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    • ZF HSW 800 IV Low Pump Pressure

      This topic has 4 replies, has 2 voices, and was last updated byDavid Tenhundfeld 3 years ago

      June 16, 2020 at 7:13 am I have 2 HSW800 IV’s in a 410 Sundancer, mated to 350 hp 3126 CATs right at about 1000 hrs. These had the old style 12V proportional solenoid electric shift control valves installed. For diagnostic reasons, I recently added pump pressure and oil temp sensors to these units. Pressure readings generally tracked the pressure/rpm curve listed in the manual, and were very close to each other side to side, except that they topped out about …

      Started by: David Tenhundfeld in: Marine Transmissions

      4 Replies
      June 17, 2020 at 12:31 pm Tony Athens wrote: Gear tooth in the filter? Explode would be my call. Waste no money on the gear and save up for a new 85 series Thats my thinking as well. We shall see. Money is budgeted. Probably do over the winter (if it makes it that far)

      Last Post by: David Tenhundfeld posted: 3 years ago

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