Volvo Penta TD520GE Workshop Manual page 71

Group 21
137. Fit a new O-ring to the return pipe. Oil lightly.
138. Fit the oil return pipe with a new gasket.
139. Tighten the screws to ........................ 21 + 2 Nm
(15.5 +1.5 lbf ft).
140. Fit the clamping yoke.
Checks and adjustments
81