PRIMAAX
®
EX / PRIMAAX
®
for International Truck Vehicles
Preventive Maintenance
26
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PREVENTIVE MAINTENANCE –
PRIMAAX EX / PRIMAAX
■
Off highway and severe service
– Every 25,000 miles or six months, whichever comes first
■
100% On-highway
– Every 50,000 miles or 12 months, whichever comes first
1. Visually inspect suspension components with special attention to air springs and U-beam
Assembly (support beam assembly, cross tube, and integrated or detachable end cap).
Check for:
■
Proper suspension function
■
Any signs of unusual movement, loose or missing components
■
Any signs of abrasive or adverse contact with other components
■
Any damaged, bent or cracked parts
2.
PRIMAAX EX vehicles built AFTER March 2009
— DO NOT RE-TORQUE
the integrated end
cap, see Figure 6-1.
PRIMAAX vehicles built PRIOR TO March 2009
—
Check for proper torque values on the
detachable end cap connection fasteners, see Figure 6-4.
FIGURE
6-4
■
QUIK-ALIGN fasteners, see Figure 6-2.
■
Torque rod to top pad fasteners, see
Figure 6-2.
■
Clamp group fasteners (U-bolts), see
Figure 6-3.
3. Verify the ride height is within specification.
Ride height is measured from the bottom of the
frame rail to the centerline of the axle.
4. Verify that the lateral alignment of the drive axle
is within the vehicle manufacturer’s tolerances,
contact the vehicle manufacturer for the correct
lateral alignment instructions.
COMPONENT INSPECTION
IMPORTANT NOTE
Replace all worn or damaged parts.
■
Air spring
— Visually inspect the outer surface of the air spring for chafing, uneven wear,
cracks or any signs of component damage. Ensure that the upper bead plate is tight against
the underside of the frame. Check for any lateral slippage at the lower air spring bracket.
An
1
/
8
" of slippage in either direction is acceptable. Verify all mounting hardware have the
proper torque values maintained. See the Torque Specification Section of this publication
for recommended torque requirements.
■
Air supply (Pneumatic components)
— The air supply to the system plays a large role in
the air springs’ performance. Inspect, clean and replace, if necessary, any support products
to the air springs, valves, regulators and air lines. See Air Fitting Inspection in this section if
an air leak is suspected.
■
Clamp group
— Visually inspect for any loose or damaged fasteners. Verify the U-bolt lock-
nuts have the proper torque values maintained, see U-bolt Locknuts in this section.
■
Cross tube
— Visually inspect for cracks, damage, metal shavings, or looseness at the
beam connection.
■
End cap
(if equipped) — Visually inspect the end cap connection for signs of movement or
damage. Verify the support beam / cross tube connection bolts have the proper torque val-
ues maintained. See the Torque Specification Section of this publication for recommended
torque requirements.
Pro Gear and Transmission • 906 W. Gore St. Orlando, FL 32805 • 1 (877) 776-4600 / (407) 872-1901 • [email protected]
