Air Pump
The belt driven air pump is mounted on the front of the engine with power take-off at the crankshaft pulley. Intake air enters the pump through a centrifugal filter fan at front of pump on all models except Omni and Horizon. On Omni and Horizon, intake air enters pump through a tube at the rear of pump.
CAUTION:
On Omni and Horizon, the intake tube at rear of pump is larger in diameter than the discharge tube, If air hoses are not properly connected air pump may be damaged.
Air is delivered to the air injection manifold and check valve tube assembly by a rubber hose through the diverter valve and switching valve (except Omni and Horizon).
NOTE:
The only serviceable component of the air pump is the centrifugal fan filter. Also, a color coded label applied to the under side of the air pump is used to identify the pump.
CAUTION:
DO NOT LUBRICATE PUMP. Wipe all oil off of pump housing. Oil in the pump will cause rapid deterioration and failure.