Introduction

This guide shows how to remove and replace the flex coupler assembly on the Toro Log Splitter 22618HD 2019 / LS-922.

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    • Before you begin, ensure that the engine is powered down and cool to the touch.

    • Grab the plastic housing at the end of the spark plug wire and pull firmly to disconnect it.

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    • Flip the red engine ON/OFF switch to the OFF position.

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    • Flip the fuel valve lever to the OFF position.

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    • Residual hydraulic fluid will be trapped in the hoses connected to the pump, and may drip during the following procedure.

    • Place a bucket underneath the device, below the pump to catch any hydraulic fluid drips.

    • Have rags handy to stop drips and clean up affected areas.

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    • The hydraulic fluid tank is near the back of the device, so raising the front will help keep less fluid from spilling.

    • Turn the trailer jack handle clockwise to raise the front of the device as far up as it will go.

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    • Use a large flathead screwdriver to loosen the hose clamp.

    • During reassembly, replace this hose clamp.

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    • The input hose is directly connected to the hydraulic fluid tank. Keep the hose elevated, otherwise the tank will lose hydraulic fluid.

    • Slide the hose clamp away from the pump and onto the hose.

    • Twist and pull the hose away from the pump to remove it.

    • Hydraulic fluid may spill out of the pump.

    • Ensure the hose is kept elevated to avoid spills.

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    • Use zip ties, a bungie cord, rope, or something similar to tie the hose into an elevated position to avoid spills.

    • Plug the open end of the hose with a clean shop towel.

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    • Use two adjustable wrenches to loosen the nut holding the input hose to the fitting on the right side of the pump.

    • Using one adjustable wrench to hold the nut closest to the pump steady, use the second adjustable wrench to loosen the nut on the hose.

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    • Remove the input hose from the right side fitting.

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    • Use an adjustable wrench to remove the fitting on the right side of the pump.

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    • Use a pick tool to remove the O-ring from the input hose pump fitting, on the side that connects to the pump.

    • This O-ring is part number 237-79.

    • The O-ring between the L-fitting and the hose is part number 237-58. Only replace this O-ring if it is visibly damaged.

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    • Use a 1/2 inch wrench to remove the four bolts securing the pump to the flex coupler housing.

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    • Remove the pump.

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    • Use a 2.5 mm hex key to loosen the pump-side flex coupler's set screw until the flex coupler moves freely on the shaft.

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    • Pull the pump-side flex coupler away from the pump input shaft to remove it.

    • Keep track of the pump shaft key. Transfer it to the replacement pump only if the new part does not come with a new key.

    • Only the pump remains.

    fluid is dripping from the bottom 2 bolts. I took the pump head off hoping to find an o-ring. what could cause the fluid to drip

    RANDY -

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    • Use a 2.5 mm hex key to remove the motor-side flex coupler's set screw.

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    • Reaching underneath the device, through the flex coupler housing access cutout, slide the motor-side flex coupler off of the shaft.

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    • Remove the motor-side flex coupler.

Conclusion

To reassemble your device, follow these instructions in reverse order.

Carsten Frauenheim

Member since: 10/03/20

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