Hydro-boost not working

[Martimus]

82 K30 long bed. Sometimes my steering works just fine, and sometimes I cant hardly turn the steering wheel, seems like I get no assist from the hydro-boost. It's full, belt is good and not slipping. Any ideas would be helpful, thanks in advance.

 

[fast 99]

Item in common is pump. That's where I would start. Flush out old oil if discolored or burnt.

 

[Strick]

The pump should supply hydraulic pressure to the brake unit. There's an accumulator (round can) on the unit that retains pressure for a few stops should the pump quit/belt slip/engine die. I'd flush the p/s fluid & make certain the belt is tight before I started replacing pumps & boosters tho.

HS