Mechanical Suspension - Midland SIDE DUMP GRAVEL TRAILER Operator's Manual

5.2.12 SUSPENSION SYSTEM (cont'd)
5.2.12.2

MECHANICAL SUSPENSION

Two types of mechanical suspensions are available
on the trailer and must be specified and ordered from
the factory. Both work well and provide the customer
with a choice.
The two types of suspension for the tandem and
triaxle models are the Reyco 21B 8 leaf and the Hutch
9700 3 leaf. Both are designed to require minimal
service and maintenance on a trailer. However, these
service intervals and maintenance procedures must
be followed:
Service Intervals:
1. Follow the break-in procedure specified in
Section 4.3.
2. Visually inspect the suspension at the start of the
day or trip for bent, broken or loose components.
Always correct these conditions and perform a
complete check-out of the suspension before
placing the trailer back in service.
3. After each additional 25,000 miles (40,000 km), or
every 3 months, retorque all the fasteners to their
specified torque per the following table. Always
use an accurate torque wrench when retorquing
fasteners and attach to the nut.
4. 25,000 miles (40,000 km) or every 3 months,
inspect the following:
a. Check position of clamp if moveable clamps
used. Clamping legs must be centered over
slot in end tube.
b. Check fit and function of all bushings.
c. Check all hanger and hanger bracing welds
for cracks.
d. Check all other welds for signs of cracks or
distortion.
e. Check fit of springs in hangers and
equalizers.
f. Check equalizers for excessive wear at spring
ends.
g. Check suspension system alignment.
5. In addition to checking the alignment at the
recommended intervals, axle alignment should
be checked when any of the following conditions
occur:
a. Discovery of loose fasteners or components.
IMPORTANT
A loose fastener is defined as one whose
torque has dropped below its specified
level.
b. Discovery of elongated holes in a suspension
system component.
c. Whenever bushings are replaced.
REYCO 21B LEAF SPRING SUSPENSION
75