19
MAINTENANCE
Figure 7. Check Oil Level of Oil Lubricated Bearings
CAUTION
Do not allow brake drums to become
excessively worn or expensive repairs will be
required.
Figure 8. Lug Tightening Sequence
Suspension Alignment & Fastener Torque
The major source of costly repair bills on
suspensions is insufficient torque. After an initial
shakedown run of 1,000 miles and every 25,000 miles
thereafter, nuts on the suspension should be restored to
original torque specifications.
Torque Specifications
Transpro Reyco 21B
U-bolt hi nuts
3/4”
300
300
ft. lbs. ft. lbs.
7/8”
300
300
ft. lbs. ft. lbs.
Torque arm nuts
270
200
ft. lbs. ft. lbs.
Torque arm
55-60
80
clamp nuts
ft. lbs. ft. lbs.
Alignment Adjustment
To assure proper alignment of the suspension,
the following steps should be followed exactly:
1. Locate the trailer on a flat, smooth surface and
disconnect trailer brakes.
2. With the brakes disconnected, roll the trailer
forward and rearward a distance of approximately 10
feet to relieve any binding which might be caused by
turning or braking.
3. Remove the tractor from the trailer and level the
trailer body until it is parallel to the ground, using the
landing gear adjustment. Trailer should be leveled by
measuring from the frame to the ground at the front
and rear hanger.
4. Check to make sure that there is no interference
between the springs and the hanger brackets.
5. Tighten all torque arm bolt nuts and Ubolt nuts to
the torque specified above.
6. Remove hub caps from all four trailer wheels and
install axle extensions on each end of each axle.
7. Install a Bazooka-type kingpin extension and
center the sight level.
8. Measure from the kingpin extension to either end
of the front axle and make necessary adjustments.
9. With the front axle properly aligned, measure
between the axle extensions on either end of each axle
and make necessary adjustments.
10. Remove the axle extension, kingpin extension
and install hub caps.
11. Check the nuts on the adjustable torque arm tube
clamps to insure they are tightened to torque shown
above.
Figure 9. Checking Alignment
Note A. Steps one and two are very important in the
proper alignment of your suspension and should be done
before any attempt is made to align the suspension.
Note B. The slot in the adjustable torque arm should
be located in the down position and in alignment with
the open part of the clamp to insure proper clamping.
ST
EMC
O
HUB S
EA
L
ADD
FULL
FILL TO THIS LEVEL
1
2
3
4
5
S L
S R
L R
L L
+ 1/16
S R
S L
+ 1/16
1 6450076 BAZOOKA
2 6450077 AXLE EXTENSION SET
AXLE EXTENSION SET SHOWN IN PLACE
L R
L L
