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CEC Service FAQ

 

Screen-It  
  Deutz® engine gets too hot and shuts down at 245 degrees
  6x16 screen basket is hard to start on cold mornings
  Screen-It feed belt is hard to track
  How often should I grease the 5x12 screen bearings?
  How often should I grease the 6x16 2 deck screen bearing?
  Can I change the speed of the Screen-IT discharge conveyors?
  My screen cloth has a hole in it
Cone  
  What type of oil is required for CEC cone lubrication?
  What should I torque the cone u-bolt to on the concave liner?
  How tight should the electric motor drive be?
Jaw  
  What type of oil should I use on a CEC Jaw crusher bearing and how much?
  Why does my Jaw crusher have two sight gauges for the pitman?
  How much grease is needed for the labyrinth seal?

Screen-It

Question 1: 

Deutz® engine gets too hot and shuts down at 245 degrees

Answer: 

  • Clean dirt and debris from cylinder heads
  • Check condition of blower fan, it may be worn
  • Check air filter, a plugged filter can cause higher engine temperatures
  • Make sure the engine exhaust air is not being restricted

 

Question 2: 

6x16 screen basket is hard to start on cold mornings

Answer:

  • Check drive belt tension
  • Check engine RPM. The RPM should be at maximum when starting the screen
  • Check blocking to make sure the screen basket is not making contact with the feeder head pulley while engaging
  • Run conveyors for several minutes before starting the screen, this will take the chill off of the oil allowing the screen to start easier

 

Question 3: 

Screen-It feed belt is hard to track

Answer:

  • The feed belt travels at a maximum of 50 feet per minute and is 48 inches wide. 
  • The belt is also very flat. 
  • When tracking the belt, be patient and allow time for the conveyor to respond.  You will not see immediate results. 
  • The slack adjusters are designed to tension the belt only. 
  • There is a self correcting return idler to assist in the belt tracking.  Check to see if the self correcting idler is free to pivot.

Question 4: 

How often should I grease the 5x12 screen bearings?

Answer: 

  • Each 100 mm screen bearing should be greased (from a hand pump grease gun) per hour of operation.
  • If you screen for 8 hours, you should pump 8 pumps of grease per screen bearing.

Question 5: 

How often should I grease the 6x16 2 deck screen bearing?

Answer: 

  • The 6x16 screen has 140 mm oil bath bearing.
  • The reservoir holds 5 gallons.
  • Oil should be chevron delo 80w-90 or equivalent
  • Older models did have a grease zerk, it should receive 3-4 pumps of grease per day
  • The grease forms a dust seal to protect the actual oil seal

Question 6: 

Can I change the speed of the Screen-IT discharge conveyors?

Answer:

  • A standard machine has a fixed speed conveyor except for the feeder belt
  • Flow controls are optional and can be installed in the field
  • All of the side discharge conveyor motors have the same diameter shaft size and bolt pattern, they can be switched to change speeds
  • The pump for each conveyor has a different flow rate to increase the adjustability

Question 7: 

My screen cloth has a hole in it

Answer:

  • If a screen panel wears out, it will form as a hole
  • The wires will be worn thin approaching the hole
  • If the screen panel breaks down the length of the clamp rail or the crown rail, it is due to loose clamp rails
  • If the clamp rails are not tight enough, the screen panel will be loose and the screen will flex up and down along the edge.  Eventually it will break

Cone

Question 1: 

What type of oil is required for CEC cone lubrication?

Answer:

  • CEC recommends chevron delo 80w-90 or equivalent for the cone lube in the following cone crushers:
    • 36"/40"
    • 450
    • 48/51"
    • 54"
    • 60"

Question 2: 

What should I torque the cone u-bolt to on the concave liner?

Answer:

  • The torque should be:
    • 36"/40" - 450 foot pound
    • 450 - 525 foot pound
    • 48"/51" - 600 foot pound
  • The super cone SC series does not contain u-bolts to hold the liner in place.  It has a unique locking ring that torques to:
    • SC 200 - 250 foot pound
    • SC 300 - 350 foot pound
    • SC 400 - 425 foot pound

Question 3: 

How tight should the electric motor drive be?

Answer:

  • On average the belts should be tensioned to 1/16 inch deflection per inch of span at a 20 pound pull
  • Belt tension gauges are available for accurate belt tensioning

Jaw

Question 1: 

What type of oil should I use on a CEC Jaw crusher bearing and how much?

Answer:

  • CEC recommends Chevron 80w-90 for the main frame pitman bearings
  • The pitman bearing are oil bath bearings and there is a sight glass on the front of the pitman to show proper oil level
  • The main frame bearings have a dipstick on each bearing and the reservoir is considerably smaller than the pitman bearings
  • The oil level should be checked daily

Question 2: 

Why does my Jaw crusher have two sight gauges for the pitman?

Answer:

  • The upper sight gauge is used if the jaw is mounted level 0 degrees
  • The lower sight gauge should be used if the jaw is mounted at an 8 degree angle
  • Almost all CEC portable Jaw crushers are mounted at 8 degrees

Question 3: 

How much grease is needed for the labyrinth seal?

Answer:

  • The labyrinth seal should only be greased while the jaw is running
  • You should pump grease from a hand pump grease gun until you just begin to see new grease emerging from the seal
  • You should not grease the seal again until the grease begins to dry out
  • Grease intervals may be anywhere from 2-7 days depending on:
    • Operation
    • Temperature
    • Dust levels
  • Over greasing could cause an oil leak from plugging the drain back holes in the labyrinth collar

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