Honda HF2417 cutting deck squeeks on starting the blades and wont cut on lower position?

[ChillnKill]

Hi guys
runs fine and cuts at high level but as you lower she squeeks and clogs up. I think its a belt tension thing but I dont know how to adjust.
Any help would be welcome thanks.

 

[mechanic mark]

Remove deck & clean, remove blades & clean, inspect, sharpen & balance blades, grease spindles & lube all moving parts, if applicable check air gap at PTO Clutch should be .012-.015, inspect belts & underside of tractor before reinstalling deck. Always engage PTO & blades at full throttle. Let us know how it goes, thanks Mark