Adjusting hydros Husq 4818

[WhitakerServices]

I am trying to adjust the hydros on my Husqvarna 4818 so that the wheels will not turn while the neutral bale is engaged. I have the rear wheels off the ground but the problem is that I am out of the range of adjustment (point "C")of the steering rods.
Is there a coarse adjustment? Perhaps by repositioning on the pump shaft at point "A"
I am assuming that adjustment "B" is the reverse stop.

[WhitakerServices]

Please Help

[JimQ]

Can you tell me the machine model number? I may be able to pull some drawings and find out for you.

Q

[WhitakerServices]

thanks for your reply the model number is

WH 4818 E

Motor is a Kawi , and it is a floating deck, hydro, ets controls

I have not been able to find much about this mower online and I would appreciate any help

I have gotten the "neutral creeping" set better than it was but the jam nut on the bottom of the steering rods is only holding by a few threads. Is this an indicator of pump wear?