Servicing Crossland 522 Water Seperator on 1GM

[eebygum]

As some of you may have noticed this is first attempt at servicing my Yanmar 1GM so and far so good - oil and filters changed, impeller changed, alternator slacked off, cooling system flushed with antifreeze now I'm trying to tackle the water seperator in the fuel line.

The make on the seperator says 'Crossland 522' and it's fitted about 60 cms below the diesel tank in the rear cockpit locker of my Hunter Horizon 26 and a damn pain to get to. I literally had to climb in the locker today (I'm relatively small !) to get at the thing .........but I could not get it off, any clues ?

Does the bowl twist off or it 'feels' like there is a fly screw underneath ? or is it one of th escrews on the top ?

Once I get it off (thinking positively here) what do I need to clean - just the bowl or is there a filter ?

Any issues getting it back on and and refilling. I've figured out where the stopcock is above the seperator, presumably I just open this to refill it ?

Thanks in advance

 

[pvb]

What you've got is a standard CAV-type primary fuel filter. The "Crosland 522" bit is the disposable filter cartridge. Usually, there's a glass or alloy bowl below this - that's the water separator bit. The base is an alloy casting with a plastic thumbscrew in it; unscrewing the plastic screw allows water to be drained out. The base plate has a rod fixed to it which goes up through the filter to the top plate. The central bolt on the top plate releases the base, allowing you to change the filter.

To service it, turn off the diesel supply at the tank, put a container under the filter to catch spills, remove the central bolt (10mm socket?), let the base and the water separator bowl drop into the container. Pull the cartridge filter downwards to remove it from the top plate (sometimes they take quite a firm pull). Clean the base and the water separator carefully with kitchen paper.

Although you have a Crosland 522 filter cartridge, there are lots of possible alternative makes. The OE cartridge is a Lucas/CAV 296, so use this to cross-reference from (Lucas parts are now branded as Delphi). New filter cartridges are usually supplied complete with 4 rubber sealing rings - the largest one goes in a groove on the underside of the top plate; the next size (only very slightly smaller) goes in the base plate; the next smallest (about 15mm diameter) is an O-ring which goes in a groove on a stub on the underside of the base plate; finally, there's a tiny O-ring (about 4mm diameter) which goes on the central retaining bolt. If you have a glass water separator bowl, you need another ring to go on the top of the bowl - most good chandlers will sell these separately (same size as the one which fits in the base plate).

Getting the old rubber ring out of the underside of the top plate is sometimes tricky. You can spear it with a sharp point to get hold of it. Some people use their chart-table dividers to grab it.

Re-assemble and tighten the central bolt. Loosen the bleed nut on the top plate, turn on diesel supply and let gravity fill the filter.

If the unit is so difficult to get to (why do boatbuilders do this??), and as the unit is well below your fuel tank (so that air leaks aren’t a problem), I’d be tempted to skip some of the more inaccessible rubber gasket renewals.

 

[paulrossall]

Very good/usefull. Thank you Mr pvb. NM

x

 

[eebygum]

Thanks mate for putting in such a detailed response. I owe you a mince pie

I'll give it a go after Christmas.

Cheers