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MAInTAInIng yOUr
X
ST 4WD TrUggy rTr
Following a simple maintenance schedule will ensure that your
X
ST 4WD Truggy RTR operates in top condition every time you use it.
It is strongly recommended.
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Check the foam air filter element for dirt blockage. If the foam air filter element is dirty, remove it from the air filter housing and wash
it in liquid soap and warm water. Dry the foam air filter element with a paper towel, reinstall it and 'wet' it with air filter oil.
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Check the chassis for any loose screws, especially the engine and the outdrive cup mounting screws. Tighten them if necessary.
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Any screws that are threaded directly into metal should be secured in place with threadlock. This will prevent the screws from loosening
during use. Screws threaded into nylon or composite material do not require threadlock.
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Do not overtighten any screws that thread into nylon or composite material or the material may strip out. Screws
threaded into nylon or composite material need only be tightened snugly.
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Check the steering linkage and the throttle/brake linkage for any signs of wear or misalignment. Tighten and/or
readjust them as necessary. Double-check that the grub screws in the collars are tight and threadlocked.
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Once in a while, remove the wheels and clean the wheel bearings, using a bearing cleaner. This will remove any dust
and grit that may, over time, damage the bearings. After cleaning the bearings, reoil them using a good quality bearing oil. Never run
the bearings dry or damage to the bearings will result.
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When you clean the wheel bearings as described above, also remove, clean and reoil the clutch bell bearings.
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Check the fuel system, including the fuel tank and fuel tubing, for any signs of cracking, splitting or looseness. Replace any fuel tubing
you suspect may be damaged.
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Check the condition of your transmitter and receiver batteries each time you drive your
X
ST 4WD Truggy RTR. If you think they might
need replacement or recharging, do so before driving your
X
ST 4WD Truggy RTR again.
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After a period of time the chassis will accumulate a lot of dirt and debris, especially around the engine area. This buildup should be
cleaned off using a high-powered spray cleaner like Emerald Nitro Car Cleaner.
Some nitro car cleaners will damage
anodised and/or plated parts. Test on an inconspicuous area first.
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After cleaning the chassis and engine with Nitro Car Cleaner, you should oil the moving parts of the chassis.
Do not
oil the clutch bell, spur gear, drive shafts (dog bones) or the brake discs.
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Always use new fuel and keep the cap on the fuel tightly closed. As fuel ages it absorbs water, which
degrades the fuel's performance and will cause erratic engine operation.
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After you have finished using your engine for the day, remove the glow plug and its washer from the
engine and squirt several drops of high-quality after-run oil into the glow plug hole. Pull the pull-start
cord several times to distribute the oil throughout the engine, then reinstall the glow plug and its washer.
This will prevent corrosion inside your engine.
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Never leave unused fuel in the fuel tank for more than a couple of days. The nitromethane and methanol in the fuel
will evaporate, leaving the oil behind. This will eventually turn into a thick sludge that will require replacement of the fuel tank to fix.
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If you need to remove the engine to clean it or change the clutch bell, etc., it's important that you set the gear mesh between the clutch
bell and the spur gear properly when reinstalling the engine; otherwise, the spur gear may be damaged or the gears may bind. To set
the gear mesh, first start by setting the engine mount assembly temporarily in place, then slide the engine back within the mounts
until the teeth on the clutch bell are even with the spur gear. When satisfied with the alignment, tighten the four socket-cap screws to
secure the engine to the engine mounts. Next, place a piece of notebook paper between the clutch bell
and the spur gear, and push the engine toward the spur gear firmly, so that the notebook paper crinkles.
When set properly, there should be very slight play between the gears. If the gears are too tight they
will bind and if they are too loose they will strip out. When satisfied with the alignment, tighten the four
hex screws on the bottom of the chassis. With the wheels off the ground, you should be able to spin the
clutch bell with your finger. The clutch bell should rotate the spur gear and other drivetrain components
rather easily. If it's difficult to rotate the clutch bell, your gear mesh is likely too tight. Readjust the gear
mesh, making sure to use a piece of notebook paper between the gears. When set properly, the paper
should be tightly crinkled, but not ripped or punctured.