1999 Volvo Penta "WT" Models Workshop Manual, Page 293Get this manual
4Pull drain hose out of bell housing if equipped
5Remove bolts and nuts retaining bellhousingDisconnect ground wires and oil cooler bracketNote oil cooler orientation6Remove bell housing7Use an offset box end wrench to remove the six nuts securing the coupler, and slide coupler off studs
8Remove old gasket from bell housing coverClean gasket surface thoroughlyInstallation]1Install coupler and attach six locknutsUse suitable adaptor and tighten nuts to 40-45 ftIbs(54-61 Nm)2Install bellhousingAttach oil cooler with same orientation as noted in previous stepTighten nuts and bolts to 32-40 ftIbs(43-54 Nm)Attach ground wires and tighten nuts to 15-20 ftIbs