Steer axle leaf spring bushings and hangers question

wonderig if anybody can help me out . I was getting a loud popping noise on my front end suspensionr (I think), every time I turn left or right when I’m loaded . They told me It was my bushing and pins on leaf spring. It’s on a tandem dump truck . My question is how do you know if spring bushing and pins are worn. A guy told me it was worn because the washer between spring and shackle is loose? I swapped out rear leaf spring pin and bushing as well as the hanger on once side of the front suspension but the same washer that was loose it’s still loose? Any ideas. Thank you

 

It’s on a 1994 Peterbilt 378.

 

I replaced one side . I’m doing other side today after work. I’m only doing the rear pin and bushings on front suspension . The been poopin for a while just got louder last week . Once I swap out the other side I’ll let ya know if it still pops

 

Are you talking about shackles when you say side bars ? Yea when I took it apart it has 4 thick washers total. One on each side in the spring and one on each side of the hanger, in between shackles or bars.

On one side between spring and shackle i can move washer it has some play even after I replaced bushings so I’m guessing I have to add shims on that side that’s loose ?