Introduction

Location of Components
(1) Front tire scrapers. (2) Front spray bar. (3) Water valves and handles. (4) Water tank. (5) Rear spray bar. (6) Rear tire scrapers.

The tire wetting and scraper system provides a flow of water over the front and rear tires during operation. This water flow is necessary to prevent the tires from picking up asphalt while compacting.

The tire wetting system on a standard machine is gravity-operated. Water for the system is stored in tank (4). Water from tank (4) flows through a hose to two water valves (3). When the valves are turned on, water flows through hoses to front spray bar (2) and rear spray bar (5). Water flows through holes in the spray bars, onto the tires.

Front tire scrapers (1) and rear tire scrapers (6) help spread the water flow over the entire width of the tires. As the machine rolls over asphalt, tire scrapers (1) and (6) scrape against the tires. This removes any material that may begin to collect on the tires.

Water Tank

Water Tank Location
(1) Water fill cap. (2) Water tank.

Water tank (2) is located on the right rear side of the machine. The water tank is built into the frame of the machine. It has a capacity of 380 liters (100 U.S. gallons).

The water tank should be filled with clean water before starting a job. Add water through fill cap (1). Check the water level often. Refill the tank as necessary.

Water exits the tank through a port at the bottom of the tank. This water flows through a hose to two water valves.

Water Valves

Water Valve (Open Position)
(1) Inlet port. (2) Ball. (3) Handle. (4) Outlet port.

The two water valves control the flow of water from the water tank to the front and rear spray bars. Water from the tank enters each valve through inlet port (1).

When handle (3) is in the Closed position, ball (2) is rotated to block water flow through the valve. No water is delivered to the front or rear spray bar

When the operator turns handle (3) to the Open position, ball (2) rotates to allow water flow through the valve. Water passes through the bore in ball (2) to outlet port (4). Water exits the valve through the outlet port, and is routed to the front or rear spray bar.

Water Valve Handle Locations
(5) Rear handle. (6) Front handle.

The handles for the two water valves are located to the right of the operator's seat, as shown above. Rear handle (5) controls water flow to the rear spray bar. Front handle (6) controls water flow to the front spray bar.

The two handles are shown above in the closed position. The operator opens the water valves by turning handles (5) and (6) counterclockwise, one-quarter turn.

Spray Bars

Spray Bar
(1) Pivot. (2) Drilled holes. (3) Inlet. (4) Pivot.

The front spray bar and the rear spray bar are mounted over the tires of the machine. The spray bars are secured to the machine by pivots (1) and (4).

Each spray bar has four drilled holes (2) for each tire. The front spray bar has 20 drilled holes, because there are five front tires. The rear spray bar on the PS-130 and PS-180 has 16 drilled holes, because these machines have four rear tires. The rear spray bar on the PS-110 has 24 drilled holes, because this machine has six rear tires.

The PS-110 uses the same rear spray bar as the PS-130 and PS-180, but with an extension added to each end for the extra tires.

Water from the water valves enters the spray bars through inlet (3). Water flows through the spray bar to drilled holes (2). Water exits the spray bar through the drilled holes and flows onto the tires.

Tire Scrapers

Tire Scraper Assembly (in Travel Position)
(1) Lever. (2) Spring. (3) Scraper arm. (4) Spray bar. (5) Standard scraper blade or optional coco mat.

The front and rear tire scrapers are used to prevent asphalt from building up on the tires during operation. Clean tires result in a smoother finish on the compacted surface. Each tire scraper assembly contains one spring (2), one scraper arm (3), and one blade (5) for each tire on the front or rear of the machine.

The tire scrapers may be set in two positions: travel position and operating position.

In the operating position, spring (2) presses scraper arm (3) down toward the tire. Scraper blade (5) scrapes against the tire, removing any material which would otherwise accumulate on the tire.

Standard scraper blades (5) are made of hard nylon. These may be replaced with optional coco mats, if desired. The coco mats absorb water, helping to keep the tires wet. The coco mats may allow the tire wetting system to operate with the spray valves only partially opened. This would allow the machine to operate longer between water refills.

Move the tire scrapers into the travel position by lifting up spray bar (4). This raises scraper arms (3) away from the tires. Swing two levers (1) into position, as illustrated above. Levers (1) hold scraper blades (5) and spray bar (4) in the travel position.