Simple question. When replacing hydraulic oil sight glass on a L2850 GST on the left side of the transmission, do I put oil on the rubber seal or just put it in dry?
Replacing hydraulic oil sight glass
- Thread starter Bugfry
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North Idaho Wolfman
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Equipment
L3450DT-GST, Woods FEL, B7100 HSD, FEL, 60" SB, 743 Bobcat with V2203, and more
I agree with the silicone suggestion. I put off replacing the sight glass on my previous L3410 for a very long time because I mistakenly thought it would be a difficult and messy job... Ended up being the easiest repair I have ever done!
Yep, it's about $7 piece and a 2 minute job. Tech at Coleman's suggested a bit of silicon, just as other have mentioned.
Thanks guys! I had thought of silicone also. Removed the old one today and it was cracked. I will use silicone. Thanks for the quick response and advice!
Can you tell me how you removed the sight glass? I have recently noticed that there is a leak at my site glass. Also, can anyone tell me if a coloring additive is available for hydraulic fluid, seeing the line in the glass is very difficult.
North Idaho Wolfman
Moderator
Staff member
Lifetime Member
Equipment
L3450DT-GST, Woods FEL, B7100 HSD, FEL, 60" SB, 743 Bobcat with V2203, and more
It's just pressed in, put a screwdriver or small pry bar under it and pop it out!
drain at least some of the hydraulic fluid out of it before you pop it out or you'll have a heck of a mess.
You can get hydraulic fluid dyes, here is one that works, caution a little goes a LONG ways.
https://www.ebay.com/p/John-Deere-Original-Equipment-Hydraulic-Oil-Dye-mt3668/1052411518
https://www.amazon.com/John-Deere-Oil/dp/B00TFXHBXW
I don't know if this was smart but my sight glass was leaking (small leak) around the outside of the glass. The glass itself was okay. I cleaned off the oil with brake cleaner spray and mixed up some JB Weld and squeezed it around the glass with a tooth pick. Finished it off using a Q-Tip and pushed on the weld . Let it stay overnight and hasn't leaked in a year so far.
Service guy I talked to said not to use anything too permanent after I suggested using gasket maker on our L4300D. Said some kind of epoxy would do fine, but wasn’t really specific. I guess it will matter if you ever have to take it out again.