lamountain1976 Posted January 4, 2008 Share Posted January 4, 2008 Who knows something about the pumps that lift the cab up? Mine leaks pretty badly - are there seal kits available? If not, maybe (used) replacement pumps around? Who manufactured them? Is there much variety among the pumps used on the COE model Macks? Quote Justin LaMountain Consulting Forester and Horselogger Green Man Forestry Link to comment https://www.bigmacktrucks.com/topic/3257-coe-lift-pump/ Share on other sites More sharing options...
ThaddeusW Posted January 5, 2008 Share Posted January 5, 2008 It should be a standard hand hydraulic pump. McMaster Carr carries one in their catalog on page 1324. Just enter 1324 in the search bar on the left and scroll down. The 3000 PSI pump costs $474 though. There might be a cheaper source but I don't have one at the moment.Or I bet you could use one from an MR, just go to a Mack dealer and ask for a cab tilt pump for an MR. Maybe even a junk yard. Quote -Thad What America needs is less bull and more Bulldog! Link to comment https://www.bigmacktrucks.com/topic/3257-coe-lift-pump/#findComment-16042 Share on other sites More sharing options...
David Posted January 5, 2008 Share Posted January 5, 2008 There is one for a MH now on ebay. Quote Link to comment https://www.bigmacktrucks.com/topic/3257-coe-lift-pump/#findComment-16045 Share on other sites More sharing options...
Rob Posted January 5, 2008 Share Posted January 5, 2008 Who knows something about the pumps that lift the cab up? Mine leaks pretty badly - are there seal kits available? If not, maybe (used) replacement pumps around? Who manufactured them? Is there much variety among the pumps used on the COE model Macks?If you are not interested in originality, plumb in a hand pump from a porta power. Be careful if you do this as the pressure is a lot higher. Some pumps have adjustable relief valves, some do not.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/3257-coe-lift-pump/#findComment-16048 Share on other sites More sharing options...
lamountain1976 Posted January 5, 2008 Author Share Posted January 5, 2008 If you are not interested in originality, plumb in a hand pump from a porta power. Be careful if you do this as the pressure is a lot higher. Some pumps have adjustable relief valves, some do not.RobI'm not interested in originality, but I don't understand. What is a porta power pump? Quote Justin LaMountain Consulting Forester and Horselogger Green Man Forestry Link to comment https://www.bigmacktrucks.com/topic/3257-coe-lift-pump/#findComment-16052 Share on other sites More sharing options...
Rob Posted January 5, 2008 Share Posted January 5, 2008 I'm not interested in originality, but I don't understand. What is a porta power pump?It is a remote reservoir and pump unit with a handle much like a hydraulic bottle jack minus the cylinder ram.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/3257-coe-lift-pump/#findComment-16053 Share on other sites More sharing options...
lamountain1976 Posted January 5, 2008 Author Share Posted January 5, 2008 It should be a standard hand hydraulic pump. McMaster Carr carries one in their catalog on page 1324. Just enter 1324 in the search bar on the left and scroll down. The 3000 PSI pump costs $474 though. There might be a cheaper source but I don't have one at the moment.Or I bet you could use one from an MR, just go to a Mack dealer and ask for a cab tilt pump for an MR. Maybe even a junk yard.What is an MR? Quote Justin LaMountain Consulting Forester and Horselogger Green Man Forestry Link to comment https://www.bigmacktrucks.com/topic/3257-coe-lift-pump/#findComment-16054 Share on other sites More sharing options...
lamountain1976 Posted January 5, 2008 Author Share Posted January 5, 2008 It is a remote reservoir and pump unit with a handle much like a hydraulic bottle jack minus the cylinder ram.RobWhat kind of pressure is required to tilt the cab? Quote Justin LaMountain Consulting Forester and Horselogger Green Man Forestry Link to comment https://www.bigmacktrucks.com/topic/3257-coe-lift-pump/#findComment-16055 Share on other sites More sharing options...
Rob Posted January 5, 2008 Share Posted January 5, 2008 What kind of pressure is required to tilt the cab?I'll be 1000# would be adequate for that application as there is not much weight. Most porta power pumps are rated at 10,000# for a 10 ton rating at the ram. Most, (like Blackhawk, Porter-Ferguson) can be turned much lower by an adjustment screw. You could use it as is if you didn't keep pumping when you got to the limit of cab travel.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/3257-coe-lift-pump/#findComment-16057 Share on other sites More sharing options...
lamountain1976 Posted January 14, 2008 Author Share Posted January 14, 2008 Rather than replacing the entire pump, are there rebuild (seal) kits available to repair these cab jack pumps? Quote Justin LaMountain Consulting Forester and Horselogger Green Man Forestry Link to comment https://www.bigmacktrucks.com/topic/3257-coe-lift-pump/#findComment-16251 Share on other sites More sharing options...
other dog Posted January 19, 2008 Share Posted January 19, 2008 all excellent ideas,but my first trip would be to the used truck parts/recycler/junk yard to see if they have a Cruiseliner. You might run across any number of parts you might need if they do,and you know they'll fit. Quote Producer of poorly photo-chopped pictures since 1999. Link to comment https://www.bigmacktrucks.com/topic/3257-coe-lift-pump/#findComment-16379 Share on other sites More sharing options...
lamountain1976 Posted January 23, 2008 Author Share Posted January 23, 2008 all excellent ideas,but my first trip would be to the used truck parts/recycler/junk yard to see if they have a Cruiseliner. You might run across any number of parts you might need if they do,and you know they'll fit.I looked around the area. No heavy truck salvage yards in Northern VA. New pumps are running 250 or so. I picked up a seal kit for 50. Just got here yesterday. Hope its the right kit. Quote Justin LaMountain Consulting Forester and Horselogger Green Man Forestry Link to comment https://www.bigmacktrucks.com/topic/3257-coe-lift-pump/#findComment-16471 Share on other sites More sharing options...
theakerstwo Posted January 23, 2008 Share Posted January 23, 2008 I looked around the area. No heavy truck salvage yards in Northern VA. New pumps are running 250 or so. I picked up a seal kit for 50. Just got here yesterday. Hope its the right kit. You said that your old pump was leaking bad and i did not under stand where it was leaking.If the pump it self is leaking then maybe you can repair but if you are saying that it leaks down when you pump it up then it may be a ram leaking by the seals and that is easy to check. glenn Quote glenn akers Link to comment https://www.bigmacktrucks.com/topic/3257-coe-lift-pump/#findComment-16477 Share on other sites More sharing options...
lamountain1976 Posted January 24, 2008 Author Share Posted January 24, 2008 You said that your old pump was leaking bad and i did not under stand where it was leaking.If the pump it self is leaking then maybe you can repair but if you are saying that it leaks down when you pump it up then it may be a ram leaking by the seals and that is easy to check. glennYeah, it leaks down. Once I get the cab up aways, it wants to sag back down. Looks like most of the fluid is coming out around main cylinder or ram as you call it. I am hoping to rebuild the thing. The kit has many parts, mostly O-rings and back-up rings, but also copper washers and ball bearings. I guess you just tear the thing apart and match up seals, eh? Quote Justin LaMountain Consulting Forester and Horselogger Green Man Forestry Link to comment https://www.bigmacktrucks.com/topic/3257-coe-lift-pump/#findComment-16491 Share on other sites More sharing options...
lamountain1976 Posted February 2, 2008 Author Share Posted February 2, 2008 Yeah, it leaks down. Once I get the cab up aways, it wants to sag back down. Looks like most of the fluid is coming out around main cylinder or ram as you call it. I am hoping to rebuild the thing. The kit has many parts, mostly O-rings and back-up rings, but also copper washers and ball bearings. I guess you just tear the thing apart and match up seals, eh?I found a pump, thanks. Quote Justin LaMountain Consulting Forester and Horselogger Green Man Forestry Link to comment https://www.bigmacktrucks.com/topic/3257-coe-lift-pump/#findComment-16688 Share on other sites More sharing options...
itlldo1 Posted May 28, 2010 Share Posted May 28, 2010 I found this thread using the search tool. I need help w my 78 F Model. Cab went halfway up one time, and then came slowly down on its own-no blown cylinders or hydraulic lines. I cleaned the pump out and reinstalled it. It will release the latches, but now will not jack the cab off the stops. I tried another pump-same results. Once the latches are fully released the pump comes to a stop like something is blocked off. When I release the pressure on the jack, the latches set themselves, and there is slack on the lift cylinders-I can slide them on the pins. When jacking the slack is gone and the cylinders tighten up against the mounting bolts like they're trying to lift. There is a small tag that says something about a hydraulic checkvalve but it isn't totally readable. Anyone got any ideas? Mike Quote Is it just me or did those buffalo wings taste like chicken? Link to comment https://www.bigmacktrucks.com/topic/3257-coe-lift-pump/#findComment-55929 Share on other sites More sharing options...
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