4-40. SUSPENSION ASSEMBLY/BOGIE (CONT)
Extreme caution must be used to make sure that the upper suspension arm does
not make contact with the platform spindle or damage to equipment may result.
Continue to pry upward on crowbar (29) and raise platform until upper suspension arm (22) is separated and clear
of platform spindle (6). Using isolation valve handle extension, close suspension isolation valves at four corners
Remove two hydraulic hoses (14) from drain pan and wrap hydraulic hoses and two pneumatic hoses (18) around
upper suspension arm (22).
Personnel moving bogie out from under platform must not, at any time, use caging
bolt as a holding device. The caging bolt is held in place by pressure from spring
in brake chamber. If caging bolt becomes unseated from inside brake chamber,
injury to personnel may result.
With two people positioned at each set of dual tires on bogie (11) and a third person guiding/operating overhead
lifting device (26), slowly roll bogie (11) out from under platform.
Alternate driving points on inner race of lower suspension bearing cone or damage
to equipment may result.
Using a hammer and brass drift, drive lower bearing cone (30) and oil seal (31) from upper suspension arm (22).
Discard oil seal.
Remove suspension chain (20).
Using wiping rags, clean all grease from inside of upper suspension arm cavity, platform spindle, and associated
parts. Clean all parts using degreaser tank with cleaning solvent. Inspect upper suspension arm, platform
spindle, upper and lower bearing cups, lower bearing cone, spacer, and attaching hardware for cracks, scoring,
gouges, bends, and corrosion. Replace all defective parts.
Inspect suspension arm upper bearing cone, still on platform spindle, for defects.
If defective, notify DS