FRISTAM Positive Displacement Pump FDS-5

Ensure the machine is turned off and cooled down

Gather necessary tools and materials for oil change

Check the oil level in the sight glass on the rear of the gearbox housing

Is the oil level in the center of the sight glass?

Drain the old oil from the gearbox

Refer to the Technical Information section for oil capacity and fill with ISO 100 synthetic oil

Loosen the four mechanical seal retainer bolts

Remove the mechanical seal retainers

Remove the rotating units from the shafts

Remove the stationary units from the housing

Lubricate the outer O-ring of the stationary seal

Line up the notch to the outside of the housing

Loosen the casing/housing bolts

Remove the casing from the housing using a rubber mallet if necessary

Inspect the casing/housing gasket for damage

Ensure all cover bolts and washers are removed

Remove the cover from the casing using a rubber mallet if necessary

Inspect the cover gasket for damage

Place a brass or aluminum block between the screws to block rotation

Remove the screw nut from the drive screw

Move the block to the underside, near the housing, to torque the opposite screw

Remove the screw nut from the idle screw

Inspect the screw nut gaskets for damage