Component Inspection - ProGear Hendrickson HN FR Series Service Manual

HN ® FR Series
SAFETY REMINDER
All applicable warnings and cautions should be read carefully to help prevent personal injury
and to assure that proper methods are used. Improper maintenance, service or repair may
damage the vehicle, cause personal injury, render the vehicle unsafe in operation, or void
manufacturer's warranty.
Failure to follow the applicable safety precautions can result in personal injury and/or property
damage. Carefully read and understand all safety related information within the applicable
Hendrickson publications, on all decals and those provided by the vehicle manufacturer before
operating the vehicle, or conducting any maintenance, service or repair.
OVERLOADED SUSPENSIONS CAN CAUSE COMPONENT FAILURE, LOSS OF VEHICLE CONTROL,
SEVERE PERSONAL INJURY OR DEATH.
• DO NOT EXCEED SUSPENSION CAPACITY RATINGS.
• DO NOT OPERATE AUXILIARY LIFT AXLES OR OTHER LOAD TRANSFERRING DEVICES IN ANY

COMPONENT INSPECTION

The following inspection should be performed at recommended maintenance intervals. Visually
inspect all parts of the suspension for signs of wear, damage or movement. Look for bent or
cracked parts. Replace all worn or damaged parts.
IMPORTANT NOTE Replace all worn or damaged parts.
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NOTE Hendrickson recommends the use of Grade 8 bolts, Grade C locknuts and hardened washers for
all suspension component attachments.
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See vehicle manufacturer's applicable publications for other preventive maintenance requirements.
Preventive Maintenance
Pro Gear and Transmission • 906 W. Gore St. Orlando, FL 32805 • 1 (877) 776-4600 / (407) 872-1901 • parts@eprogear.com
THAT CAN OVERLOAD THE SUSPENSION.
Auxiliary spring and Bolster spring — See Auxiliary Spring Assembly and Bolster Springs
in this section.
Equalizing beam assembly — Check the overall condition of the equalizing beam for
cracks, dents, dings, or other damage on the outer edges of the beam. Check the beam end
connections every six months for tearing or extreme bulging. Check for any metal-to-metal
contact in the bushed joints. Replace all worn or damaged parts.
Fasteners — All fasteners must be inspected at pre-delivery, after the first month, and every
twelve months thereafter. Look for any loose or damaged fasteners on the entire suspen-
sion. Make sure all fasteners are tightened to a torque value within the specified torque
range. See Torque Specification Section of this publication for Hendrickson recommended
torque requirements. Use a calibrated torque wrench to check torque in the tightening
direction. As soon as the fastener starts to move, record the torque. Correct the torque if
necessary. Replace any worn or damaged fasteners.
Saddle assembly — Check all attaching fasteners for proper torque. Visually inspect the
saddle for signs of movement on the frame rail or damage and welds for cracks. Inspect the
area around the saddle gussets for cracks.
Torque rods — All torque rods should be inspected every six months. Check for wear, dam-
age and proper function. Visually inspect for signs of unusual movement, loose, or missing
fasteners. The torque rods must be connected and in good working condition when operat-
ing the vehicle.
Vee Bracket — Raise the vehicle frame and visually inspect the Vee bracket for wear or
damage. Look for excessive wear or cracks on the Vee bracket's auxiliary spring contact
surface. Replace all worn or damaged parts.
Wear and Damage — Inspect all parts of the suspension for wear and damage. Look for
bent or cracked parts. Replace all worn or damaged parts.
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WAY
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