ducky698 Posted October 13, 2009 Share Posted October 13, 2009 Hi, am slowly getting this 866 sorted. have just pulled water pump off to replace little hoses. they um didnt think much about road side repairs for just a blown hose did they!and the seal behind the waterpump impellor, how do i get this out? pull front cover off? it looks like i can press it off on engine but what about getting impellor back on again? do i take front cover off?and 2 thermastats! are all 866 engines twin thermastat or is this an australian severe weather outback system? and engine has been sitting for 18mths, anything i should do?thanksGrant Quote Link to comment https://www.bigmacktrucks.com/topic/11045-866-issues/ Share on other sites More sharing options...
BAD DOG Posted October 15, 2009 Share Posted October 15, 2009 Nope forget about roadside hose repairs on one of those. Your waterpump impeller core assembly will pull right off the block once you've removed the housing. Pull it right out it's on a shaft with a moulded gear, you've got a square silicone O-ring recessed in th block to keep oil in behind it. I always exchanged mine for a remaned assembly which are'nt handy to get. You can take it apart on the bench if you want. You should be able to get a seal for it somewhere. It only has a roll pin through the impeller and shaft right at the tip, then the impeller should pull off with a puller like a harmonic balancer puller, be carefull not to break it. All 866's have two thermostats. Quote Link to comment https://www.bigmacktrucks.com/topic/11045-866-issues/#findComment-41939 Share on other sites More sharing options...
BAD DOG Posted October 15, 2009 Share Posted October 15, 2009 If it's sat for that long prime the oil system before starting it or you could end up seizing a bearing in the turbo or spinning a rod or main bearing. Quote Link to comment https://www.bigmacktrucks.com/topic/11045-866-issues/#findComment-41940 Share on other sites More sharing options...
Rob Posted October 15, 2009 Share Posted October 15, 2009 Nope forget about roadside hose repairs on one of those. Your waterpump impeller core assembly will pull right off the block once you've removed the housing. Pull it right out it's on a shaft with a moulded gear, you've got a square silicone O-ring recessed in th block to keep oil in behind it. I always exchanged mine for a remaned assembly which are'nt handy to get. You can take it apart on the bench if you want. You should be able to get a seal for it somewhere. It only has a roll pin through the impeller and shaft right at the tip, then the impeller should pull off with a puller like a harmonic balancer puller, be carefull not to break it. All 866's have two thermostats.I had no problems getting the seals needed for my V8 at an industrial seal supplier. If you have problems I'll replicate the order and get them for you. Real easy job to do once off the engine. Just be easy on the impeller wheel as Bad Dog mentioned. Rob Quote Plodding along with no job nor practical application for my existence, but still trying to fix what's broke. Link to comment https://www.bigmacktrucks.com/topic/11045-866-issues/#findComment-41942 Share on other sites More sharing options...
Rob Posted October 15, 2009 Share Posted October 15, 2009 If it's sat for that long prime the oil system before starting it or you could end up seizing a bearing in the turbo or spinning a rod or main bearing.I cranked my 866 engine with the engine stop pulled out till oil pressure stabilized. It sat for nine solid, (possibly more) years without being touched outside.Rob Quote Plodding along with no job nor practical application for my existence, but still trying to fix what's broke. Link to comment https://www.bigmacktrucks.com/topic/11045-866-issues/#findComment-41943 Share on other sites More sharing options...
ducky698 Posted October 15, 2009 Author Share Posted October 15, 2009 Hi, so once i have the pump housing off I should be able to take the impellor and shaft out with out pulling timing cover off engine? is this what you mean?its getting all new hoses around this thing before engine goes in. gotta give it a fighting chance of survival the cooling setup is impressive once you work out the system.Grant Quote Link to comment https://www.bigmacktrucks.com/topic/11045-866-issues/#findComment-41979 Share on other sites More sharing options...
BAD DOG Posted October 16, 2009 Share Posted October 16, 2009 Yes sir that's what I meant, It should just slide right out. Quote Link to comment https://www.bigmacktrucks.com/topic/11045-866-issues/#findComment-42002 Share on other sites More sharing options...
ducky698 Posted October 16, 2009 Author Share Posted October 16, 2009 Yes sir that's what I meant, It should just slide right out.hi, no worries, thankyou. will keep trying to get it out then, its a tite fit.Grant Quote Link to comment https://www.bigmacktrucks.com/topic/11045-866-issues/#findComment-42016 Share on other sites More sharing options...
Rob Posted October 16, 2009 Share Posted October 16, 2009 hi, no worries, thankyou. will keep trying to get it out then, its a tite fit.GrantGrant, I warmed the shaft on mine with a propane torch to expand it, then sprayed a penetrant oil on the pin area before it cooled. I think the oil is sucked into the interference fit of the pin and hole. The pin drove right out and was reused when put back together.Spray it "Dog Dick Pink" and it will jump out of there for you!!Rob Quote Plodding along with no job nor practical application for my existence, but still trying to fix what's broke. Link to comment https://www.bigmacktrucks.com/topic/11045-866-issues/#findComment-42017 Share on other sites More sharing options...
ducky698 Posted October 16, 2009 Author Share Posted October 16, 2009 Grant, I warmed the shaft on mine with a propane torch to expand it, then sprayed a penetrant oil on the pin area before it cooled. I think the oil is sucked into the interference fit of the pin and hole. The pin drove right out and was reused when put back together.Spray it "Dog Dick Pink" and it will jump out of there for you!!RobHi, the roll pin is missing. I havent got it out of the block yet, thats going to be the hardest part at the moment. should try that paint, it may work? Grant Quote Link to comment https://www.bigmacktrucks.com/topic/11045-866-issues/#findComment-42019 Share on other sites More sharing options...
Rob Posted October 16, 2009 Share Posted October 16, 2009 Hi, the roll pin is missing. I havent got it out of the block yet, thats going to be the hardest part at the moment. should try that paint, it may work? GrantHi Grant, don't be afraid to warm the housing with a propane torch. The cast iron both the housing and cover are made of will stick together due to rust over the years. I wouldn't use acetylene to heat as there is too much of a good thing there sometimes...... When you have the parts warm, rap on the pump housing with a plastic face hammer from any direction available and it will come loose. It is much easier when the engine is out of a chassis such as yours is. If you remember to paint it correctly before reassembly, you will never have a problem again!! Remember to use the right color!!!Rob Quote Plodding along with no job nor practical application for my existence, but still trying to fix what's broke. Link to comment https://www.bigmacktrucks.com/topic/11045-866-issues/#findComment-42022 Share on other sites More sharing options...
ducky698 Posted October 17, 2009 Author Share Posted October 17, 2009 Hi Grant, don't be afraid to warm the housing with a propane torch. The cast iron both the housing and cover are made of will stick together due to rust over the years. I wouldn't use acetylene to heat as there is too much of a good thing there sometimes...... When you have the parts warm, rap on the pump housing with a plastic face hammer from any direction available and it will come loose. It is much easier when the engine is out of a chassis such as yours is. If you remember to paint it correctly before reassembly, you will never have a problem again!! Remember to use the right color!!!RobHi, ok, pump impellor and shaft are out. the roll pin! um.... i see one end on the impellor but no other end in shaft. but if you turn shaft around there is a hole half way into shaft and then its solid. so either the pin is broke and impellor has moved or someone has drilled another hole an relocated the pin and welded it in? either way it is not coming off!where am i likely to get another impellor and shaft?Grant Quote Link to comment https://www.bigmacktrucks.com/topic/11045-866-issues/#findComment-42064 Share on other sites More sharing options...
Rob Posted October 17, 2009 Share Posted October 17, 2009 Hi, ok, pump impellor and shaft are out. the roll pin! um.... i see one end on the impellor but no other end in shaft. but if you turn shaft around there is a hole half way into shaft and then its solid. so either the pin is broke and impellor has moved or someone has drilled another hole an relocated the pin and welded it in? either way it is not coming off!where am i likely to get another impellor and shaft?GrantCan you send me a photo? I'm not quite sure what is going on there.Rob Quote Plodding along with no job nor practical application for my existence, but still trying to fix what's broke. Link to comment https://www.bigmacktrucks.com/topic/11045-866-issues/#findComment-42076 Share on other sites More sharing options...
ducky698 Posted October 18, 2009 Author Share Posted October 18, 2009 Can you send me a photo? I'm not quite sure what is going on there.RobHi, will take one tomorrow. i am guessing the bearing has failed, the pump bound up on casing and its sheared the pin? basicly there is a hole in the shaft where a pin would go. and there is a pin in impellor that is a 1/4 of a turn further around from that hole in shaft.Grant Quote Link to comment https://www.bigmacktrucks.com/topic/11045-866-issues/#findComment-42109 Share on other sites More sharing options...
ducky698 Posted October 19, 2009 Author Share Posted October 19, 2009 Can you send me a photo? I'm not quite sure what is going on there.RobHi, pic supplied. see the pin is not in line with the hole. and it doesnt want to pull off and none available in Australia and when they were available they were 397.00 audGrant Quote Link to comment https://www.bigmacktrucks.com/topic/11045-866-issues/#findComment-42129 Share on other sites More sharing options...
Rob Posted October 19, 2009 Share Posted October 19, 2009 Hi, pic supplied. see the pin is not in line with the hole. and it doesnt want to pull off and none available in Australia and when they were available they were 397.00 audGrantI've got an engine I'm going to use for parts. Let me check on it to see if it can help you.Rob Quote Plodding along with no job nor practical application for my existence, but still trying to fix what's broke. Link to comment https://www.bigmacktrucks.com/topic/11045-866-issues/#findComment-42130 Share on other sites More sharing options...
ducky698 Posted October 20, 2009 Author Share Posted October 20, 2009 I've got an engine I'm going to use for parts. Let me check on it to see if it can help you.RobHi, got the impellor off today. I was correct, it locked up and had sheared the pin! problem is it has cracked the impellor in front of the pin. the shaft is not to happy either.the bearing behind the timing cover case that the water pimp is driven by, are these fed by the oil system? or are they sealed? and is there any more sealed bearings on the front of this engine? the water pump isnt available new there is it? part #316GC1151A it cross refranced to 316GC1151EX here. Grant Quote Link to comment https://www.bigmacktrucks.com/topic/11045-866-issues/#findComment-42163 Share on other sites More sharing options...
ducky698 Posted November 2, 2009 Author Share Posted November 2, 2009 Hi, got the impellor off today. I was correct, it locked up and had sheared the pin! problem is it has cracked the impellor in front of the pin. the shaft is not to happy either.the bearing behind the timing cover case that the water pimp is driven by, are these fed by the oil system? or are they sealed? and is there any more sealed bearings on the front of this engine? the water pump isnt available new there is it? part #316GC1151A it cross refranced to 316GC1151EX here. Grant Quote Link to comment https://www.bigmacktrucks.com/topic/11045-866-issues/#findComment-42805 Share on other sites More sharing options...
ducky698 Posted November 2, 2009 Author Share Posted November 2, 2009 Thankyou everyone for your help. I found a impellor and a new shaft here, just waiting on the spring seal from Mack.Grant Quote Link to comment https://www.bigmacktrucks.com/topic/11045-866-issues/#findComment-42806 Share on other sites More sharing options...
skip Posted November 30, 2009 Share Posted November 30, 2009 Thankyou everyone for your help. I found a impellor and a new shaft here, just waiting on the spring seal from Mack.GrantFair Dinkum? Where did you find parts for it? Was it similar to an E9? Quote Link to comment https://www.bigmacktrucks.com/topic/11045-866-issues/#findComment-44119 Share on other sites More sharing options...
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