• Thank you for visiting HeavyEquipmentForums.com! Our objective is to provide industry professionals a place to gather to exchange questions, answers and ideas. We welcome you to register using the "Register" icon at the top of the page. We'd appreciate any help you can offer in spreading the word of our new site. The more members that join, the bigger resource for all to enjoy. Thank you!

Questions about operation of a JRB hydraulic quick disconnect on a Komatsu PC 200 LC

Blu Ox

Member
Joined
Sep 17, 2015
Messages
21
Location
Minnesota
We recently purchased a Komatsu PC200 LC-7 and is equipped with the JRB quick connect option.
The dealer who sold us this machine is not familiar to this system and neither am I.
I have been searching YouTube but nothing found.

I assume after I trip the switch in the cab, I am to roll the bucket...I hope.
Unfortunately the machine is headed to a job site otherwise I'd run outside and give it an experimental run.

If any of you experts out there have knowledge and know the steps to activate the system, I would be grateful for a reply.
Thank you in advance.

:usa
 

AntonioRocha

Well-Known Member
Joined
Jan 17, 2010
Messages
95
Location
portugal
Im not familiar with that brand of hydraulic quick hitch, altough you may follow the hydraulic pipes from the quick hitch, then you will find a solenoid valve with a bunch of pipes attached, two o them shoud go to the quick hitch, to open or close, other is going to the return to hydraulic tank, other should bring pressure from somewhere, in a Komatsu we have here, it picks pressure in the line that makes closing the bucket, só its always needed to make the opening the bucket movement to fully open the quick hitch, other machines pick the pressure directly drom the hydraulic pump, só its not needed to make any movement to make the quick hitch to open, just press a switch inside the cab.
 

buckfever

Senior Member
Joined
Aug 12, 2010
Messages
813
Location
southwest pa
You got the idea. Flip the switch and curl the bucket in to apply pressure to the coupler. Once you switch buckets curl the bucket in and flip the switch off. A good habit to get into is after you change buckets always push the back of the teeth against the ground. This way if the connection is not done right the bucket will come of then and not in the ditch or God forbid on someone's head.
 

John C.

Senior Member
Joined
Jun 11, 2007
Messages
12,865
Location
Northwest
Occupation
Machinery & Equipment Appraiser
I always curl the bucket before shifting the toggle. I am assuming this is a pin grab quick coupler. I can't recall if the JRB has the drop lever that keeps the bucket from fully releasing unless it is curled and the stick all pulled in. Buck fever is right on in checking that it is fully latched. It is also good to make sure anytime you might have a man working under the bucket.
 

qball

Senior Member
Joined
Dec 30, 2007
Messages
1,072
Location
il
Occupation
local 150 operator
Pull the stick in more than 90% to the cab, hit the switch, cycle the bucket curl.
 

Shimmy1

Senior Member
Joined
Aug 14, 2014
Messages
4,258
Location
North Dakota
Same coupler I have. The lock likes to stick when it's cold. To unstick, curl the bucket all the way in. Then, you can look down under the main pin hook and see the lock. It'll be right next to the cylinder. Couple taps with a decent size bar will pop it out. Flip switch, and hold bucket curl-in for about 5-7 sec and that's it. After you switch buckets, don't move switch back to "lock" until you have bucket fully curled.
 

Shimmy1

Senior Member
Joined
Aug 14, 2014
Messages
4,258
Location
North Dakota
And grease those locking pins!
It's a coupler on an excavator, Willie. No locking pins, just a weighted arm that swings into place to prevent the pin grabbing mechanism from releasing. It only falls out of place when the bucket is more than 75% curled in. I put some JD cornhead grease in mine so it moves a little better when it's cold.
 
Top