Echo Chain Saw CS590 2019 Oil System Replacement

Make sure you have the ignition switch turned off before starting your repair.

Use your fingers to loosen the air filter cover knob.

Remove the air filter cover.

Use your fingers to pull up and disconnect the spark plug boot.

Remove the air filter

Use a T25 Torx screwdriver to remove the five screws securing the front handle to the bottom and right side of the device:

Four 24 mm-long screws

One 25 mm-long screw

Pull the handle toward the rear of the device to remove it.

Use a 13 mm wrench to remove the two nuts securing the sprocket guard.

Remove the sprocket guard.

Push the guide bar towards the back of the device to create slack in the saw chain.

Pull the guide bar away from the device to separate the saw chain from the clutch drum.

Remove the guide bar.

Use a T25 Torx screwdriver to remove the two 20 mm screws securing the front hand guard.

Pull the front hand guard toward the rear of the device to remove it.

Use a T25 Torx screwdriver to remove the three 20 mm screws securing the engine cover.

Pull the engine cover straight off the device to remove it.

Use your fingers to loosen and remove the oil cap.

Use a flathead screwdriver, or your fingers, to remove the oil filter from its recess in the fuel assembly.

Pull on the oil filter to separate it from the fuel pipe.

Insert the edge of a screwdriver between the inner guide plate and the chassis.

Pry up with the screwdriver to initially separate the plate.

Slide the plate out of its two bolts to remove it.

Use a T25 Torx screwdriver to remove the four screws securing the brake cover:

Three 20 mm-long screws

One 16 mm-long screw

Pull the brake cover straight off the clutch drum to remove it.

Use E-ring pliers, or a flathead screwdriver, to remove the E-ring on the clutch drum.

Use your fingers to pull the washer straight out of its housing to remove it.

Pull the clutch drum straight out of its recess to remove it.

Use a spark plug socket to loosen and remove the spark plug.

Feed a piston stopping cord or rope through the cylinder head into the combustion chamber until the crankshaft can no longer rotate.

Use a clutch removal tool and a wrench to loosen the clutch assembly.

Use your fingers to loosen the clutch assembly and remove it from the crankshaft.

Use your fingers to pull the clutch plate straight off of the crankshaft and remove it.

Use pliers, or your fingers, to pull the collar off of the crankshaft and remove it.

Use pliers to pull the worm gear straight out its housing to remove it.

Use your fingers, or a flathead screwdriver, to disconnect the top oil pipe from the oiler assembly.

Use your fingers, or a flathead screwdriver, to disconnect the right oil pipe from the oiler assembly.

Use a T25 Torx screwdriver to remove the two 15 mm screws securing the oiler assembly.

Use pliers, or your fingers, to pull the oiler assembly straight out its housing to remove it.

Use pliers, or your fingers, to pull the washer off of the crankshaft and remove it.

Use snap ring pliers to remove the retaining ring on the crankshaft.

Use a flathead screwdriver to pry the oil outlet port out its recess in the chassis.

Remove the oil outlet port.

Thread the oil pipe through the oil cap recess to remove it.

Use a pick tool to remove the grommet next to the clutch assembly's recess.