emandvee44
Well-Known Member
We have just had the boat ashore for the Annual scrub, renew anodes, clean and grease propeller, anti-foul propeller, same for bow thruster (Velox Plus)
Back in the marina and the forward heads refused to pump. By that I mean the pump handle could be moved up and down very easily but no water inflow. It was possible to evacuate the bowl.
This morning, being a Sunday and not having anything better to do, I decided to investigate the problem.
I do not profess to be an expert on Jabsco systems, but I have many years of unpleasant experience in trouble shooting and fixing their problems, including one incident in the Middle of Biscay on our one loo yacht and with females on board who had managed to block the loo – details not appropriate.
Other incidents involved joker valve turning inside out, heads backfilling at an alarming rate, holding tank overflow (details withheld), and many other minor catastrophes. Fortunately, Jabsco toilets are simple and thus easy to maintain and fix.
First step, undo the six self tappers on the pump cover, lift and what do we find –
The guilty party, a washer of the type that grips on a shaft, was sitting under the intake flapper valve , thus preventing it from closing and allowing suction to be applied to the water inlet source.
I changed the ‘O’ ring, mainly because I had a lot of spares, greased the pump barrel liberally with Vaseline and re-assembled. Pump working fine.
After all the above waffle I come to the point – where did the washer come from? I looked at the Jabsco diagrams but it does not seem to be a part of the system. It is not pure stainless, as there is little or no\ rust on it, but so far it remains a mystery as to its origin.
M.
Back in the marina and the forward heads refused to pump. By that I mean the pump handle could be moved up and down very easily but no water inflow. It was possible to evacuate the bowl.
This morning, being a Sunday and not having anything better to do, I decided to investigate the problem.
I do not profess to be an expert on Jabsco systems, but I have many years of unpleasant experience in trouble shooting and fixing their problems, including one incident in the Middle of Biscay on our one loo yacht and with females on board who had managed to block the loo – details not appropriate.
Other incidents involved joker valve turning inside out, heads backfilling at an alarming rate, holding tank overflow (details withheld), and many other minor catastrophes. Fortunately, Jabsco toilets are simple and thus easy to maintain and fix.
First step, undo the six self tappers on the pump cover, lift and what do we find –
The guilty party, a washer of the type that grips on a shaft, was sitting under the intake flapper valve , thus preventing it from closing and allowing suction to be applied to the water inlet source.
I changed the ‘O’ ring, mainly because I had a lot of spares, greased the pump barrel liberally with Vaseline and re-assembled. Pump working fine.
After all the above waffle I come to the point – where did the washer come from? I looked at the Jabsco diagrams but it does not seem to be a part of the system. It is not pure stainless, as there is little or no\ rust on it, but so far it remains a mystery as to its origin.
M.
