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Tamiya Toyota Land Cruiser 40 - #58405 (Radio Controlled Model Review)

1/10 Scale Electric Rock Crawler - CR-01 Chassis:

  Released by Tamiya on April 23, 2008, the Toyota Land Cruiser 40 was the first Tamiya model based on the 4WD CR-01 Rock Crawler Chassis.

Tamiya Toyota Land Cruiser 40 - #58405 CR01
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  The ladder framed CR-01 chassis, employs two metal side bars, jointed by a number of fixed and pivoted ties and struts to allow it to twist and flex. Two bevel gear type differentials enclosed in tough plastic axle housings are employed with a third orbital gear differential mounted in the centrally positioned gearbox with the 540 motor. Two universal drive prop shafts link the axle drives to provide excellent controlled handling.

  The suspension uses four oil filled dampers set at 45 degrees and four coil springs separately mounted behind each wheel.

  Four huge 125mm tires are perfect to traverse all types of rough and rocky terrain with ease. In my opinion this is one of the best Tamiya Radio Controlled model designs to date.


      Rating: 4.54.5 Stars out of 5 Reviewed by: RCScrapyard     Manual.

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Tamiya Toyota Land Cruiser 40 #58405 CR-01 - Chassis
Tamiya Toyota Land Cruiser 40 #58405 CR-01 Chassis
Tamiya Toyota Land Cruiser 40 #58405 CR-01 - Chassis
Tamiya Toyota Land Cruiser 40 #58405 CR-01 Body Shell

Buying a Used Tamiya Rock Crawler (and What to look for)


   Buying a used Tamiya Rock Crawler, or any used RC Model, has a number of advantages. It is generally cheaper than new, ready built and may come with a variety of expensive hop-ups already installed. Cheap, pre-loved bargains are always becoming available. However, depending on the age of your purchase, it may need a little tender loving care before you can take it out on the back yard.

   The one thing you will always need is an instruction manual. If not supplied with your purchase, they can often be downloaded from the Tamiya Racing website, or purchased separately on eBay. With an instruction manual, any problems with your model Rock Crawler you may discover, can easily be fixed.

Dampers
   When you receive your used Tamiya model, make a general visual inspection of the chassis, front and rear wishbones, suspension shock towers etc, for any broken parts that may need to be replaced. Then, take a screwdriver and box spanner and check each self tapping screw and nut for security, taking care not to over tighten.

   Next, for those Tamiya models with oil filled shock absorbers, remove them from the chassis and dismantle the coil springs. The damper shafts should push in and pull out with a smooth action. If you feel a jolt as you change direction, this means the oil has leaked out and must be topped up. At the same time, change the O-Ring seals to prevent more leakage. Also check the damper shafts for damage. If they are scratched, change them as soon as possible.

   If the body shell of your Rock Crawler is broken, ripped or damaged in any way, this can be easily repaired with rubber solution glue. Also, for added protection and if available for your model, fit an under guard to stop dirt and gravel entering the chassis.

Titanium Turnbuckles
   Examine the drive shafts for wear and replace as required. If possible, change them for titanium. The steel shafts wear and bend too easily.

   The gearbox of your used Rock Crawler should be opened up to check for damaged gears and wear. If there is excessive backlash in the gearing, these should be replaced. A thin coat of grease on the gears is enough to allow smooth operation and reduce further wear.

Spur Gears
   Gears are a weakness on all RC models. Head on collisions can easily damage the gear teeth on nylon and plastic spur gears. Heavy impacts can also loosen the nuts or self tapping screws that hold the motor in Position, allowing the pinion gear to pull out of mesh slightly and rip the tops off the teeth on your spur gear. To minimise this possibility, fit bolts with locking nuts to the motor mount and remember to check them for security after every two or three runs.

   The steering servo is also prone to damage, the fragile gear teeth of the servo can be broken off, rendering your expensive servo useless, so be sure to obtain a good quality "Servo Saver". Check out my Servo Information article.

Ball Bearings
   If your used Tamiya Rock Crawler comes with plastic and sintered brass bushings (ring type bearings), check the shafts that run in them for wear. Dust and grit can get into these bearings and abrade the shafts. Therefore, you should replace them all with shielded ball bearings. If the model has been run with ring type bearings, you may have to change all the axles and driveshafts. For more information, take a look at my article, How to get the best from your Bearings.















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Tamiya Toyota Land Cruiser 40 - #58405 CR-01


General Information and Advice

   RC is one of those sports that can be simply bashing around the back yard, or taken to the extreme of National and International Racing: For those who would like to enter this world of miniature Models, here are a few basic Hints: Firstly, buy a Kit not an RTR. Then, if something does break on your model, the experience you gain by building the kit will give you some idea how to fix it.

   Radio Controlled Model Cars are easily broken. Wishbones, Suspension Shock Towers, Dampers etc are prone to damage, so make sure you have a good strong front bumper and never run your car without its Body Shell in place.

   The Steering Servo is also a weakness, so if your kit does not have one, get yourself a good quality Servo Saver. I would also recommend you replace the soft steel Turnbuckles, Tie Rods and pivot/steering shafts with Titanium versions and if you get serious about your racing, lightweight Titanium Drive shafts, dog bones and CVD (Constant Velocity Drives). The standard steel ones bend far too easily.

   Gears in RC model cars often cause problems. Head on collision accidents can damage gear teeth on Nylon/Plastic Spur Gears and sometimes even the Bevel Gears inside the Gearbox. Hard impacts may also slacken the nuts and self taping screws that fix the Motor in Position, making it possible for the Pinion Gear to pull out of mesh a little and damage the teeth on your Spur Gear. To try and prevent this, you should always fit locking (Nyloc) nuts and if your mount uses self tapping screws, change the plastic motor mount occasionally to ensure a tight fit.

   Plastic Ball Connectors can cause problems. For top level Radio Controlled model car racing, they need to be checked for tightness and if considered necessary changed after every race meeting. Something like a loose fitting connector popping off could easily lose you the race, so always err on the side of caution.

   Quite a number of New car kits come with Plastic and Sintered Brass Ring type bearings. These can cause problems if at some time in the future you want to fit a full set of ball bearings so I recommend you discard the brass and plastic types before installation and get yourself a Hop-up set of Shielded Steel Ball Bearings.

   Finally, try to keep the Centre of Gravity of your model as low as you can. This can vastly improve the handling of your car when cornering at high speed. For On Road Drift/Touring cars the Ride Height should be around 5mm, for Buggys, Trucks, Truggys and Monster Trucks, as low as practical for the track conditions. Body Roll can be reduced by using Stabilizers, Anti roll or Sway Bars. Tuning Springs may also help with thicker, or thicker Silicon Oil in the Shock Absorbers. Also look towards mounting the Transponder as low as you can in the Chassis.

For Car Setup Information check out our Hints and Tips page.

Hints and Tips

Tires for RC Models

Rubber Tires:

   Rubber Tires ALWAYS should have either soft sponge or rubber inserts. They will not function as they should without them. And if you are totally serious about your racing they should be glued to the rims.

   You should also have at least three different compounds (Soft, Medium and Hard) for varying track temperatures in On Road tarmac racing Touring cars and varying pin sizes for carpet and Off Road racing Buggys and Trucks.


How to Mount Rubber Tires onto Wheels/Rims.

   Before mounting your Tires, I would recommend talking to the more experienced racers at your local club, as to what inserts they use. Even the top level racers rely on a bit of local knowledge on tracks they have never raced before.

1/   Once you have decided what inserts to use, position them inside the Tires ready to go onto the rims.

2/   You will need strong fingers to pull and maneuver the Tires over the rims, so you may need the help of an adult. I would recommend NOT using metal Tire levers or a spoon as they can not only damage the fragile plastic rims but can also put small tears in the rubber, that could cause problems later.
   The technique I recommend, is to first of all hook the Tire on one side of the rim, then using the thumb and forefinger, grip the Tire and pull it upwards and over into position around the middle of the wheel, then over to its final position on the far side so that the beading is seated in the spigot. then position the near side beading in the opposite spigot making sure the sponge (or rubber) insert is not trapped and positioned centrally.

3/   You have the option of either gluing or not gluing your tires in position. If the track you race at is not too grippy you can get away with it, but on high grip tracks there is the possibility the tire might pull away from the rim and ruin your race.
My recommendation is to glue them.
   Superglue is the thing to use. To do this, carefully pull the beading out of its seating, put on a spot of glue, then quickly push it back down. repeat this at least 6 times around each side of the wheel.
Superglue can be dangerous, so this is best done by an adult.

For More Setup Information check out my Hints and Tips page.









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