TM 9-2330-381-14
4-42. UPPER SUSPENSION ARM (CONT)
3.
Continue to drive upper bearing cup (26) into upper suspension arm (5) until firmly seated into casting of upper
suspension arm (5).
CAUTION
Use lower bearing cup removed during disassembly to help seat new bearing cup
or damage to new bearing cup may result.
4.
Aline lower bearing cup (25) with upper suspension arm (2) and, using a hammer, start seating lower bearing cup
(25).
CAUTION
Alternate driving points on lower bearing cup during installation or damage to
equipment may result.
5.
Aline existing bearing cup over new lower bearing cup (25) and, using a hammer, start driving bearing cup (25)
into upper suspension arm (5).
6.
Continue to drive lower bearing cup (25) into upper suspension arm (5) until firmly seated into casting of upper
suspension arm (5).
NOTE
Lower bearing cone and nonmetallic seal will not be reassembled in this
procedure. The suspension assembly must be reinstalled onto the semitrailer
platform and installation of the above stated parts will be installed during that
procedure (para. 4-40).
7.
Install lubrication fitting (22) to upper suspension arm (5).
INSTALLATION
1.
Using two people to maneuver overhead lifting device and upper suspension arm (5) and one person to
hold/support lower suspension arm (17), aline upper suspension arm (5) with lower suspension arm (17).
2.
Apply antiseize compound to inside bore of assembly joint for both upper and lower suspension arms (5 and 17)
and to exterior of shouldered shaft (21).
NOTE
The shouldered shaft is 0.063 inches (1.6 mm) larger at one end. It may be
necessary to measure both ends with accurate scale to determine which is the
smaller end.
3.
Insert smaller end of shouldered shaft (21) through larger bore in upper suspension arm (5) and into bore in lower
suspension arm (17) until shaft movement is stopped by lip at bearing oil seal.
4-198
