LST Rebuild
08-24-2011, 03:55 AM
LST Rebuild
Just recently got a old well used LST figure would post as I do repairs and upgrades.
Ok its been a year since I got back into the RC hobby with any real time and money put into it. Had a local off road track open up so I dusted off my old E Rustler took it to the track and what I thought was a fast RC was not so any more. It is one of the originals that where released back int he day. Well over the year I have done a lot of upgrades from getting rid of the old mechanical speed control to beefing it up to take brushless and lipo power. So went from doing say 10km/h tops with the old stock motor setup to now getting 68 km/h. With that achieved my eyes began to wonder looking for the next RC to work on. Been looking at every thing from Crawlers to Helicopters. Was in my local swap shop and spotted this rather larg RC truck sitting on a shelf in the back. Asked the owner about it and found that it was due to come out.
He brought it out and showed me it; well I think it was love at first look. Even though I did not thing I would do anything with Nitro the truck was calling my name. I asked how much and he said make an offer so I did some research here on the forum and on Losi's site and other web sites. Came up with a price range and went back in. I offered him $100 cdn for it and he asked for $125. I dug out my rc savings and bought it.
The truck came with everything but more fuel and a fuel bottle. Took me a few tries to get it to go more things to have ready to fire up the motor than electric. Like charge the roto start and glow heater. I got it to fire up and it ran ok but would bog down when I tried to put full throttle and stall out. I was alright with that was just a test run to make sure all was working before I would tear it down and clean and replace some parts that where broken. Should have taken off the gear cover before starting it. Would have found that the low speed pinion gear was lose and worn out as much as it was. Well lesson learned there.
Now I have begun the tear down and cleaning. So-far I found I need to replace at least both the pinion and spur gear for the low gear. Since Losi offers a full package for both high and low will get that and start fresh there. Will replace the gear cover with a RPM setup. Have a new motor mount on the way to replace the one that was broken when I got it. Missing some screws so going to order a whole set,and lots of lock tight. Thinking of going with RC Screws stainless steel set. Will need a few gallons to of fresh shock oil those things are huge on it. Shock covers from Bad horse they are great at keeping the shocks clean and free of debris.
Any other suggestions on what should be done?
Here are some pics as it was when I purchased it and as far as I have done the break down.
08-24-2011, 05:31 AM
08-24-2011, 06:22 AM
RE: LST Rebuild
08-27-2011, 05:23 AM
RE: LST Rebuild
Just recently got a old well used LST figure would post as I do repairs and upgrades.
Ok its been a year since I got back into the RC hobby with any real time and money put into it. Had a local off road track open up so I dusted off my old E Rustler took it to the track and what I thought was a fast RC was not so any more. It is one of the originals that where released back int he day. Well over the year I have done a lot of upgrades from getting rid of the old mechanical speed control to beefing it up to take brushless and lipo power. So went from doing say 10km/h tops with the old stock motor setup to now getting 68 km/h. With that achieved my eyes began to wonder looking for the next RC to work on. Been looking at every thing from Crawlers to Helicopters. Was in my local swap shop and spotted this rather larg RC truck sitting on a shelf in the back. Asked the owner about it and found that it was due to come out.
He brought it out and showed me it; well I think it was love at first look. Even though I did not thing I would do anything with Nitro the truck was calling my name. I asked how much and he said make an offer so I did some research here on the forum and on Losi's site and other web sites. Came up with a price range and went back in. I offered him $100 cdn for it and he asked for $125. I dug out my rc savings and bought it.
The truck came with everything but more fuel and a fuel bottle. Took me a few tries to get it to go more things to have ready to fire up the motor than electric. Like charge the roto start and glow heater. I got it to fire up and it ran ok but would bog down when I tried to put full throttle and stall out. I was alright with that was just a test run to make sure all was working before I would tear it down and clean and replace some parts that where broken. Should have taken off the gear cover before starting it. Would have found that the low speed pinion gear was lose and worn out as much as it was. Well lesson learned there.
Now I have begun the tear down and cleaning. So-far I found I need to replace at least both the pinion and spur gear for the low gear. Since Losi offers a full package for both high and low will get that and start fresh there. Will replace the gear cover with a RPM setup. Have a new motor mount on the way to replace the one that was broken when I got it. Missing some screws so going to order a whole set,and lots of lock tight. Thinking of going with RC Screws stainless steel set. Will need a few gallons to of fresh shock oil those things are huge on it. Shock covers from Bad horse they are great at keeping the shocks clean and free of debris.
Any other suggestions on what should be done?
Here are some pics as it was when I purchased it and as far as I have done the break down.
Good upgrades to an LST1 is the LST2 conversion kit. Bigger axles, beefier suspension arms, 17mm wheel hexes (better than the 14 or 15mm that come on the LST1/AFT/MegaBaja, and beefier chassis rails. Its spendy at around $130USD, but well worth the extra beefiness.
Next would be the LST2 spec spur gear setup. Has bearings instead of bushings, the 2nd gear clutch hub is all aluminum instead of just an aluminum ring in a plastic spur gear, and I highly suggest dumping the Reverse and High/Low in the transmission in favor of the Losi Forward Only kit. The truck loses weight, rotating mass, and if you do the "gear flip mod" it'll go faster too. I did this to both of my LST2's. There are other upgrades that can be done but those are IMO the best ones to start with if you want a really tough basher.
I love Losi monster trucks.
08-27-2011, 12:13 PM
RE: LST Rebuild
Was also wondering about the how close to the end of the drive shafts are on the trani is it normal to be only a millmeter from the ends?
08-27-2011, 02:44 PM
RE: LST Rebuild
Ok great ideals. Will change the heat sink. Need new gears so will look at the conversion.
Was also wondering about the how close to the end of the drive shafts are on the trani is it normal to be only a millmeter from the ends?
Here's a pic of my .28 truck. Its hard to see, but if you look closely you can see where the dogbone is sitting in the drive cup.
08-28-2011, 12:29 PM
RE: LST Rebuild
Ok cool so it is a normal setup then.
08-29-2011, 08:54 AM
RE: LST Rebuild
I think that the truck is going to be about a pound or two lighter by the time I finish cleanining all the dirt off it. Don't think it was ever cleaned. Also been finding more parts that need replaced, but I am having fun all along the prosess and thats why Igot it.
09-01-2011, 04:32 PM
RE: LST Rebuild
I looking to replace the AA pack that came with it. Should get a hump back pack or laydown style?
Will be droping in a digital receaver and servos into the Beast.
09-04-2011, 09:40 AM
RE: LST Rebuild
While doing the tear down I noticed it almost looks like it could be set up with rear steering. Was this ever a setup for the LST? Just odd to have a spot for a fourth servo.
I think that the truck is going to be about a pound or two lighter by the time I finish cleanining all the dirt off it. Don't think it was ever cleaned. Also been finding more parts that need replaced, but I am having fun all along the prosess and thats why I got it.
Well tear down is done and have started degreasing and cleaing up the gear and other moving parts. Lots of sand and such all around, also there is a hole in the trany case. So add a new case to the wish list.
I looking to replace the AA pack that came with it. Should get a hump back pack or laydown style?
Will be droping in a digital receaver and servos into the Beast.
09-04-2011, 05:23 PM
RE: LST Rebuild
Ok great. Might be a fun experiment to convert the rear into steering though it only runs on one servo. Will get it all back up and running before do that.
Was wondering where the battery pack should go it was just duct taped to the top of the receiver box when I got the truck.
09-04-2011, 07:45 PM
RE: LST Rebuild
Ok great. Might be a fun experiment to convert the rear into steering though it only runs on one servo. Will get it all back up and running before do that.
Was wondering where the battery pack should go it was just duct taped to the top of the receiver box when I got the truck.
You need Losi part LOSB2351. Battery mount for lst2. Depending on the age of your chassis plates, you might have to drill holes if they aren't already there but this is what I have. The Maxamps 1600 packs are a little big for the mount, so using longer screws works perfect.
It's under chassis parts here: http://www.Losi.com/prodinfo/files/p...osion_lst2.pdf
09-04-2011, 10:18 PM
RE: LST Rebuild
09-05-2011, 04:21 AM
RE: LST Rebuild
Ok cool, Like your air boat pic. Built one back in High school was actually a class that was offered. Found the old electric motor and prop I used; lost the aluminum body long ago though.
09-11-2011, 11:22 AM
RE: LST Rebuild
10-14-2011, 12:06 AM
RE: LST Rebuild
12-11-2011, 04:01 PM
RE: LST Rebuild
12-15-2011, 08:57 AM
RE: LST Rebuild
12-15-2011, 09:55 AM
RE: LST Rebuild
As for rims, any 40 series.. Don't know Maximizer offset sizes.. 40 Series though is what the stock ones are - pretty much.
12-15-2011, 04:45 PM
RE: LST Rebuild
Here is there web site.
http://www.maximizerproducts.com/
For 3.2” monster truck tires also know as Maxx size or MT.
12-15-2011, 11:44 PM
RE: LST Rebuild
I read up on this lots, had people tell me the cam was worn, of flawed from factory, or I needed to clean the 2-speed, or do this or do that. All useless IMO. IMO the design of the truck somehow just doesn't allow for the 2-speed to work right with the smaller, lighter tires. I literally tried three whole separate transmissions, three 2-speed units, went to a new clutch, experimented with tightening the slipper all the way down, cleaned everything repeatedly, you name it. After the last time, having installed a brand new clutch and brand new 2-speed and brand-new XXL transmission, and taking it out to have it start slipping out and disengaging within half a tank, I have given up completely on running truggy tires on it. Unfortunately. Because as it's setup now, it handles really well on the track..
So anyway, yeah, that's my explanation..
Get some Axial 40 series rims or something. Or 40 series anything - but not MT or LPR...
12-16-2011, 04:34 AM
RE: LST Rebuild
Will look for the 40s for the LST. Now did you have your revers gears in with the smaller tires?? I am keeping the revers because it is handy when out bashing and you get stuck against something.