jerky bobcat

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signdude

New member
Joined
Feb 27, 2020
Messages
3
1 have a older 630 bobcat that the sticks are real sensitive. replaced everything as far as bushings and parts on the linjage and adjusted for neutral. still seems jerky. plenty of power on everything. anything else to look for? i changed all filters. this thing will buck you out at times thank you
 

trobbl

Active member
Joined
Oct 19, 2021
Messages
32
I had a similar problem with my 530. I pulled off the seat pan and noticed the hydro pump would move back and forth quite a bit when I moved the sticks. I first thought it was worn pump mounts. Fast forward to another project where I had to pull the engine to get at a hydraulic leak. I was shocked to find that both of the bolts that hold the pump to the engine were completely missing. I replaced the bolts when I finished my hydraulic fix and the jerkyness disappeared. Just know the bolts are really hard to reach and it required a lot of contortion and cursing to get it back together.
 
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