Hydraulic leak on backoe controls

[SAITCHO]

Hi guys, my beloved B26 TLB with 200 hours just sprung a leak in the backoe controls. I removed the housing and built a temporary wood support so I can have full access. I wiped down everything and went to work with my ghetto setup. After about 10 mins I could see oil drops from two places.

First leak is on top of the right outrigger valve. It leaks around the metal shaft that activate the valve.

Second leak is on the bottom of the thumb valve. There are drops of oil forming on the bottom hex bolt head and also runing down the metal shaft that activate the valve.

I hope my pictures will bring some clarity.

I have never messed around with valves in the past, is that as easy as removing the cover ,changing a seal or O-ring or is it more involving that that.

Thx for your help.

 

[North Idaho Wolfman]

2 Parts in there, a wiper and O-ring change both, Might suggest you just do them all while you have it apart.

 

[SAITCHO]

Thanks for the info. Here is a bigger version of the hydraulics schematics.

If I understand everything I will need to change part #360 and #370.
#360 O RING Pn/ 04816-00120 about 2$
#370 Wiper Pn/ RB401-70510 about 30$

Whats the procedure?

1-Remove both screw, take the lid off.
2-Pull the shaft out (do I need to unscrew it or will it simply slide out).
3-Will both the O ring and washer come out with the shaft or do I need to dig them out.
4-Replace both and put it all back in

Is there a way to minimize the oil mess like unplug the backhoe and drain oil from the connector or do it as it is.

It might seem something trivial for some of you guys but hydraulics is really not something I am familiar with so I want to make sure I can gather all the info I can get before starting this.

View attachment VALVE.pdf

 

[North Idaho Wolfman]

Remove the linkage off the spool valve (shaft).
Remove the retainer plate.
You do not or can not remove the spool valve.
Use a pick to take out and off the wiper and O ring.
Replace and reassemble.