1A
1A

6

9

5

6
11

INSTALLATION INSTRUCTIONS

Model 80LP/85LP Actuator for 8000/8500 lbs Capacity Trailer Brakes
IMPORTANT: READ AND
Set Screw Note:
The Set screw provided in theUNDERSTAND
bottom of the THE ENTIRE
actuator housing should be adjusted
to
INSTRUCTION
PROCEDURE
contact the flat provided on the
master
BEFORE USING YOUR BRAKES
cylinder casting then backed off 1/4 turn
AND ACTUATOR.
and locked in that adjusted position by
tightening the jam nut provided.
The Model 8­0LP/85LP works

1A & 2

1A & 3

8

10

8

7

9

8

1C

9

12

10

1B

1A

Set Screw - See Note
9

1A
1A
5

!

6

9

CAUTION

Brake laws sometimes are minimum standards and you may
wish to add additional brakes to your trailer. Read your tow
vehicle’s owner manual on towing capacity and other towing
recommendations before installing brakes or this actuator.

6
11

Set Screw Note:

This Actuator is completely assembled and ready to install.

The Set Screw provided in the bottom of the actuator housing should be adjusted
to contact the flat provided on the master cylinder casting then backed off 1/4
Set Screw Note:
turnThe
and
in that
adjusted
position by tightening the jam nut
provided.
Caution!
Set locked
screw provided
in the
bottom of the
actuator housing should be adjusted to
the flat provided on the master
#contact
TDE
Part #
DX Part #
cylinder casting then backed off 1/4 turn
and locked in that adjusted position by
tightening17044K
the jam nut provided.
1A
K68-528-00

Jam Nut

Bushing
by the “surge” or “push” of the
trailer toward the tow vehicle
NOTE: The jam nut has a lower profile, and is
thinner than a standard nut.
when braking. This automatically
Caution! Do not use pneumatics with
synchronizes the trailer brakes
medium or high torque ratings! Use only low
with the tow vehicle axle brakes.
torque pneumatics, (1/4" drive butterfly or
ratchet wrench recommended) Torque nylon
When the trailer pushes against
insert jam nut to 15-20 ft/lbs MAXIMUM.
the tow vehicle, the actuator
telescopes together and applies force to the master cylinder, supplying
hydraulic pressure to the brakes. The built in dampening shock absorber
retards the telescoping shock against the hitch ball.

1A & 4

1A

Caution!

Description

1.

Hydraulic brake lines should be installed on the trailer as
described in the installation manual supplied with the brakes.
Note: Some disc brakes require the use of flexible brake lines
at the connection point on the brake caliper. Follow brake
manufacturer instructions.

2.

Use a pressure type brake bleeder to bleed brakes, following
manufacturer’s instructions or manually bleed the brakes using
instructions on page 3.

3.

Check with your state motor vehicle department for laws
concerning minimum trailer brake requirements. Some states may
require brakes on all axles.

4.

Road test trailer a short distance to activate the actuator several
times.

Jam Nut

Disc Brake - Master Cylinder Repair Kit,
Bushing
Includes: all nuts,
cuffs, pins and clips

NS

11286

054-240-00

NOTE: The jam nut has a lower profile, and is
Disc Brake Solenoid
- used with disc
thinner than a standard nut.
Caution!
Do not use pneumatics with
brake
actuators

NS

10880K

007-636-00

Set Screw
nut Torque nylon
ratchetwith
wrenchlock
recommended)

2

48986A

068-572-00

Master Cylinder Cap with internal
bladder

3

48984

068-570-00

Cover - E-Stop

4

48988

068-558-00

Slide Cuff

5

70685

074-498-00

E-Stop Cable

6

11135

019-085-00

Pin Bullet .56 x 4.3” with zerc fitting

7

48989-3

068-692-00

Pin Bullet .62” x 4.3” without zerc fitting

8

10544

006-705-00

Jam Nut for 11135 & 48989-3

9

48753B

014-306-00

Bushing Short

10

48989-4

014-307-00

Bushing Long

11

50301

074-477-00

Safety Cable with stainless steel pin

12

48971

K74-564-00

Latch Kit

medium or high torque ratings! Use only low
torque pneumatics, (1/4" drive butterfly or
insert jam nut to 15-20 ft/lbs MAXIMUM.

©2019 Dexter Axle Company | www.dexteraxle.com

RATED CAPACITY:
Maximum Actuator Capacity:
80LP-8000 lbs. Gross Load, 800 lbs. Maximum Tongue Load
85LP-8500 lbs. Gross Load, 850 lbs. Maximum Tongue Load
The actual in-service rating is limited to that of the ball and hitch being
used or the trailer manufacturer’s GVWR shown on the certification
label, whichever is lower (Note: GVWR is the Gross Vehicle Weight Rating
which includes the trailer and the load weight as a Total Gross Weight).
-1-

059-Z01-08 2019.10| 08172

!

CAUTION

!

• A minimum of 5% tongue weight and a maximum 10% tongue
weight of the trailer GVWR must be located on the hitch ball. The
Trailer tongue should be parallel to the ground. Too much weight
can cause premature brake actuation and loss of control of the
towing vehicle. To little tongue weight can cause the trailer to
fishtail, resulting in loss of control of the tow vehicle and trailer
(total trailer weight GVWR includes weight of the trailer plus load).

AVOID sharp turns, which can cause the actuator to bind or
jackknife against the tow vehicle or cause a bend in the tongue.
Either can damage the actuator causing brake failure. AVOID
towing trailer across large bumps or dips that may over stress
the connection between the trailer and tow vehicle, as this could
result in damage to the actuator.