VP 1340A/VP 1550A Operationwpm_tx001087gb.fm 173.6 OperationRun the engine at full throttle and allow the plate to pull itself along atits normal speed. When operating on an incline it may be necessary toassist the plate by pushing it forward slightly. When operating downhillhold the plate back slightly, if it begins to pick up speed. Depending onthe material being compacted, three or four passes are recommendedto achieve the best compaction.While a certain amount of moisture in the soil is necessary, excessivemoisture may cause soil particles to stick together and prevent goodcompaction. If soil is extremely wet, allow it to dry somewhat beforecompacting.If soil is so dry as to create dust clouds while operating plate, somemoisture should be added to the ground material to improvecompaction. This will also reduce service to the air filter.For compacting asphalt, use a water tank to wet the asphalt and theunderside of plate. This will prevent asphalt material from sticking.Two passes are usually sufficent to ensure good compaction.When using the plate on paving stones, attach a pad to the bottom ofthe plate to prevent chipping or grinding surface of stones. A specialpolyurethane pad designed for this purpose is available as an optionalaccessory.NOTICE: DO NOT operate the plate on concrete or on extremely hard,dry, compacted surfaces. The plate will jump rather than vibrate andcould damage both the plate and the engine.