Volvo Penta TAD1630G Workshop Manual page 82

Lubrication system
(Notice.The engine outline shows a TAD-engine. The lu-
brication system is the same for both TAD and T(I)(W)D
engines.
The oil pump forces the oil through the oil cooler to the
two full-flow filters. From these filters the oil is led to the
engine block where it is distributed through ducts and
pipes to the lubricating points of the engine. On the oil
pump itself is a safety valve. This opens when pressure in
the system becomes too high, allowing the oil to reach the
suction side of the pump via a duct in the pump housing.
The reducer valve regulates the oil pressure. A bypass
valve opens when the counter pressure in the oil cooler
becomes too high, which occurs during cold starts, and
leads the oil past the oil cooler directly out into the system.
80
1. Safety valve
2. Bypass valve for oil cooler
3. By-pass valve for oil filter
4. Reduction valve
5. Piston cooling valve
Group 22