I bought the Kumar D600 WP this summer. The bearing seized up in middle of cutting grass. Had the new WP in two days.
The casting looked a little rougher was than the original Kubota WP but heck bearings and seal should be OK. The Kumar pump has about 60 hours on it without any problems.
Last night press apart the original WP and found the pump seized because the weep hole was plugged and coolant got into the bearing.
Need to now source a new bearing and WP seal.
Bob G.
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