Eager Beaver 20 Ton XPT, Service Manual

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Warning
We strongly emphasize that each of the maintenance procedures that we will discuss have a significant safety
purpose. Failure to maintain proper torque values on each of the suspension components can result in a failure
of suspension components. Further, use of any visibly worn component can result in a failure. Any of these
failures can result in loss of vehicle control and personal injury or death. Safety is the number one concern
at Hutchens Industries. We urge you to follow the maintenance procedures set out in our video and in these
written instructions.
The first maintenance check should be performed after an initial break-in period of about 1,000 miles.A visual inspection of
all suspension components and attachment welds should be performed to reveal any obvious problems, such as cracks or
unexpected wear.
During this “walk-around” it is essential to also check the torque on all suspension fasteners. In the course of the initial “shake
down” period in which the components of the suspension “seat-in,” as much as 25% of the original clamp load on the bolted
joints can be lost.After the parts of the suspension have worked together for a very short period of time, re-torquing the bolts is
necessary to ensure that undue movement – which results in excessive suspension wear – does not occur.
During the first maintenance check, the trailer’s axle alignment should be examined and adjusted to comply with the Truck
Trailer Manufacturers Association (TTMA) Recommended Practice #71-05. Alignment should also be checked following any
maintenance or repair procedure performed on the suspension.Visual inspections and re-torquing are maintenance procedures
that are performed every four months throughout the life of the trailer.
Begin each inspection with a review of the Hutchens torque decal (shown below) for the appropriate torque values for each
suspension fastener. The oiled torque values in the first column are for new fasteners with lubricated threads.When you are
installing new components, we recommend you lubricate the threads and use the torque values in this column. For mainte-
nance checks on fasteners that have been in service, use the higher torque values in the dry thread column. It is important that
you check all bolts and nuts to ensure that the recommended torque values are being maintained.
You cannot rely on your visual inspection to detect loose fasteners.
USE A TORQUE WRENCH!
7700/9700 4-Spring Suspension Serie
Hutchens Torque Decal Part No. 16086-01
This decal should be installed on the side of the trailer in a visible location.
Decals can be obtained free of charge by contacting Hutchens Industries, Inc.
WARNING
SAFETY ALERT! (1) FOLLOW ALL TORQUE REQUIREMENTS. (2) DO NOT USE ANY COMPONENT WITH
VISIBLY WORN OR DAMAGED THREADS. FAILURE TO FOLLOW THESE SAFETY ALERTS CAN LEAD TO
LOSS OF VEHICLE CONTROL, PROPERTY DAMAGE, SERIOUS PERSONAL INJURY OR DEATH.
Hutchens Industries, Inc., P.O. Box 1427, Springfield, Missouri 65801-1427 Toll Free 1 (800) 654-8824
!
Hutchens Suspension Torque Requirements
9600-9700 Series (Decal Part Number 16086-01 Rev. J)
After an initial break in period, approximately 1000 miles, and at least every 4 months periodically thereafter,
ALL bolts and nuts should be checked to insure that recommended torque values are being maintained.
Oil torque values listed are for new fasteners with lubricated threads. It is recommended that new installations be
performed with oiled fasteners. For dry threads which have been in service, use the higher torque values which are noted
below.
OILED DRY
1 1/8-7 (9600/9700 Rocker Bolt) 590 lb-ft 790 lb-ft
1-14 or 1-8 (9700 Radius Rod Bolt) 540 lb-ft 720 lb-ft
7/8-14 (Axle U-Bolts & 9600 Radius Rod Bolt) 350 lb-ft 470 lb-ft
3/4-16 (Axle U-Bolts) 310 lb-ft 420 lb-ft
5/8-18 (Radius Rod Clamp Bolt) 130 lb-ft 170 lb-ft
5/8-18 (Spring Retainer Bolt) 35 lb-ft 50 lb-ft
®
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