Coolant was low so I added. That is...
  17. M

    Need Hydraulic Pump for 1984 Bomag BW 170 PD

    I am need of a hyd pump for Bomag BW 170 padfoot packer. Engine is Deutz. Pump was removed and is no longer with machine. Any suggestions?
  18. M

    Elevator on Terex S7

    This S7 did have a separate engine (Detroit 2-71) that powered only the elevator through two right angle drives and shafts. The bowl and elevator was built by Hancock. The engine is seized and badly damaged. I do have both angle drives and and shafts. I put in question about the JD 762...
  19. M

    Elevator on Terex S7

    This fall I changed most of the filters and oils on the S7 that I purchased. My father in law who is an old contractor and ran TS 14 for a few years said it missed at idle but sounded great while working. I put a total of 3 - 4 hours on machine. I am not good but I have figured out a few things...
  20. M

    Terex S7 Questions

    Thanks for all the info wabcoman. It is the 471. Tomorrow I put in fresh filters and oil.
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