Hino EH-700 raw water pump relocation bracket?

[Guest]

So, we know checking or changing the impellers on the EH-700's raw water pumps is a pain...the engine mounts are in front of the pump backplate you take off to get to the impeller, so you have to loosen pump bolts, take the belt off the pump, or just take the whole pump off. Just to get the impeller out. LOL.

There's got to be a way to make this easier to maintain...has anyone thought about fabricating a bracket that would raise or relocate the pump a few inches away from the engine mount so that you CAN get the backplate off unobstructed? I haven't looked closely with this idea in mind yet (but will this weekend)....just wanted to toss out the idea, seems like something that would be do-able. Any thoughts?

Cheers,

Dave

[Pcpete]

Dave, I looked a my mount and realized the challenge was going to be in the tensioning bolt. Putting a plate under the pump is easy, but that makes the the tensioning screw out of alignment and that block is welded to the motor mount. A guy could bolt a block to the port side of the vertical block that is threaded for the tensioning screw. Easy on the starboard engine, move the batteries for the port. I would want it to replicate the allowable misalignment the same as the current setup, just move it up about 3/4 to 1". I think I'd mill a quarter inch or so step into the mating surface to provide the additional block to automatically set the height then the only thing to chase is fore and aft. Too many years making tools me thinks.

[Guest]

"Pcpete" post=809467 wrote:
...Too many years making tools me thinks.

LOL. OK, I'm going to climb in there and give this a look this weekend...I'll try to visualize what you've said. Thanks!

Dave

[brad4550]

Dave/Pete

Let us EH700 Owners know what u come up with,would be nice if it was made to bolt on?? I would buy it,getting to old and fat ,knees don't bend like they use to,that Port side takes to long thanks guys....Brad

[capt._ron]

My answer to this pia maintenance problem was to buy a spare pump. When it's time to change a impeller remove the existing pump install the spare I just put a new impeller in.

[Pcpete]

Alright you guys. It's cruising season so I'm not going to get to it for a while, but I have an idea that might work. I just need to play with cardboard then a couple of my machines in the shop. Shimming the pump up is easy, it's the tensioning assembly that I need to play with. Then, of course, there are some things I have done to the boat that have yet to be inspected by the Admiral and her revisions are going to come first. She should be happy with the repitch of the ladder to the flybridge and rebuilding of the steps from the salon to the galley with wider treads and a compartment for the trash bin.

[Guest]

Yeah, that belt tensioning block does throw a wrench into the works. I don't have any good ideas at the moment, so I'm quite interested in what you come up with. (If you manage to design one that solves the problem without creating any new problems, I'll definitely be one of your customers!)

Cheers,

Dave

[Guest]

I asked Dave Dooling at Greenwater Marine (the maker of the stainless steel exhaust risers for the EH-700's) if he had ever thought of making such a bracket for the raw water pump...his reply was "I wouldn't know where to start". I'm getting the boat ready for a week-long trip starting on July 1, so I haven't had a good opportunity to look closely at this and take any measurements, but the idea is still sitting there in my head waiting for me to take that closer look.

Dave

[Cool_Beans]

. . .it looks simple to me, I'm going to prototype some over the winter and report back :P

[Swimmster]

My thought on this, is to flip the impeller, and relocate the pump to the other side of the engine, only reversed.. So that the backing plate is facing out and easy access... I know this is old, but I'll be playing with this idea as well.. If it works out, will get geared up with someone here with resources for production. Imagine having both raw water pumps turned around with super easy back plate access.. And both pumps being inboard.... Yep. Later today, going to have to get busy with CAD...

[Jim_Gandee]

Swimmster, I'd sure appreciate it if you can pull that off! I usually lay across the top of the port engine and reach down with one arm/hand to remove the pump. I change the impeller on the work bench then go through the contortions again to reinstall. What can I do to help you?

[brad4550]

To All
I would be very interested in your idea / bracket count me in....getting to old and engine room haha crawl space shrinks every time I get in their.My process is to unbolt assembly and pull it over to the center and change Impeller,takes me hours and copious amounts of beer to complete....So please come up with a new bracelet!!....Thanks....Brad