312D or 313D pump pressure hunting or failing to cut back under load? A worn 282-9155 pump regulator loses servo spool accuracy, causing the pump to over-deliver or under-deliver relative to the load demand - stalling the engine or leaving the 312D operating at partial hydraulic capacity. RITO supplies this Handok-grade regulator assembly to restore precise swashplate control on your Cat 312D or 313D.
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