17730-299
23
Preventive Maintenance
ULTIMAAX
®
for Fire and Rescue Vehicles
CROSS TUBE
The ULTIMAAX cross tube connects the two (2) equalizing beams through the equalizing beam’s
center bushings, see Figure 6-25 . The cross tube has clearance to float side-to-side in the center
bushings .
The length of the cross tube will allow side-to-side movement of approximately 2
3
⁄
8
" (60 mm) . For
this reason, the cross tube
may appear polished
or missing paint at each end where it enters
into the center bushings . This is normal . Also, the cross tube will rattle in straight position which
is acceptable .
FIGURE 6-25
IMPROPER JACKING METHODS CAN CAUSE STRUCTURAL DAMAGE WHICH CAN CAUSE ADVERSE
VEHICLE HANDLING, PROPERTY DAMAGE OR SEVERE PERSONAL INJURY AND WILL VOID
HENDRICKSON’S WARRANTY .
■
DO NOT USE THE SUSPENSION CROSS TUBE AS A JACKING POINT, REFER TO VEHICLE MANUFAC-
TURER FOR PROPER JACKING INSTRUCTIONS .
■
ACCEPTABLE LIFTING POINTS FOR A VEHICLE AT THE RATED LOAD INCLUDE BUT NOT LIMITED
TO: THE AXLE, EQUALIZING BEAM, AND THE VEHICLE FRAME RAIL . REFER TO THE VEHICLE
MANUFACTURER FOR PROPER JACKING INSTRUCTIONS .
DO NOT
grease or lubricate the cross tube or the center bushing and
DO NOT
use the cross tube
as a jacking point, see Figure 6-25 .
VISUAL INSPECTION
■
Visually inspect the overall condition of the cross tube for dents, dings, or bent condition,
replace as necessary .
NOTE
A bent cross tube may cause misalignment of the axles, which may cause abnormal tire wear .
■
Use a straight edge to inspect the straightness of the cross tube, replace as necessary .
Equalizing
Beam
Center Bushing
grease
DO NOT
Cross Tube
grease or
use as a jacking point
DO NOT
63K Shown
ULTIMAAX