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  • 拖曳半掛車時為什麼要移動第五輪？第五輪

4 月. 25, 2024 15:27 返回目錄

拖曳半掛車時為什麼要移動第五輪？第五輪

You’ve hooked up your trailer and you’ve headed to a weighbridge and the bad news is that your front (steering) axle is overloaded. An overloaded axle is both illegal and dangerous. It can overheat your tyres, make your braking performance much worse, affect your steering and even cause a jackknife if it’s bad enough.

Whoever loaded the trailer has put too much weight at the front, but you don’t have any ability to change that, so what can you do?

 

JOST TAPE 第五輪 37C 修理套件拖車零件

Why would you move a fifth wheel when towing a semitrailer? Fifth Wheel

 

如果你有滑動 第五輪, you can move the load backwards so that more weight is over the tractor unit’s drive axles.

Why would you move a fifth wheel when towing a semitrailer? Fifth Wheel

It’s common for drivers to move the fifth wheel, not only for weight distribution, but also to get the best aerodynamic performance from the vehicle. A smaller distance between the cab and the trailer makes for better fuel economy, but it’s not always possible to do this if the front of the trailer is heavy because too much weight will be over the steering axles.

Add to this the complication of full vs empty fuel tanks (diesel weighs around 8 pounds per gallon) and you’ll see it’s difficult to calculate an exact weight distribution.

如果您的牽引車有可移動的第五輪，駕駛室後面會有一個開關可以解鎖。

Why would you move a fifth wheel when towing a semitrailer? Fifth Wheel

When the fifth wheel is unlocked, it can slide on this notched rail. Each notch represents a certain percentage of weight distribution forwards and backwards – you’d need to check the manufacturer’s documentation to know just how much.

Why would you move a fifth wheel when towing a semitrailer? Fifth Wheel

Why would you move a fifth wheel when towing a semitrailer? Fifth Wheel

如何移動滑動第五輪

  1. 確保拖車煞車已啟用，且半拖車已牢固連接
  2. The trailer must be in line with the tractor unit – you can cause damage if it isn’t
  3. 使用開關解鎖第五輪
  4. 將原動機向前移動，將重量平衡轉移到驅動輪上，反之亦然
  5. 在牽引車上拉上駐車煞車
  6. 下車並鎖上第五輪
  7. 在地磅上再檢查一次

放下拖車後，請將第五輪放回正常位置。

檢查什麼

  • Before you try to move the trailer, check both slider plunger pins are out (there’s one either side)
  • Once you’ve moved the trailer, ensure that both slide plunger pins have moved back in. If they won’t go back in, move the tractor unit forwards or backwards slightly to take any pressure off the connection
  • 檢查設備是否定期維護，並有足夠的潤滑脂
  • Do a tug test before you drive away – if the pins are unlocked, the first time you brake, the trailer will slide forward and break the coupling.

你能移動你的第五輪嗎？

並非所有第五輪拖車都可以在與拖車連接時移動。該第五輪可以移動，但只能透過鬆開螺栓並向前或向後滑動才能移動。

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