Trail Master Suspension TM413N FORD SUPER DUTY F-350 4WD DIESEL SUSPENSION LIFT KIT - Manual (Page 11)

TM411N, TM412N,
TM413N, TM414N
Revised
7.11.13
11
Rear Installation:
1. Block the front tires and raise the rear of the
vehicle. Support the frame with jack stands
forward of the rear springs.
2. Remove the wheels and tires.
3. Unscrew the rear axle vent tube to separate
the rear brake line bracket from the rear axle.
4. Remove the shocks on both sides of the vehi-
cle. It may be necessary that you slightly
raise the axle to unload the shocks for re-
moval.
5. On the driver side, unbolt the emergency
brake line bracket from the upper spring
plate. Save hardware for reuse.
6. If your vehicle is equipped with factory
sway bar, unbolt it from the end links. Un-
bolt and remove the end links from the vehi-
cle.
7. Support the rear axle with a floor jack and
remove the U-bolts on the driver side.
Slightly loosen the U-bolts on the passenger
side.
8. Lower the rear axle and remove the factory
block.
NOTE: Be sure not to over extend the
rear brake line and rear axle vent line.
9. While supporting the rear leaf spring, remove
the factory spring mounting bolts and remove
the leaf spring from the driver side only at
this time.
10. Disassemble leaf spring and insert the add-a-
leaves (13150-1 and 13150-2).
NOTE: The add-a-leaves will be added
onto the bottom of the factory spring pack, pro-
gressively according to length. Do not install
the add-a-leaves below the factory overload
spring if the vehicle is equipped with one. See
ILLUSTRATION 10.
11. Using the C-clamps, bolt the leaf pack back
together using the supplied center bolt with
the head of the bolts facing down and the nut
on the top. Reinstall the spring pack to the
hangers using the OE hardware. Do not
torque at this time.
NOTE: DO NOT trim the excess center
bolt on the driver side. The extra threads
will be needed to attach the OE emergency
brake line bracket.
12. Install the supplied lift block (F-250: 95-
407SD drvr and 95-406SD pass ) or (F-350: 95-
556SD drvr and 95-557SD pass) depending on
application. See the side note for proper ap-
plications. Make sure the pin fits into the
hole on the spring perch. Use your floor jack
to raise the axle to the spring making sure the
pin on the factory leaf spring assembly fits
into the hole on the lift block. Secure the
assembly with the 5/8” U-bolts (F-250: 13-
90540 or F-350 13-90560 ) 5/8” hi-nuts (PN
20-65471) and washers supplied. Do not
torque the hi-nuts at this time. See ILLUS-
TRATION 10.
NOTE: Make sure the block sits flush
on the axle perch.
13. Repeat the installation on the other side of
the vehicle.
14. On driver side, carefully bend down the
emergency brake line bracket that secures the
line to the frame and bolt the emergency
brake line bracket back to the spring pack
center bolt using the supplied 10mm-1.5 nut.
15. Install your new Trailmaster shocks
(TM75790W). Torque the upper mounting
hardware to 46 ft. lbs. and the lower mount-
ing hardware to 66 ft. lbs. Use thread locker
on these bolts.
APPLICATIONS:
1. FOR F-250 MODELS, INSTALL
THE ADD-A-LEAVES (13150-1 AND
13150-2) AND LIFT BLOCK 95-
407SD DRVR AND 95-406SD PASS.
2. FOR F-350 MODELS, INSTALL
THE ADD-A-LEAVES (13150-1 AND
13150-2) AND LIFT BLOCKS 95-
556SD DRVR AND 95-557SD PASS.