In Reply to: Re: maintenance posted by doug on December 29, 2017 at 11:02:19:
The top cover is very heavy so getting someone to help you with it might be a good idea. If you don't have a repair manual, you can find a lot of info online and on this site on the hydraulics. The NAA hydraulics is mostly in the top cover. Once you back the valve out on the side like I mention then the cover should come off. If someone used a lot of sealer before, you will have fun getting it loose. One place to pay particular attention to is the area where the oil line comes up in the front right corner of the housing. sometimes there are leaks at this spot and getting the damage to the housing fixed can be troublesome. Need to look close at that area. Be sure to check the linkage for wear and then it is advisable to check the adjustments of the linkage. Cleaning the housing can be accomplished with a sprayer and lots of rags. It's a pain.
One more word of caution, be prepared for about 5-gal of oil to come out fast when you pull the plug.