Air system must be drained prior to pneumatic lines being disconnected or
inadvertent operation of the semitrailer brake valve during platform adjustments
may result in injury to personnel.
Operate brake valve (para. 2-8) several times until all reserve air is drained from air tanks.
At affected bogie, using isolation valve handle extension, close suspension isolation valve (1), handle facing
outboard from center of platform.
All fittings and openings must be capped or plugged immediately after opening to
prevent dirt, moisture, or foreign material from entering the hydraulic or pneumatic
systems or damage to equipment may result.
Place drain pan under suspension isolation valve (1). Tag and disconnect two hydraulic hoses (14) from
suspension isolation valve (1) at affected bogie (11). Install caps/plugs into openings on isolation valve (1). Place
ends of hose into opening in drain pan and secure in place using masking tape.
Tag and disconnect two pneumatic hoses (18) from two bulkhead fittings (19).
Install caps/plugs into all
Attach suspension chain (20) to affected bogie (11) as follows: