page 19
TD-24-T (5+20)
®
Maintenance
2.4
Running Gear
Suspension
The suspension on your trailer is a heavy duty, leaf spring, underslung type. An eye
is formed into the forward end of the longest leaf spring, while the aft end is free to float
against the wear pads of the hangers and rockers. Adjustable spring seats are em-
ployed to keep the axles in alignment.
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 unex-
pected 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 system ‘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 insure that undue move-
ment, which results in excessive suspension wear, does not occur.
During the first maintenance check, the trailers axle alignment should be examined
and adjusted. Alignment should also be checked following any maintenance or repair
procedure performed on the suspension.
Visually inspect the suspension system every three months or 25,000 miles for
signs of excess wear, elongation of bolt holes, and loosening of fasteners. Whenever
loose or replaced the fasteners in your suspension system should be torqued as de-
tailed below. It is important that you check all bolts and nuts to insure that the recom-
mended torque values are being maintained.
You cannot ascertain these torques values visually or by ‘feel’. USE A TORQUE
WRENCH!
M
A
I
N
T
E
N
A
N
C
E
Summary of Contents for TD-24-T(5+20)
Page 9: ...page 9 TD 24 T 5 20 Operation Spring Brake Chamber Rubber Seal Caging Key...
Page 59: ...page 59 TD 24 T 5 20 2 6 7 11 8 3 9 10 5 4 12 13 14 16 15 1 Parts P A R T S...
Page 61: ...page 61 TD 24 T 5 20 4 5 6 8 7 16 15 14 13 11 9 12 10 Parts P A R T S 3 2 1...
Page 63: ...page 63 TD 24 T 5 20 9 12 10 13 5 7 6 3 4 3 1 6 8 7 17 2 11 16 15 14 Parts P A R T S...
Page 67: ...page 67 TD 24 T 5 20 Parts P A R T S THIS PAGE LEFT BLANK INTENTIONALLY...
Page 69: ...page 69 TD 24 T 5 20 Parts P A R T S 5 6 6 7 8 9 10 12 11 4 3 1 2...
Page 71: ...page 71 TD 24 T 5 20 Junction Box shown for reference only Parts P A R T S 4 1 3 2 6 5...
Page 75: ...page 75 TD 24 T 5 20 Parts Detail shown on follow ing pages P A R T S 4 7 5 6 2 1 3 3...
Page 77: ...page 77 TD 24 T 5 20 Parts Hidden between ECU and tank P A R T S 15 5 15 20 19 18 4 21 15 6...
