Dozer Operations

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Dozer Operations
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Dozer

• Pushes waste
• Spreads Cover Soil
• Low ground pressure
• Good Traction
• Good for pushing...not for Compacting.

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Vehicle Placement

• At the landfill, vehicles are directed to the
  appropriate tipping area.
• Proper vehicle placement is very important.

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Vehicle Placement-Other Considerations

• Vehicle placement may also be based on the time
  it takes to unload.
• Its usually more efficient and safer to keep
  commercial vehicles separated from self-haul
  vehicles.

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When and How to Push to the Face

• Pushing should generally be done with the dozer.
• Pushing
• move dozer to pile
• keep blade about 4 inches from ground
• push straight ahead
• keep grade

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Keeping Deck Clean
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Smooth and Well Graded
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Pushing to the Face

• Waste is pushed from the tipping area to the
  cell. Typically, a dozer performs this task.

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Pushing to the Face

• Transfer Truck Loads
• Requires large tractors
• Downhill is preferred
• Packer Truck Loads
• density, cohesiveness, type of garbage, unloading
  time
• Small (self-haul) Loads
• hard to handle waste, slow un-loaders

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Pushing Transfer Truck Loads

• Transfer truck loads are big and heavy
• Often 20 tons.
• These loads should be pushed intact.
• They should be pushed downhill.

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Pushing Packer Truck Loads

• Dont break apart
• Push along long axis

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Pushing Packer Truck Loads

• Push straight ahead as much as possible
• May need to break apart to push uphill
• May need to break apart to spread

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Packer Truck LoadsSticking Together

• With practice, packer truck loads can easily be
  pushed to the face intact
• This saves time, fuel and money

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Double Semi-U Dozer Blade

• This blade helps to break apart those packer
  truck loads
• It also directs trash to the tracks/wheels for
  optimum compaction

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Pushing Small (self-haul) Loads

• Self-haul loads are most efficiently pushed
  across the tipping area (as shown)this requires
  caution and good spotter support.

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Gathering Self-haul Loads

• When pushing self-haul loads, dont push straight
  into the cell
• Instead, gather a full load then push to the
  face
• Its more productive

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Pushing Waste - Option 1

• Some operators wait until waste piles up at the
  tipping pad before pushing it to the cell.
• They think that theyre saving money by waiting
  as long as possible before pushing.

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Pushing Waste - Option 2

• Other operators push as soon as any waste is
  dumped... even very small self-haul loads.

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Pushing Short or Long?

• All garbage must be pushed
• If it piles up, the average push will be longer

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Prompt Pushing Saves

• While there may be other factors, in most cases,
  pushing loads as they are dumped makes the most
  sense.

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Push Downhill When Possible

• Regardless of the cell construction method
  utilized, downhill pushing will typically be the
  most cost-effective
• What are some pros and cons of downhill pushing?

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Tips for Experienced Operators

• Measuring the dozers productivity
• Heres how to do it
• Optimizing Push Distance
• Look at both costs (tipping pad dozer)
• Its shorter than you think

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Optimum Push Distance

• Two Considerations
• Pad Costs
• Pushing Costs

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Push Costs

• Optimum push costs
• Push costs related to push distance

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Pad Costs

• Optimum pad costs
• Pad costs related to push distance

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Learn From My Mistake !

• We were proud of our ability to push long
• We thought we were cool
• It wasnt cool to waste 5,000 per day !

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Pushing Waste - What Should We Look For?
Break down the dozers cost into something you
can feel...
How about cost per push? At a 500 tpd landfill
(mostly route trucks) does a survey (counts
pushes) and finds that the D8 Dozer makes105
pushes each day. It spends 7 hours pushing
(includes gather, push, spread, return). The
rest of the time is spend in travel, service,
etc... The machine costs 125/hour to operate.
How much does each push cost?
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Calculating the cost per push
7 hours/day x 125/hour /105 pushes 8.33 per
push
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Working With Cost per Push
The goal is to change your perspective and
re-focus your effort
Can you decrease the cost per push? Or make fewer
pushes per day? How about some ideas?
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How about cost per foot?
During the survey, you also determined that the
dozers average push distance (tipping pad to
cell) was 110 feet. Calculate the /foot... 7
hours/day x 125/hour / 110 feet 7.95 per foot
(per day).
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Working With Cost per Foot
Again, the goal is to change your perspective and
re-focus your effort
Can you decrease the cost per foot? Or can you
push shorter? How about some ideas?
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Take Off Those Rose-Colored Glasses of Tradition
Have another look at your dozer
Chances are, you see the dozer pushing waste many
times each day. After a while you dont even
think about it. A long push is just that A
darn long push. But when you think of it in
terms of it costing you 7.95/foot, it takes on
another meaning. A few extra pushes...no big
deal. Wait a minute! Pushes cost 8.33 each.
With that in mind, its better to let the dozer
sit (idle or turned off) if theres nothing to do.
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Maximize Your Productivity

• Push straight
• Push downhill
• Slot dozing
• Side by side dozing
• Push full loads
• Dont be a clean freak let it pile up.