Intake and Exhaust Valves/Intake and Exhaust Valves IMPORTANT: Valve assemblies must be installed in original bores for maximum valve performance. 5. Install tappets in original bores. M36270 -UN-29JAN90 M98,2015K,27 -19-08OCT85 IMPORTANT: Never reuse intake valve seal. The seal must be replaced each time the valve is removed. 6. Install intake valve seal, if equipped, with lip of seal toward tappet. M36279 -UN-29JAN90 M98,2015K,28 -19-08OCT85 CTM2 (19APR90) 15-13 16, 18, 20 & 24HP Onan Engines AllTractorManuals.com 130495 4. Install valve seats with chamfer away from driver disk. Push valve seats to bottom of cylinder block bore.
DISKS FOR VALVE SEAT INSTALLATION Engine Valve Size -UN-25JAN90 B43E, B43G, B48G Intake 1-3/16 and 1-7/16 in. B43E, B43G, B48G Exhaust 15/16 and 1-3/16 in. T260 Intake 1-1/8 and 1-1/2 in. M36883 T260 Exhaust 1 and 1-5/16 in. P218G, P220G Intake 1-7/16 in. P218G, P220G Exhaust 1-3/16 in. M98,2015K,26 -19-30JAN87 15 13