1) How do you tell the difference between a "hollow” auger and a "solid” auger?
2) What kind of material can the machine extrude?
3) How do I tell the difference between the various models?
4) Does a bigger auger mean more production "speed"?
5) Why is the machine going so slow?
6) Can the machine do curb & gutter?
7) Can I throttle the machine back to slow it down?
8) How do I tell if the concrete mix is too wet, dry, stiff, etc...?
9) What will happen with the curber if there is too much backpressure?
10) How do I tell when the auger is worn out?
11) How do I tell when the compaction tube is worn?
12) What can I use to keep the auger from freezing on the shaft?
13) How tall a pin can the curber extrude over?
14) Can the machine extrude on either side?
15) Are auger(s) sizes interchangeable
16) Can you reverse the augers or inter-mix them?
17) How big of aggregate can pass through the machine?
18) How steep of a grade can the machine extrude on?
19) Why do I keep breaking shear bolts?
20 How do I tell when the centrifugal clutch is worn out?
21) Can different auger assemblies be used on the machine?
22) How do I guide the machine?
23) What rpm should the auger shaft be spinning?
24) What rpm should the motor be running?
25) How can I speed the machine up?
26) What kind of radius will the machine turn?
27) What can I put on the auger shaft to make the auger come off easier, after the job is completed?

1) How do you tell the difference between a "hollow” auger and a "solid” auger?
A hollow auger rides on a hollow shaft that will accept rebar through the center of shaft. The auger shaft for a solid auger is a solid piece of steel.(Back to top)

2) What kind of material can the machine extrude?
Asphalt or concrete can be extruded with any of our models.(Back to top)

3) How do I tell the difference between the various models?
The 550 is a recoil start, the 650 is electric start, the 655 is an offset electric start machine, and the 850 has an 18hp or Honda electric start engine.(Back to top)

4) Does a bigger auger mean more production "speed"?
No, an oversized auger results in excess backpressure which causes premature auger wear and will lift the curbform off the ground. (Back to top)

5) Why is the machine going so slow?
The auger is worn out, engine RPM is not at proper setting, the clutch is worn out, or the size & combination of auger & form are wrong. Additionally, an undersized auger will result in the machine moving slowly.(Back to top)

6) Can the machine do curb & gutter?
Yes as long as the area is within the recommended curbform area (refer to catalog or manual). However, the machine does not have self-leveling so the curb will only be as level as the surface the machine is operating on.(Back to top)

7) Can I throttle the machine back to slow it down?
No, engine must run at 2800-3000 rpm to prevent premature wear and damage to the centrifugal clutch.(Back to top)

8) How do I tell if the concrete mix is too wet, dry, stiff, etc...?
A mix that is too wet will fall, a mix that is too dry will flake apart (crumble).(Back to top)

9) What will happen with the curber if there is too much backpressure?
The augers, forms, compaction tubes and screw housings will wear out prematurely.(Back to top)

10) How do I tell when the auger is worn out?
When both ends of the flighting wear down, decreased production speed will be noticed. Eventually the machine will not move at all.(Back to top)

11) How do I tell when the compaction tube is worn?
The compaction tube should be replaced when decreased production speed is noticed. Miller recommends replacing when worn to 50%.(Back to top)

12) What can I use to keep the auger from freezing on the shaft?
After each use, remove and clean augers, clean shaft, apply grease and reassemble.(Back to top)

13) How tall a pin can the curber extrude over?
3” or less is acceptable. There must be at least 5” between top of pin and top of curb.(Back to top)

14) Can the machine extrude on either side?
Yes except for the MC655. The auger assembly can be installed on either side of the machine. Refer to the manual for instructions on changing sides.(Back to top)

15) Are auger(s) sizes interchangeable
The auger must be used in the same size housing, i.e. a 6” requires a 6” housing.(Back to top)

16) Can you reverse the augers or inter-mix them?
The two-piece cast augers should rotated as they are designed to provide a total of four wear ends. One-piece steel augers should be reversed to optimize auger life.(Back to top)

17) How big of aggregate can pass through the machine?
A maximum of 3/4" aggregate can pass through our Curbilder.(Back to top)

18) How steep of a grade can the machine extrude on?
The Curbilder will extrude on a grade of 8.5 degrees (15%) with the ideal
95% compacted surface. Ability to climb grade increases with size of mold.(Back to top)

19) Why do I keep breaking shear bolts?
The machine is producing too much backpressure or the aggregate is larger than _”. Backpressure results from the wrong mix or an improperly sized auger/form combination.(Back to top)

20 How do I tell when the centrifugal clutch is worn out?
With the engine at 3000 rpm, the auger will not have enough force to push out material. The auger will slow down without slowing down the engine.(Back to top)

21) Can different auger assemblies be used on the machine?
Yes, the MC-550, 650 and 850 will accept 5”, 6”and 8” auger assemblies. The 10” auger assembly can only be used on the MC-850. The MC-655 (under guard-rail) is available only with a 6” auger assembly especially made for the MC-655.
To change from one auger size to another, simply unbolt and remove the assembly (4 bolts & chain) and reinstall the desired assembly.(Back to top)

22) How do I guide the machine?
Follow reference line with pointer located at the front of machine. Radius requires reference to be at the back of the machine.(Back to top)

23) What rpm should the auger shaft be spinning?
The auger shaft should spin at 125 rpm (do not exceed).(Back to top)

24) What rpm should the motor be running?
Engine should be set at 2800-3000 rpm.(Back to top)

25) How can I speed the machine up?
Extrusion speeds are determined by auger size to curb size ratio.(Back to top)

26) What kind of radius will the machine turn?
Our Curbilder will turn a 6’ radius with a regular form, 3’ if form is cut off to length equal to rear axle of machine.(Back to top)

27) What can I put on the auger shaft to make the auger come off easier, after the job is completed?
Remove and clean auger shaft after each use. Coat auger shaft with grease and replace. (Back to top)