Dozer Operations $(500)$ TRACK$-$TYPE

TRACTOR

$\%$ Grade vs$.$ Dozing Factor

$(-)$ Downhill

$1-111-$L$.$:$11$

ESTIMATING DOZER PRODUCTION

OFF$-$THE$-$JOB

Example problem:

Determine average hourly production of a D$8$T$/8$SU

$($with tilt cylinder$)$ moving hard$-$packed clay an average

distance of $45m(150$ feet$)$ down a $15\%$ grade, using a

slot dozing technique.

Estimated material weight is

LCY$).$ Operator is average. Job efficiency is estimated

at $50mi\frac{n}{h}r.$

Uncorrected Maximum Production $-458L\frac{m^2}{h}$

$(600LC\frac{Y}{h}r($example only$)$

Applicable Correction Factors:

Hard$-$packed clay is "hard to cut" material $...0\mathrm{.}80$

Grade correction $($from graph$)...............30$

Slot dozing. $..........................1\mathrm{.}20$

Average operator $.....................0\mathrm{.}75$

Weight eorrection. $............(230002650)0\mathrm{.}87$

Production $-$ Maximum Production $$ Correction

Factors

$-(600LC\frac{Y}{h}r)(0\mathrm{.}80)(1\mathrm{.}30)(1\mathrm{.}20)(0\mathrm{.}75)$

$(0\mathrm{.}83)(0\mathrm{.}87)$

$-405\mathrm{.}5LC\frac{C}{h}r$

To oblain production in metric units, the same proce$-$

dure is used substituling maximum uncorrected produc$-$

tion in $L{m}^{\text{'}}.$

$=458L\frac{m^2}{h}$ Factors

$=309\mathrm{.}6L\frac{m^3}{h}$

A D$8$T dozer is moving loose sand a distance of $200$ feet over level ground. The operation is using slot

dozing, with an average operator, a density of $1900$ pcy and an efficiency of $50$ minutes. The visibility

conditions are good. What is the production per hour?

If the Dozer costs $$42$ per hour $($including fuel$)$ and the Operator is $$24($including benefits$)$ what is the

cost per loose cubic yard?