John Deere 2155 Rocker Shaft assy will not lower beyond half way

[kchansen]

Hello. This morning I went through the adjustment procedure laid out in TM4435 (page 70-15-15+). I adjusted 17, the load control arm and then 7, the commencement of lift. At one point my arms went all the way down. I thought it was fixed with this adjustment, but nope. I tried multiple things. Then I noticed how I could move the load control arm, 14, about an 1" back and forth with zero resistance. I'm thinking this should not be loose. I also observed when I moved 17, I could see the arm move. So, I'm thinking the spring as TXJim mentioned. Tonight I will try with some filler rod with some bends to probe in and see if I can move the arm to actuate the lowering, and maybe I can find a bore camera. I was curious if anyone has felt the load control arm. Is it loose in movement so your can move, jiggle easily or is it firmly riding on the mount pins.

 

[kchansen]

Does anyone has the diag manual TM4436? Was curious if it offers solutions. Curious if a library has it.

 

[Tx Jim]

According to tech manual for a 2040 that I have which should be identical adjustment it states negative stop screw(item A) to turn in until screw contact L/D arm then turn back out 1/8 turn.

 

[kchansen]

According to tech manual for a 2040 that I have which should be identical adjustment it states negative stop screw(item A) to turn in until screw contact L/D arm then turn back out 1/8 turn.

Looks like the spring inside is broken or came off. There is no resistance to the load arm. I'm using as is, which is good enough for snow removal with the box blade. Once I have completed other maint projects I will service the Rockershaft assy and update. Thank you!