ROD AS 3519939 - Caterpillar

General Information
When the words "use again" are in the description, the specification given can be used to determine if a part can be used again. If the part is equal to or within the specification given, use the part again.When the word "permissible" is in the description, the specification given is the "maximum or minimum" tolerance permitted before adjustment, repair and/or new parts are needed.A comparison can be made between the measurements of a worn part and the specifications of a new part to find the amount of wear. A part that is worn can be safe to use if an estimate of the remainder of its service life is good. If a short service life is expected, replace the part.
Water System Schematic
(1) Return valves (2) Front spray bar. (3) Front pump and motor group. (4) High pressure shut down switch. (5) Electric motor. (6) Water pump. (7) Front filter. (8) Front shut off valve. (9) Tank drain. (10) Drain. (11) Rear spray bar. (12) Rear tank. (13) Rear tank drain. (14) Rear shut off valve. (15) Rear filter. (16) Rear pump and motor group. (17) Tie line (connects front and rear water systems). (18) Tie line valve. (19) Tie line drain valve. (20) Front tank.The water spray system is used to keep the front and rear drums wet. If the drums are kept continuously wet, it helps to prevent hot asphalt from sticking to the drum surfaces during compaction.The drum water system consists of two identical, but separate systems, one at each end of the machine. The front system uses an electric motor (5) and pump (6) to provide water flow. The motor is turned on by a switch on the operators console. This switch has three positions: OFF; CONTINUOUS SPRAY; or INTERMITTENT SPRAY. The INTERMITTENT SPRAY switch position uses a timed cycle to reduce water consumption. The INTERMITTENT SPRAY cycle is, ON 15 seconds and OFF 15 seconds. High pressure shut off switch (4) shuts off motor (5) when the system pressure reaches 290 kPa (42 psi) and then turns it back on when the pressure drops down to 200 kPa (29 psi).Return valves (1) controls the amount of water which is recirculated or sprayed on the drum. When valves (1) are fully open, all water recirculates. When valves (1) are fully closed no water recirculates and all water flow is forced through the spray nozzles on bars (2) and (11). The normal operating position for valve (3) is midway between fully open and fully closed.Valves (9), (10), (13) and (19) are drain valves. These valves are used to drain the water out of the system.Water Tank
Water Tank For Front Drum
(20) Front water tank. (21) Water level gauge.Water tank (20) is mounted at the front of the machine. The fill opening contains a screen strainer to prevent debris from entering the system. The rear tank is the same and is mounted at opposite end of the machine.Water System Filter
Water System
(7) Front filter. (15) Rear filter.Filter (7)