Breather is Plugged or Damaged.
Front pin locks will not release if breather is plugged or damaged.
Remove breather from curb-side air cylinder (Figure 6).
FRONT PIN LOCK
Air Cylinder Breather.
Remove breather from road-side air cylinder (Figure 6).
Pull and release curb-side and road-side latch handles to extend and contract air cylinders
If air cylinders extend and contract smoothly, perform the following:
Install air cylinder guard to road-side front pin lock with two screws and lockwashers
Install air cylinder guard to curb-side front pin lock with two screws and lockwashers
Verify problem is corrected.
If air cylinders do not extend or contract or move slowly and bind, install breathers
(Figure 6) and proceed to next Malfunction.