John100156
Well-Known Member
So here is a picture showing the correct orientation of the valve for those that are interested....
CAT 3126 MANUAL OIL DRAIN PUMP
- Thread starter John100156
- Start date
penberth3
Well-Known Member
I would put a label on it.
rafiki_
Well-Known Member
Actually it is pretty obvious. On my Cats there were arrows moulded in.
John100156
Well-Known Member
Port engine pointer/arrow Up sucks from left gearbox hose. Right sucks from right engine hose, no arrows moulded in and Cat/Finning tried but could not advise, which was surprising...!
I worked it out of course when changing the engine oil. Its different on the Stb engine, but now I know its just a 90 degree ported plug, and not a tee, Up for engine and Right for GB...!
I worked it out of course when changing the engine oil. Its different on the Stb engine, but now I know its just a 90 degree ported plug, and not a tee, Up for engine and Right for GB...!
penberth3
Well-Known Member
The first page of this thread suggests it's anything but obvious!
John100156
Well-Known Member
Yeah its pretty obvious once you know, 90 port seems obvious/sensible but as you can rotate the pointed in four positions, without knowing, you had no idea how it was configured, hence why I posted the image, just to benefit others!
A circular disc with 90 degree lines would have made it more obvious!
Still, the hand pump did work well, as did the engines on a recent run down the coast, having previously had Volvo's in my last two boats I must say, I do like the CATs! Except for the number of anodes fitted to each engine (11) but hey-ho, all for the best....!
A circular disc with 90 degree lines would have made it more obvious!
Still, the hand pump did work well, as did the engines on a recent run down the coast, having previously had Volvo's in my last two boats I must say, I do like the CATs! Except for the number of anodes fitted to each engine (11) but hey-ho, all for the best....!
Nito
Well-Known Member
Funny this should appear now, we have Cat 3126's on our new to us boat, the previous owner had a drawing showing the positions. It's as per your helpful photo above and you are bang on with 'small pointer up is left hose and right is right hose'.
Our's are on V-drives, so the orientation is slightly different to yours but it's the same principle you described of 'up' does 'left' hose and the pointer to the 'right' does the hose to the 'right' (wherever it goes to). On ours... the gearbox is in front of the engine, so on the port side the pointer when pointing right is pointing to the gearbox. On the Starboard engine, the hose to the right is engine oil.
As per diagram below for V-Drives.
Good thread. Nice to see others with the 3126's.
Check your alternator bracket while you're next poking about in there. Ours was cracked through but still held in position thanks to the way it cracked and the lower alternator bracket thankfully still retaining it. If the lower bracket had failed or the tension bolt come loose it could have been a big old mess.
Quite surprising for such a beefy piece of steel. It is 24 years old though and perhaps poor belt tension helps lead to this. All my belts are quite loose.
The other side is showing early signs of failure at the spot welds...
I've bought new brackets (and had the original welded which is back on temporarily until the new ones arrive) and new bolts for the alternator and water pump tensioners as well as new tensioner pulley bearings for when I change all the belts imminently.
Our's are on V-drives, so the orientation is slightly different to yours but it's the same principle you described of 'up' does 'left' hose and the pointer to the 'right' does the hose to the 'right' (wherever it goes to). On ours... the gearbox is in front of the engine, so on the port side the pointer when pointing right is pointing to the gearbox. On the Starboard engine, the hose to the right is engine oil.
As per diagram below for V-Drives.
Good thread. Nice to see others with the 3126's.
Check your alternator bracket while you're next poking about in there. Ours was cracked through but still held in position thanks to the way it cracked and the lower alternator bracket thankfully still retaining it. If the lower bracket had failed or the tension bolt come loose it could have been a big old mess.
Quite surprising for such a beefy piece of steel. It is 24 years old though and perhaps poor belt tension helps lead to this. All my belts are quite loose.
The other side is showing early signs of failure at the spot welds...
I've bought new brackets (and had the original welded which is back on temporarily until the new ones arrive) and new bolts for the alternator and water pump tensioners as well as new tensioner pulley bearings for when I change all the belts imminently.
Last edited:
John100156
Well-Known Member
Interesting...
I am due to change my belts next time out, so will now inspect the alternator brackets too for fatigue, thanks for the heads-up!
I am due to change my belts next time out, so will now inspect the alternator brackets too for fatigue, thanks for the heads-up!