Got the flywheel back from the machinists yesterday. Looks great! They flipped the ring gear, cut the blades down and balanced. I also ordered the replacement tube from Bobcat. Looks like good weather Sunday so I'll be in the belly of the beast pulling the hydrostatic pump!
HanSolo: Thanks for the pictures. Do you have 3 Zerk fittings on your new U-Joint?
Yes. One on each segment of the u-joint and one on the coupler.
HanSolo: Thanks, I now feel a lot better, since I lubed 3 Zerks on my 843. Looking forward to when you get the 843 running again. Good luck.
Looks good, i wonder how much air flow it will have cut down on, hopefully it will still have more than enough to keep cool.
Alrighty. I got the hydrostatic pump out yesterday. Not too much drama. Hardest part was getting to the 15/16" bolt on the underside of the pump. I had to cut a wrench in half to get 1/8 turns. First I removed the large mounting bracket at the back of the pump which gives you great access to hoses. That also gives you the ability to jack the rear of the pump up.
Fedex ground is your friend! I paid about $40 to have a transmission shipped. I was impressed with the price. But open an account online. Dont go into a store. you will pay more!
Nice job getting it out.
Nice pics. I took my cherry picker to lift up the pump so I could get to the bolt. I had a wrench that would fit barely in there ( I have long arms ) and I could get a tiny turn each time eventually getting it out. We got our pump ready to rebuild at the shop, $920 bucks parts and labor. Also my smaller servo was broken exactly like yours. They can put a new shaft in by just removing a snap ring, no big deal. Also I'm getting a used ( not broken ) blower flywheel from a Bobcat scrap yard in Texas. My uncle knows some people down there and is hooking me up. Not sure on that price yet.
Hello Aaron, can you check to see if that wrecking yard has the flywheel side motor plate for a 843? I have cherry 843 that has had a poor repair done on the starter area of the plate. Let me know, would appreciate it. Thanks
UPDATE: I ordered the U-joints from Drivetrain America's website, The hydraulic pump is ready to be picked up tomorrow, we ordered a new flywheel from the "Stealer"ship today because we were unable to find a blower flywheel from a scrap yard. So as soon as the parts get here, its time for work
Very interesting that both our 843 repairs are following almost identical time-line. My rear pump is on the way back from Central Hydraulics. I expect delivery today or tomorrow. I got the replacement tube installed already and bought a much needed set of large SAE sockets and wrenches. I also have the needed o-rings so might be able to start putting things back together this weekend.
Hansolo, this is super important. The guy who rebuilt my pump said that it was crucial to manually put the required hydraulic fluid in the pump ( likely through the large lines on the sides ) and to turn it over by hand ( or put a wrench or something on it ). Just make sure its full before you put it all back together and running. Also, make sure there is not a cutoff valve in there. He said he's seen a lot of pumps come back because they didnt work ( not installed correctly ) he said when he pulled them apart they were bone dry. So check and double check all your lines to make sure that the hydraulic fluid can flow freely.
Copy that Aaron. Dave at Central Hydraulics recommended another way. Put as much fluid in the charge hose as it will take (that comes off the filter to the T fitting on the right side). Then just bump the starter a dozen or so times with out actually starting the motor. He said the pump should be primed after that. I got the pump back in today, all hoses hooked back up, fuel tank back on and shroud back in. I'm going to do a little welding on the motor plate. There's a crack by the starter. Then it will be time to stuff that joker back in! Pictures soon.
Love the pics and the updates
I'm not sure how your pumps are plumbed, but with the 743's i have worked on, i primed my pump by filling the oil tank, then i had a helper put their heel on the lift pedal then pulled the lift cylinders out. This draws oil from the tank, through the pump(s) to the cylinder. I did that with both cylinders to get as much in as possible, then get them to push the pedal the other way, then push the ram sticks in. Then retract, just to get as much oil in as possible.Love the pics and the updates
That's a great idea Tazza! I'll take it a step further though and use my M700 to lift the arms of the 843 with a buddy pressing on the peddle. I know there's a charge hose going straight into that rear pump. I'll keep an eye on the fluid level in the tank as I'm doing that. If it goes down, it's moving somewhere! Here's some photos of this weekends's fun. Here's the rebuilt pump. Note that they put the pintle flange on upside down. Took me a while to figure out why the arm mounting holes weren't lining up as they should. Duh!
Using the other machine will work. Just remember to put blocks or a jack under the rear when you do it, you don't wanna topple the machine backwards with your mate inside.
Already up on blocks on the rear and I think it would be best to block up the front too. When I start testing the drive motors, it's probably adviseable to have the least resistance. Speaking of hydraulic fluid - does anyone know what the fluid capacity is on the 843?
