Grove Hydraulic Body

[Mechanicsville804]

Hey guys,

I'm looking for an old hydraulic body for a grove Mobile crane

 

[Mechanicsville804]

Any advice on where to find one would be greatly appreciated.

 

[Knepptune]

Grove should have one. It’s most likely a Parker valve but it’ll be a captured part meaning you can only buy it from grove. I don’t know who your grove dealer would be. But I’ll bet you that valve is on a shelf in their warehouse.

call your dealer with the model and serial #’s. It’ll be expensive but if your wanting to replace the whole valve that’ll be the easiest route.

 

[Mechanicsville804]

Thank you, I’ve tried but the machine is too old to find a new. I’m looking for used or another hydraulic valve to retro fit on our machine.

 

[Vetech63]

Whats wrong with the old one?

 

[Mechanicsville804]

The old one is leaking past the o-rings at the individual slices of the valve body. The o-ring seats have broke due to over tightening the valve body.

 

[Mechanicsville804]

We have a machine shop at our disposal but the valve body is made of hardened steel.

 

[Mechanicsville804]

Open to all suggestions, thank you. And if anyone knows where we can find a used we would really like that.

 

[crane operator]

Which one of the sectors is cracked?

 

[crane operator]

The middle section is for second winch, which it appears you don’t have. If the third section which goes to the winch is the one cracked, you can pull that section out and use the good one and just shorten the stack one section

 

[crane operator]

Any 700b series either Rt or Tms mid 90’s early 2000’s should use that same pilot control. The later 500 and 700e’s may use it with the I’ll look at mine. It’s just pilot control, you may have to do a little fitting adapting

 

[Mechanicsville804]

The middle section is for second winch, which it appears you don’t have. If the third section which goes to the winch is the one cracked, you can pull that section out and use the good one and just shorten the stack one section

yessir that is for a auxilary hoist that we dont have. All three sections are leaking from the 0-ring seats.

 

[Mechanicsville804]

Any 700b series either Rt or Tms mid 90’s early 2000’s should use that same pilot control. The later 500 and 700e’s may use it with the I’ll look at mine. It’s just pilot control, you may have to do a little fitting adapting

I appreaciate that Crane Operator, I'll try to find something from those series today. Yessir, I believe youre right with a little retro fitting it should do fine.

 

[crane operator]

I can’t see how you could have all the sections cracked, unless it was full of water and froze, but I sure haven’t seen everything.

 

[Mechanicsville804]

You have to look at the O-Ring seats, look closely at each O-Ring, I can circle and repost if you don’t see. Zoom in on the individual pictures in the post that show the ports, and they haven’t cracked due to freezing but due to over-tightening the valve body together.

 

[crane operator]

I wasn’t doubting that they are cracked, I just amazed that the overtightening would crack all the sections. I doubt I could see the cracks on my phone.

I would have thought once any section cracked, it would have relieved the tension, and the crack would stop at the first one that cracked, not getting all the sections.

 

[Mechanicsville804]

Yessir, that lip is so incredibly thin and it sits lo but not too low so that the OA-ring can sit out enough to make contact and seal tight so the first thing to go is those little lips.

 

[Welder Dave]

Could the sections be repaired on a lapping machine and the o-ring grooves be cleaned up? With the right tooling hardened steel can be machined. The valve was machined when it was made.

 

[Mechanicsville804]

Hey Welder Dave, I appreciate that, I don't think so because the seat is gone in someplaces where it has cracked of from the section and is completely missing, I know the picture doesn't probably show it because the O-Ring is covering it up. But keep the ideas coming!

 

[ferrret3238]

How about a copper oring? Not oem but maybe something like a copper ring on a banjo fitting? I believe those monoblock hydraulic valves are cast iron and could be machined but it would change the dimensions of the stack and make hose connections a pain. Also thought maybe it could be sleeved inside so the oring doesnt get mashed in and leak? Not really sure if its leaking cause of oring failure of a crack near the oring seats?