Preventive Maintenance
18
17730-299
ULTIMAAX
®
for Fire and Rescue Vehicles
SERVICE HINT
An equalizing beam end connection that is visibly cleaner than the other connections may indi-
cate a loose connection .
2 . If bushing movement or looseness is detected in the equalizing beam end hub,
DO NOT
oper-
ate vehicle . Replace the equalizing beam end bushings and all connecting parts . Refer to the
Component Replacement Section of this publication .
3 . Check and record torque values, see Figure 6-9 . Correct torque values as required making
sure all fasteners are tightened to 125 foot 90° rotation or 700 ± 50 foot pounds
torque .
FIGURE 6-9
BAR PIN END BUSHINGS
FIGURE 6-10
VISUAL INSPECTION
An indication that the bar pin end bushing requires
replacement is when one or more of the following
conditions apply:
■
If the contact area, see Figure 6-10 (the flat face
area where bar pin contacts the axle bracket)
reveal signs of excessive wear . Replace if bar pin
thickness measures less than 1
7
⁄
8
" (47 .59 mm) .
■
If bar pin bolt holes bores reveal signs of elonga-
tion or wear, see Figure 6-10 .
BAR PIN SHIMS
An indication that the bar pin shims require
replacement is when one or more of the following
conditions apply:
■
Visual inspection of contact area on the shim reveals signs of excessive wear .
■
The thickness of any single leg on the shim, is less than the measurement shown in
Figure 6-11, replacement of bar pin shim is required .
FIGURE 6-11
Original
Thickness
of Shim Leg
Minimum
Thickness
Required
Part Number
1
⁄
8
" (3 .2 mm)
0 .123" (3 .1 mm)
50131-000
3
⁄
16
" (4 .8 mm) 0 .186" (4 .7 mm)
50130-000
¼" (6 .4 mm)
0 .248" (6 .3 mm)
50131-000
3
⁄
8
" (9 .5 mm)
0 .371" (9 .4 mm)
57026-000
Equalizing Beam
Adapter Style
End Bushing
Beam End Adapter
Beam End Shaft
1 / " Slotted Nut
7
8
Beam End Adapter
1 / " Slotted Nut
Tightening Torque
125 ft. lbs. (170 Nm)
+ 90° rotation or
700 ± 50 ft. lbs. (949 ± 68 Nm)
7
8
Cotter Pin
63K Shown
ULTIMAAX
Bar Pin
If bar pin measurement is
less than
1.874" (47.59 mm)
, replacement is required.
1.874"
(47.59 mm)
Confinement
Washer
Bolt Hole
Bore
Contact Area
Shim Type Bar Pin End Bushing
