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tdickson
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Post subject: 880 Selectamatic Repairs
 Posted: Nov 21, 2009 - 06:39 AM
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Joined: Oct 29, 2009
Wyee, New South Wales, Australia
Posts: 46
Status: Offline
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Hi
I have been gathering some spares to restore my 880 to working condition.
First job is to replace the water pump, thermostat, hoses and belt. Are there any 'tricks or traps' that I need to be aware of. Any other useful advice would also be gladly accepted.
Thanks. |
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Powerrabbit
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Post subject: RE: 880 Selectamatic Repairs
Posted: Nov 21, 2009 - 09:23 AM
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Joined: Jan 03, 2007
Devon
Posts: 3027
Status: Offline
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| There is nothing complicated to worry about doing these little jobs. You will need to remove the air cleaner and air intake hoses in order to remove the radiator and before you take the old rad hoses off slacken all the jubilee clips. Take the top rad hose off first after removing the rad foot securing bolts in the frame, be sure to take off the plate under each bolt. If the top hose is stuck on the tubes, cut it through lenghtways at the thermostat end and peel it off around the tube and then do the same to the bottom hose at the waterpump, then slide the rad forward and lift it out, you can then get at and remove the hoses from the rad better. Remember to save the spacers tubes for the rad feet that the bolts go through and the two rubber blocks each side, if the rubbers are cracked or soft then either make or get a new set as this will affect the height the rad sits and new ones will give the rad the right level of movement which protects it against vibration fatique if it were bolted down solid. Waterpump removal and re-fitment is then straight forward, undo the upper and lower jubilee clips on the bypass hose between the top of the pump and under the thermostat housing, this little hose is very often stuck fast and the best way to remove it is to remove all your pump bolts and loosen the pump off the engine and prise the hose off with a screwdriver by levering the hose down from the bottom of the head. Replacing all the hoses, make sure that all 'tubes' that the hoses go on are free from old bits of rubber and clean, smear the inside of the hoses each end with a little washing up liquid as this makes them slide on easier. Stick the waterpump gasket in place on the engine with a little smear of instant gasket stuff. Take care especially with the bypass hose re-fitting as this can be fiddely, fit it to the head first and then push the waterpump up into the bottom of it, make sure the hose is seated right and tighten the jubilee clips, you can then bolt up the pump. Remember to put your jubilee clips over the hoses before putting them on. When fitting the rad hoses, put them on the rad before you put it back on the tractor then just sit the rad in the front frame, slide on the bottom hose to the waterpump first and secure then tilt the top of the rad forward to locate and slide on the top hose to the thermostat housing. The rest is just the reverse of taking off. Then re-ajust the fan belt tension, 1/2" slack by pushing in with the thumb between dynamo and crank pulley. Run up the tractor to temperature, after putting the water in the rad of course, and inspect for any water leaks or seepink from your hose joints. In saying all this I might be preaching to the converted as it were but it's surprising how wrong it can go if you've never done it before. |
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tdickson
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Post subject: RE: 880 Selectamatic Repairs
Posted: Nov 21, 2009 - 05:18 PM
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Joined: Oct 29, 2009
Wyee, New South Wales, Australia
Posts: 46
Status: Offline
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Thanks Powerrabbit.
I especially liked... "Remember to put your jubilee clips over the hoses before putting them on". It suppose seems such obvious and simple thing but wil no doubt save me some time, effort and frustration.
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I'll be taking the opportunity to replace the thermostat at the same time. Any advice on this? |
_________________
1967 David Brown 880A / 540113
1968 David Brown 880A / 550795
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Powerrabbit
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Post subject: RE: 880 Selectamatic Repairs
Posted: Nov 21, 2009 - 07:15 PM
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Joined: Jan 03, 2007
Devon
Posts: 3027
Status: Offline
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| Again very staight forward. Just make sure to clean any old gasket residue and rust/high spots from the mating surfaces of housings and castings (this goes for the waterpump and engine mating surfaces as well of course) and clean out the groove that the sealing ring rubber sits in and the inside lip where the thermostat sits and thats about it really. Wheather it makes any difference or no I have no idea but I was told to fit the thermostat with the little loose ball 'valve' facing the front towards the radiator. If you're fitting a new themostat, look underneath to see what its opening temperature is to be sure to replace it with one of the same. |
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tdickson
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Post subject: RE: 880 Selectamatic Repairs
Posted: Nov 30, 2009 - 08:33 AM
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Joined: Oct 29, 2009
Wyee, New South Wales, Australia
Posts: 46
Status: Offline
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Cooling System Mission accomplished!!!
Many thanks to all who contributed their advice.
Water pump, rad hoses and thermostat replaced with relative ease on a hot (+30 C.) day. I took my time and still have plenty of skin on my knuckles for the next wrostle.
I did notice there was a fair bit of orangy/rusty crud in the cooling system, dry at the top, sludgy at the bottom. I flushed as much as I could out with water from the garden hose. Is there a method for giving the cooling system proper clean out?
Thanks
Thom |
_________________
1967 David Brown 880A / 540113
1968 David Brown 880A / 550795
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Powerrabbit
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Post subject: RE: 880 Selectamatic Repairs
Posted: Nov 30, 2009 - 01:20 PM
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Joined: Jan 03, 2007
Devon
Posts: 3027
Status: Offline
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| You can clean out the system further by mixing a 2lb packet of soda crystals in a gallon of boiling water. The way to do it is to run the engine up to temperature and then drain the system, then tip your dissolved soda mix with the boiling water in the radiator whith the engine running and then top up with more boiling waster until you can see that it is circulating. Screw back on the rad cap so the system pressurises, keep the tractor running, it will quite quickly return to its running temperature despite the boiling water you've put in, and give it an hours work or so to maintain temperature and then drain it all down again. You may have to flush the system with clean water a couple of times until it all runs clear again and when you're satisfied it's clean enough re-fill with clean water again and jobs done. There are proper engine cooling system flush stuff you can get but the soda crystals will do the same job. Soda crystals over here are found in most household cleaner sections of hardware shops and supermarkets and are cheap to buy. |
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john1694
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Post subject: RE: 880 Selectamatic Repairs
Posted: Nov 30, 2009 - 08:48 PM
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Joined: Jan 12, 2009
Cumbria
Posts: 675
Status: Offline
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| Soda crystals are often much better than proprietary mixes - and certainly better value-for-money. I agree totally with PR on this, but remember to refill the system with a "coolant additive" for future corrosion protection and lubrication. |
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tdickson
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Post subject: RE: 880 Selectamatic Repairs
Posted: Dec 02, 2009 - 09:47 AM
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Joined: Oct 29, 2009
Wyee, New South Wales, Australia
Posts: 46
Status: Offline
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I'm pretty sure I can get some soda crystals from the supermarket here too. I'll give it a try and see how it goes.
Many thanks.
Thom. |
_________________
1967 David Brown 880A / 540113
1968 David Brown 880A / 550795
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