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Use this guide to replace the oil system in your Echo Chain Saw CS-590 (2019).
Although it's not necessary to remove the guide bar, it's highly recommended you do so to minimize any damage to the chain and to yourself.
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Make sure you have the ignition switch turned off before starting your repair.
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Use your fingers to loosen the air filter cover knob.
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Use your fingers to pull up and disconnect the spark plug boot.
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Remove the air filter
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Use a T25 Torx screwdriver to remove the five screws securing the front handle to the bottom and right side of the device:
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Four 24 mm-long screws
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One 25 mm-long screw
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Pull the handle toward the rear of the device to remove it.
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Use a 13 mm wrench to remove the two nuts securing the sprocket guard.
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Push the guide bar towards the back of the device to create slack in the saw chain.
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Pull the guide bar away from the device to separate the saw chain from the clutch drum.
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Remove the guide bar.
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Use a T25 Torx screwdriver to remove the two 20 mm screws securing the front hand guard.
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Pull the front hand guard toward the rear of the device to remove it.
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Use a T25 Torx screwdriver to remove the three 20 mm screws securing the engine cover.
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Pull the engine cover straight off the device to remove it.
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Use your fingers to loosen and remove the oil cap.
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Use a flathead screwdriver, or your fingers, to remove the oil filter from its recess in the fuel assembly.
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Pull on the oil filter to separate it from the fuel pipe.
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Insert the edge of a screwdriver between the inner guide plate and the chassis.
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Pry up with the screwdriver to initially separate the plate.
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Slide the plate out of its two bolts to remove it.
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Use a T25 Torx screwdriver to remove the four screws securing the brake cover:
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Three 20 mm-long screws
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One 16 mm-long screw
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Pull the brake cover straight off the clutch drum to remove it.
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Use E-ring pliers, or a flathead screwdriver, to remove the E-ring on the clutch drum.
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Use your fingers to pull the washer straight out of its housing to remove it.
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Pull the clutch drum straight out of its recess to remove it.
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Use a spark plug socket to loosen and remove the spark plug.
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Feed a piston stopping cord or rope through the cylinder head into the combustion chamber until the crankshaft can no longer rotate.
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Use a clutch removal tool and a wrench to loosen the clutch assembly.
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Use your fingers to loosen the clutch assembly and remove it from the crankshaft.
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Use your fingers to pull the clutch plate straight off of the crankshaft and remove it.
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Use pliers, or your fingers, to pull the collar off of the crankshaft and remove it.
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Use pliers to pull the worm gear straight out its housing to remove it.
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Use your fingers, or a flathead screwdriver, to disconnect the top oil pipe from the oiler assembly.
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Use your fingers, or a flathead screwdriver, to disconnect the right oil pipe from the oiler assembly.
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Use a T25 Torx screwdriver to remove the two 15 mm screws securing the oiler assembly.
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Use pliers, or your fingers, to pull the oiler assembly straight out its housing to remove it.
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Use pliers, or your fingers, to pull the washer off of the crankshaft and remove it.
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Use a flathead screwdriver to pry the oil outlet port out its recess in the chassis.
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Remove the oil outlet port.
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Thread the oil pipe through the oil cap recess to remove it.
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Use a pick tool to remove the grommet next to the clutch assembly's recess.
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To reassemble your device, follow these instructions in reverse order.
To reassemble your device, follow these instructions in reverse order.
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***Step 36*** Remove the retaining ring . Is there a reason to remove, unless you're doing a complete teardown?
Hi there.
You're right! That was a left over from a different procedure, and I'll remove the step. Thank you!
Is there a torque value for the clutch? If so, what is it?
