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Pre-Operation
5. Pre-Operation
1.
With the vehicle on a level surface, build air pressure
above 70 psig (4.83 bars).
2.
Shut off the vehicle and visually check all air control
system fittings for air leaks by applying a soapy water
solution and checking for bubbles at all air connections
and fittings. Check the air springs for equal firmness.
3.
With the vehicle loaded at design capacity, check that
there is a 1.5" (38 mm) minimum clearance around the
air springs, 2.5" (64 mm) when unloaded (Figure 4).
NOTE: At certain axle pinion angles the distance from the
spring to the shock absorber will be less than 1.5"
(38 mm) and is permissible.
4.
Verify that the upper and lower air spring hardware
(Figure 4) are torqued according to the specifications
listed in Section 16 and/or OEM specifications.
NOTE: When re-torquing, the nut should be loosened
a couple of turns and then torqued to the
recommended specification.
5.
Check the shock absorbers for proper installation and
that the .75" upper and lower shock absorber hardware
(Figure 4) are torqued according to the specifications
listed in Section 16.
6.
Check that the 1.13" (29 mm) pivot connection bolt
(Figure 5) is torqued according to the specifications
listed in Section 16.
NOTE: All pivot connection bolts supplied by SAF-HOLLAND
have a pre-applied coating (silver in color) which
provides thread lubrication throughout the
expected service life of the bolts.
7.
Check for proper installation of spacer washers at the
pivot connection and at the axle connection (Figure 5).
8.
Verify that the axle adapter connection hardware
(Figure 5) are torqued according to the specifications
listed in Section 16.
NOTE: Different frame widths require various spacer
washer placements at the pivot connection. Refer
to Section 11 (Figure 31) for further information.
9.
Verify that all frame fasteners (Figure 6) are torqued
according to the chassis builder OEM's recommended
torque specifications.
NOTE: Hardware attaching components to the vehicle
frame are typically the responsibility of the vehicle
OEM. Refer to OEM for torque, grade and size.
12
Figure 4
UPPER AND
LOWER SHOCK
ABSORBER HARDWARE
Figure 5
PIVOT
®
CONNECTION BOLT
Figure 6
XL-PS10452MM-en-US Rev E · 2024-05-23 · Amendments and Errors Reserved · © SAF-HOLLAND, Inc., SAF-HOLLAND, HOLLAND,
SAF,and logos are trademarks of SAF-HOLLAND S.A., SAF-HOLLAND GmbH, and SAF-HOLLAND, Inc.
SPACER WASHERS
INSIDE FRAME BRACKET
(NOT ILLUSTRATD)
AXLE ADAPTER
CONNECTION BOLTS
FRAME
FASTENING
HARDWARE
2" (51 mm)
MINIMUM
CLEARANCE
UPPER AND LOWER
AIR SPRING HARDWARE
AXLE ADAPTER
SPACER WASHER
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