Quote:
Originally Posted by Old Guy
Lou
Just thought I would give you this site for 2-56 Hex Head bolts looks like about a quarter of the price of American Model 2-56 SS X 3/8 is $6.10 per 100 http: www.microfastners.com/home.php?cat=576.
Thanks for pointing out sites to look for.
Earl |
I know they are not exact scale but they do add a bit more to the looks ..I dont see any philips heads on the one to one scales
Quote:
Originally Posted by ekim
Wow....tracksandtredlou you are where I hope to be when I retire. I hope to have a small network of friends and equipment when I retire to do just what you have done. Very nice Sir and keep posting please!
Michael (ekim)
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Thanks Michael ..really apreciate your comments
Quote:
Originally Posted by modelman
T-n-T-Lou-great work on a very complicated model. These look like the toughest to build out of all the construction models. Good job!!
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Tom at times I think I bit of way more then I can chew ..some things are working really well like the table rotation and mold table and others have been a nightmare ..the large servo for the articulation had to be replaced will hydros as the servo wasnt quite strong enough ..the steering had a few bugs in it as well and I messed with the linkage to get it working ok ..Having the front drive is creating a bit more strain but I think I will get these bugs worked out ..
The hydros now that has been a pain in the %$#...Last fall I bought a pump and 3 spool valve off a well know US ebay member ..I am not knocking him because im sure he wasnt aware of the problems with this product at the time. He bought 3 of these units and after emailing him about the problems he said they were all crap ..I thought i was getting a good deal and Paid over $400 for the pump filter and three spool valve ..A leimbach pump would cost that much ..Anyway this unit is pretty much a chinesse knock off of the leimbach ..spools are a touch larger ..The + side they used bearings on the spool cam ..4mm fittings and metal gear servos ..servos are very cheap but seem to be working well.. The pump looks very much like the leimbach as well ..Gears are a bit larger and the unit I quite a bit noisyer then the leimbach ..Buyer beware..The Valve leaked from the moment I hooked it up ..The pump was labouring and drawing way too much current and now leaking out the motor shaft ..I should of sent the whole thing back but It sat for months in the box before i set it up ..grader has been sitting on the shelf for months with a big puddle of oil under it
Well I am trying to recoupe some of this money i have spent of this so I am working out the problems one by one ..first the valve ..I tried replacing the o-rings and found the same thing happened .I made the oring grove wider and doubled up on the oring ..better now but still weeping a little on one spool ..may have damaged the o-ring when i put it back together ..I also found out the servos were bottoming out on the inward stroke..One servo broke the housing during the strain...after closer inspection the plunger was bottoming out and hitting the cap screws ..The cap screws another joke ...They were wrapped with teflon to try and seal.Idiots
Leimbach uses an o-ring on the seet ..I ended up using the valve servo ajustment caps that you remove from the valve .the same thread as the cap screws . I Cut the ends off and used 5x1 mm o-rings on the seat .Should be able to see in the pics ..seals and works way better ..Glued the servo and valves seems to be working ok now ..
Now the #$@%&* ..Pump After inspecting the pump I noticed the the is a extar line off the top of the pump to the tank for the releif valve ..Looking it over I noticed there was no way for the Oil to exit or pass the set screw when the PRV did open ..They were expecting it to bypass through the threads i guess ...NOT ..Idiots ..I just drilled a 1/16 hole through the center of the PRV set screw now the oil can bypass into the tank ..I dont have a guage but im thinking the pump may have creating too much pressure for these vavles ..Now the shaft is leaking on motor side ..Opened that up and the only thing i see is some type of neoprem bushing ..I put 3 layers of walbro carb gasket material under the shaft set screw and that seems to have worked ..time will tell..If I didnt get laid off last month I would be replacing the whole works with a leimbach set up..Live and learn