Tamping

When inlaying pavement markings in new asphalt concrete surfaces, tamp the markings during the final compaction (finishing roller) of the mat. After application of markings on existing surfaces, tamp the tape thoroughly with the 3M™ Roller Tamper Cart (RTC-2) with a minimum 200 lb.

(90 kg) load, or slowly (2-3 mph) drive over the tape three times with a vehicle tire. The vehicle must be equipped with a pointing device to aid in keeping the vehicle on the tape, making three passes forward over the tape. Use a vehicle tire on long line markings only. Do not attempt to tamp intersection markings with a vehicle tire.

Tamping is most important!

When using the RTC-2 Roller Tamper Cart with

200 lbs. (90 kg.) of weight:

•Do not twist or turn the tamping device on the tape.

•Make three passes back and forth over each part of the tape.

•When tamping symbols, start in the center and work to the outside edges.

•Make sure all edges are firmly adhered.

•Open road to traffic as soon as tamping is complete.

Maintenance

Keep All Fasteners Tight

Lubrication: All the pivot points and sliding areas should be kept lubricated with light oil penetrant such as 3M™ Five-Way Penetrant or similar penetrants such as WD-40.

Cleaning: The rubber application roller wheels and cutting mechanism must be kept clean. 3M™ Citrus Base Industrial Cleaner or any natural citrus based cleaner may be used on the wheels and knives. Solvents may be used occasionally for difficult cleaning problems. A spray bottle of cleaner is useful to prevent asphalt buildup on the wheels and adhesive buildup on the knives during opera- tion.

Caution: Do not use solvents or petroleum products on the silicone application roller when working on new, hot asphalt surfaces. A paint scraper or putty knife should be used to clean the asphalt buildup from the scraper and cutter mounting bar. To prevent asphalt buildup around the roller, additional clearance can be provided by loosening the scraper mounting screws and sliding the scraper back. Tighten the screws. Second, remove the cutter mounting bar and grind 1/8 inch (3.175 mm) off the bottom. Replace the bar.

 

 

Each

Every 50

Every 100

 

 

Use

Hour

Hours

Engine Oil

Check Level

X

 

X

 

Change*

 

 

 

Air Cleaner

Check

X

X

 

 

Clean*

 

 

 

Spark Plug

Clean and

 

 

X

 

Readjust

 

 

 

 

 

 

 

 

*Service more frequently when used in dusty areas.

Adjustments

The SCRAPER BAR, which is readjusted by the manufacturer to prevent excess materials from accumulating on the application roller, should be periodically checked for wear and rotated if neces- sary. The bar should contact the rubber roller across the full length of the roller.

The KNIVES are readjusted by the manufacturer to slide across each other with a minimum of friction in a scissors action. Adjustment is needed when foil construction tapes are not cleanly cut. Either the STATIONARY KNIFE or the SLIDING KNIFE may be adjusted (See Figure 5). To adjust the stationary knife, loosen the mounting screws slightly. Turn the set screws to bring the cutting edge down, and retighten the mounting screws. The same procedure is followed to adjust the sliding knife. Each knife has two cutting edges. The knives may be removed and new cutting edges exposed. The knives may be sharpened after the cutting edges are dull.

Figure 5

4