You can also tighten the front band to hold the drum to keep the guts in place, check hardware stores for as long as you can find 3/8-16 bolts (8” length shown) some washers, and use two of the biggest sockets you have (1-1/4” impact shown) and assemble as shown. Thread into the threaded pump holes (9 and 3) and violà! Instant slide hammers. One might work alternating but with two it’s as cinch. Helps if you have big sockets already on hand. Rapid hammering and the cover will pop out.
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