Wacker 4-Stroke Rammer BS504AS REV 101 (2019) Clutch Drum Replacement

Firmly grip the base of the spark plug wire's connector and pull it away from the spark plug to disconnect it.

Use a 1-1/16 inch socket to break loose the oil sight gauge near the bottom of the device.

Lay the device down horizontally with the oil sight gauge facing down.

Position a shallow oil drain pan underneath the sight gauge.

Remove the oil sight gauge.

Let the oil drain until drips are infrequent.

Replace and retighten the oil sight gauge.

Flip the device onto the work surface such that the motor and handles face up.

Place two separate blocks of wood underneath the seam between the leg assembly and crankcase.

Use an 8 mm hex key socket to remove the four bolts securing the leg's guiding cylinder to the crankcase.

Pull the leg assembly away from the rest of the device.

Continue to separate the two halves by compressing the bellows until the nylon plug covering the piston pin is visible.

Use an appropriately-sized punch and a ball-peen hammer to tap the pin out of its hole on the guide piston until it is no longer securing the connecting rod.

Remove the leg assembly from the crankcase.

Use a punch and hammer to tap the pin out of the guide piston.

Use wood blocks to support the device on the work surface, motor facing up.

Use a 6 mm hex socket to remove the engine guard bolt securing the cable guide.

Pull the cable guide away from the engine guard.

Use a 6 mm hex socket to remove the three remaining bolts securing the engine guard: two on the outer edge and one near the crankcase.

Remove the engine guard.

Use a 13 mm wrench to remove the four nuts securing the motor to the crankcase, two on each side.

Use a 10 mm socket to remove the bolt securing the muffler shroud.

Lower the muffler shroud away from the motor, down onto the crankcase.

Tilt the device down onto its side, supporting both the crankcase and motor with blocks of wood.

Hold the crankcase steady and pull the motor directly away from it.

Use an 8 mm hex socket to remove the four bolts securing the crankcase cover.

Insert a flathead screwdriver into one of the side gaps between the crankcase cover and the crankcase.

Twist the screwdriver to begin to pull the crankcase cover away from the crankcase.

Repeat for the opposite side gap, and repeat until the crankcase cover comes loose from the crankcase.

Use your fingers to pull the crankcase cover off of the crankcase.

Feed the connecting rod around the clutch drum shaft and out through the crankcase cover hole.

Use a pair of snap ring pliers to remove the snap ring securing the clutch drum to the crankcase bearing assembly.

Use a rubber mallet to tap the end of the clutch drum shaft through its hole on the top of the crankcase until it becomes loose enough to be moved by hand.

Push the clutch drum shaft with your fingers until it can be gripped from the top of the crankcase.

Remove the clutch drum.