Hi all!
I'm writing from Halifax in the UK.
I am genuinely devastated as my lovely Hyster S3.00XL has developed a massive problem. I think it is an A187 with Isuzu gas engine.
I was hoping someone on here could advise in any way.
It has been occasionally slow to go into forward or reverse for the last year but not massively so. But today, it just wouldn't go into reverse and the neutral was like the forward gear amd the forward was working as forward as usual. When putting into reverse it just won't go and we tried to pull it with another forklift but the wheels wouldn't turn!
Come to think of it, on 2 occasions, it went into reverse and started shaking. But then worked normally. I don't know what's happened to it. Sob.
I love Mr Forks, he is very narrow, very small and has an immaculate 3 stage mast and it can handle 3 tonnes.
It's a gas one and has run so reliably for our little operation in Yorkshire.
I would REALLY hate to scrap it and if someone locally could have a look or attempt a repair I would obviously pay good money for it.
Here's hoping some kind people can save this beauty from the scrappers!
Thanks for reading anyway chums !
Showing items 1 - 14 of 14 results.
You don't need to drop the mast or take the transmission out. You'll need to take the engine out and before you doo put a block under the gearbox case do the gearbox doesn't fall. Remove the torque converter then the transmission pump then front plate. You'll then be able to remove the clutch packs. It is a fairly straight forward job to do
Understood. I was hoping otherwise...I am thinking I should take the valve body off first and maybe get a seal kit before trying to get at and into the transmission. I'll price it out with a local forklift shop, but if it's too expensive I'll get an engine hoist and take it on myself. I'm about to retire so I have the time. I don't know how to drop the mast so I guess I'll be taking out the engine and then opening up the transmission. As opposed to trying to come out the front. I have the Service manual but just getting to the clutch packs (forward and reverse) looks pretty complex.
It does sound like the forward pack has failed if your lucky it will be seal failure on the pack but more than likely the plates have failed. Not a parts expensive job but labour intensive. You will need the engine out gearbix front plate off to get to the packs
Red oil ie atf or dexron 2 is not the correct oil to use in hyster transmissions, they require jd40 spec oil. The truck will run OK but as soon as the truck stops and the clutch packs dry out the linings disintegrate.
I've seen this so many times and had to tell lots of customers why they are going to be charged a fortune for a transmission overall. Use the correct oil don't just guess. Would you just put any old engine oil in your car engine??
It will more than likely need a clutch pack in it, forward direction is always the first clutch pack to fail because they go forwards more often than backwards.
Thanks lifter01! I had to go buy another 2 gallons (of Super Tech Heavy Duty Tractor Hydraulic and Transmission Fluid - Walmart) and the 1-1/2 socket, but successfully changed the transmission fluid 3 times to get it to be mostly not red. I still have 1 gallon left and will try a 4th change. The screen filter wasn't clogged but did have some small black chips. I can now move forward but forward lacks power (cannot go up a slight incline)...hoping this is a sign of a blown o-ring or something instead of a frozen clutch pack. I forgot to mention, I pressure tested all the valve body ports and they are within spec I also checked the 3 other ports on the transmission itself and they are also withing spec. Thoughts on what to do next?
Can anybody explain why the red oil is such a problem? I use it all the time and never had an issue. Surely all transmissions are just full of bearings, seals and clutch packs/linings. What makes one differ from the other?
Bottom of the transmission on the left hand side looking from the back. A big bolt it's got a big spring and a gauze filter behind it. Good look on this one I hope your clutch plates haven't destroyed themselves
@lifter01 You may have just helped me figure out my issue. Bought an S60XL that only moves in reverse. It's the Monotrol T42 transmission with the Mazda M4 LPG engine...I've bench-tested the solenoids for forward and reverse and pressure-tested all the ports, but the whole time I never questioned the shiny new-looking RED transmission fluid! I bought some of the tractor hydraulic transmission fluid from the local Walmart and sure enough, it's light brown!! Now, I just need to figure out where the drain plug is...
As promised: an update to what happened if anyone is reading this in the future.
The garage I used Changed the valves and seals at the top of the gearbox, this did not work unfortunately.
I then found an identical forklift for sale on ebay but in significantly worse condition - but the gearbox was absolutely fine!
The gearbox was swapped and it is now fixed.
It wasn't an easy job and they had a bad time getting the box to line up again but all is well.
It was a significant cost and I don't know if I would go down that road again.
But the guys at JLB specialist mechanics in Halifax are a decent, hardworking, honest and down to earth bunch. And I will always trust them with any jobs like this. They've done a great job.
I will now try to strip down my knackered gearbox and try to find new plates etc for it.
Cheers for reading.
Many thanks for taking the time to let me know this: I appreciate it.
I will give you an update as soon as I can and will tell them this now.
It looks like they've taken the engine out etc from what I could see from the yard when passing.
It does sound or me as if one of the clutch packs has lost the linings off the clutch plates and has locked the clutch pack up it is a fault I've come across a few times on the older Hyster transmissions (but usually caused by the wrong oil being used) and will probably need a transmission strip down to rectify. A good few years since I've had this problem but the last one I did was from a stone yard in Keighley with exactly the same problem and the problem I've described. Not a massively expensive job parts wise but labour intensive unfortunately, the engine will need to be pulled and the transmission front plates removed to get at the packs
Thanks for taking the time to reply: much appreciated.
It has gold oil in it and it looks in very good condition.
Yes it still tries to drive forwards in neutral but I have given it to my local plant mechanics, JLB specialist vehicles in Halifax to look at. They did a very good job last time with rhe head gasket on it so I am hoping they will fix it again this time. Fingers crossed.
I will make sure that I update this thread with any information I get from them, good or bad.
Thanks for giving me the engine code and make!
A couple of questions for you the first what transmission oil are you using in it? I'm asking becuase lots of people put dexron 2 atf in them (it's the red oil that car automatic transmissions use) if it has red oil in it then that's a massive problem. The second is does the truck still seem to be trying to drive when it's in neutral??
The engine is a Mazda m4.166 engine old but bombproof
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