Direction To Slide Tandems

Topic 16421 | Page 2

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Duane C.'s Comment
member avatar

Thanks for the information

Compare the Drive weight with the Tandem weight. If the Drive is heavier, move the Tandems toward the heavy weight. If the Tandems are heavier, move the Tandems away (back) from the weight.

Secret mathematical formula: Subtract the smaller from the larger (just like in school). Divide that number by 500, round up (4.25 becomes 5). That is the number of 4" spaced holes to move.

Drives // Tandem: 31120 // 34760

Difference: 34760 - 31120 = 3640

Divide by 500: 3640 รท 500 = 7.28

Round "up": 8 holes. The heaviest is the Tandems, so move them back 8 holes. Do not get comfused here: to move the tandems back, you need to keep tandem brakes on and move the truck forward.

Tandems:

Tandem Axles

A set of axles spaced close together, legally defined as more than 40 and less than 96 inches apart by the USDOT. Drivers tend to refer to the tandem axles on their trailer as just "tandems". You might hear a driver say, "I'm 400 pounds overweight on my tandems", referring to his trailer tandems, not his tractor tandems. Tractor tandems are generally just referred to as "drives" which is short for "drive axles".

Tandem:

Tandem Axles

A set of axles spaced close together, legally defined as more than 40 and less than 96 inches apart by the USDOT. Drivers tend to refer to the tandem axles on their trailer as just "tandems". You might hear a driver say, "I'm 400 pounds overweight on my tandems", referring to his trailer tandems, not his tractor tandems. Tractor tandems are generally just referred to as "drives" which is short for "drive axles".

Ernie S. (AKA Old Salty D's Comment
member avatar

The way I always explain it is this:

Your tandems (trailer wheels) are stationary, move the load towards the smaller of the 2 weights. Example, you have 32425 on your drive axle, and 33967 on your tandems. With your trailer brakes set & pins released, pull the truck forward to move weight forward.

On average, most reefer trailers when you are moving your tandems, you move between 300 - 500 lbs per hole. So with this example, you would want to move your load forward (tandems back) 2 -3 holes to balance the load between drives & tandems. But also as was pointed out, you have to keep bridge laws in mind for the states you are traveling into/through.

Ernie

Tandems:

Tandem Axles

A set of axles spaced close together, legally defined as more than 40 and less than 96 inches apart by the USDOT. Drivers tend to refer to the tandem axles on their trailer as just "tandems". You might hear a driver say, "I'm 400 pounds overweight on my tandems", referring to his trailer tandems, not his tractor tandems. Tractor tandems are generally just referred to as "drives" which is short for "drive axles".

Tandem:

Tandem Axles

A set of axles spaced close together, legally defined as more than 40 and less than 96 inches apart by the USDOT. Drivers tend to refer to the tandem axles on their trailer as just "tandems". You might hear a driver say, "I'm 400 pounds overweight on my tandems", referring to his trailer tandems, not his tractor tandems. Tractor tandems are generally just referred to as "drives" which is short for "drive axles".

Reefer:

A refrigerated trailer.

Ernie S. (AKA Old Salty D's Comment
member avatar

Also, I forgot to mention, you are only needing to move 1/2 the weight to balance the load.

As in the example I gave, you only need to move 775 lbs, not the full 1550.

Ernie

Duane C.'s Comment
member avatar

Thanks Ernie S. I will try this and apply it to my daily job. I appreciate your help and advice.

The way I always explain it is this:

Your tandems (trailer wheels) are stationary, move the load towards the smaller of the 2 weights. Example, you have 32425 on your drive axle, and 33967 on your tandems. With your trailer brakes set & pins released, pull the truck forward to move weight forward.

On average, most reefer trailers when you are moving your tandems, you move between 300 - 500 lbs per hole. So with this example, you would want to move your load forward (tandems back) 2 -3 holes to balance the load between drives & tandems. But also as was pointed out, you have to keep bridge laws in mind for the states you are traveling into/through.

Ernie

Tandems:

Tandem Axles

A set of axles spaced close together, legally defined as more than 40 and less than 96 inches apart by the USDOT. Drivers tend to refer to the tandem axles on their trailer as just "tandems". You might hear a driver say, "I'm 400 pounds overweight on my tandems", referring to his trailer tandems, not his tractor tandems. Tractor tandems are generally just referred to as "drives" which is short for "drive axles".

Tandem:

Tandem Axles

A set of axles spaced close together, legally defined as more than 40 and less than 96 inches apart by the USDOT. Drivers tend to refer to the tandem axles on their trailer as just "tandems". You might hear a driver say, "I'm 400 pounds overweight on my tandems", referring to his trailer tandems, not his tractor tandems. Tractor tandems are generally just referred to as "drives" which is short for "drive axles".

Reefer:

A refrigerated trailer.

Sambo's Comment
member avatar

Easiest way. Imagine a board, with a weight on either end. Fulcrum point in the middle. What happens when you slide the Fulcrum right, where does the weight go. Now slide it left, now where is the weight?

Now stick 18 wheels under the board and a steering wheel and you got a truck!

smile.gif

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