Volvo Penta d2-75 or d2-55 raw water pump help

[Pau Amma]

Hi
Does anyone know how to strip the gear off the back of the pump so i can strip it down and replace the seals? Volvo penta d2-75 - same as d2-55 There is no clip behind the impeller wear plate.
Any assistance gratefully received!

 

[VicS]

Hi
Does anyone know how to strip the gear off the back of the pump so i can strip it down and replace the seals? Volvo penta d2-75 - same as d2-55 There is no clip behind the impeller wear plate.
Any assistance gratefully received!

Same as a very recent question about a D2-40

Undo the nut, recover the washer and pull the gear off with a suitable puller .

When refitting tap the gear onto the taper and the then tighten the nut firmly. It relies on the taper alone to transmit the drive.

Before you ask I do not know the torque for the retaining nut but it might be in the workshop manual
https://www.manualslib.com/manual/1025286/Volvo-Penta-D2-55.html?page=1#manual

If it is a Nyloc nut a new one might be advisable

 

[Pau Amma]

Many thanks. I'll get a puller and keep going...

 

[coopec]

VicS

I can't find anything in the manuals (or articles) covering servicing of any water pump with a gear on a tapered shaft in regards to torque settings.

This article is the nearest I can find

Quick Update on Torquing Prop Nutsi

"Install the small, half-height jam nut first—against the hub. Tighten it up as hard as you comfortably can by hand with a standard wrench. Then, screw on the full-size nut and tighten that down independently—again, as hard as you comfortably can, by hand with a standard-size wrench.”

That’s it. If the wrench you use is the standard size for the nut you are tightening, this works fine.
https://www.followingseas.media/blog/2017/2/24/quick-update-on-prop-nuts

 

[Pau Amma]

Thank you for that. I've tightened it back up and will refit the pump tomorrow. Makes me chuckle to think I read a post on here about another older volvo water pump and the owner said it's a 25 min job to replace the seals. Progress has led to the later engine being a lot harder to work on. As to be expected.