Haldex L31189 Procedimientos De Instalación

Installation
Guide
L31189
Note: Configuration of anchor bracket and brake adjuster housing may vary, depending upon axle. Refer to typical applications on the following page.
Step 1
Note: Block wheels to prevent vehicle from rolling. Ensure system tank
pressure is above 100 PSI.
■ Check that the push rod is fully
retracted; apply air to release spring
brake. If air is not available, spring
brake must be manually caged back.
■ Install anchor bracket loosely as
illustrated. (Figure 1)
■ Some strap brackets have two
mounting holes. Proper mounting
location is determined by the length
of the adjuster arm. 5" and 5-1/2"
adjuster arm lengths utilize the
shorter hole location, while 6" and
6-1/2" length adjusters utilize the
longer hole locations.
■ Do not tighten anchor bracket
fasteners at this time.
■ Apply "Anti-Seize" type lubricant to camshaft splines.
Step 3
■ Rotate the control arm away from the
adjusting hex toward the air chamber,
until it comes to a definite internal
stop. (Figure 3)
■ Most adjusters will be equipped with
an "Installation Indicator" as a visual
indicator to assure that the control
are position has been properly set.
Indicator must fall within the slot for
proper installation with brakes fully
released. (Figure 4)
■ If the control arm position is
wrong, improper adjustment
and/or inadequate lining to
drum clearance will occur.
(Figure 5)
■ Tighten all anchor
bracket fasteners (make
sure the control arm
does not move from its
position while tightening
fasteners).
Warning: Haldex strongly recommends routine visual checks be performed at EACH maintenance service interval. Foundation brake operational checks utilizing CVSA level 1 applied stroke
criteria should always be utilized. Manual adjustment of automatic adjusters can disguise hidden problems within the foundation brake. Brake components such as s-cams, bushings, return
springs, actuators, drums and adjuster installation MUST be within manufacturer's specifications. Adjuster control arms, wear bushings or attaching hardware that demonstrate visual damage,
or which fail the operational checks, MUST be replaced immediately. Automatic Adjusters should NEVER be operated as manual adjusters except as may be necessary to get the vehicle off the
road for service.
For Service Manual L30036- See www.hbsna.com
Rev 6/07
Anchor Bracket
Figure 1
Figure 3
X
I NCORRECT
Correct
(Brakes released)
(Brakes released)
Figure 5
Figure 4
ABA Installation
Instructions
Step 2
■ Install the brake adjuster onto the camshaft with the adjusting
hex pointing away from the brake chamber. (Figure 2)
■ Secure the brake adjuster on the camshaft. Use at least one
inner washer and enough outer washers to allow no more
than .060 movement of adjuster on
camshaft. (Per TMC recommended
practice RP609-A.)
Note: Do NOT pull push rod out
to meet the brake adjuster.
■ Rotate the 7/16" adjusting hex nut
CLOCKWISE until the clevis hole
lines up with the brake adjuster
arm hole.
■ Apply "Anti-Seize" type lubricant to
clevis pin. Install and secure with
cotter pin.
Step 4
■ The adjuster must be manually adjusted at this time.
■ Rotate the adjusting hex clockwise until the lining lightly
contacts the drum.
■ Then back-off the adjuster by turning the adjusting hex
counter-clockwise 1/2 of a turn. (Figure 6)
■ A minimum of 13 ft. lbs. is
necessary to overcome the
internal clutch. A ratcheting
sound will be present.
■ Do NOT use an impact
wrench or damage to
internal mechanism will
occur!
■ FINAL INSPECTION. With
brakes fully released, check that
the "Installation Indicator" is
within the slotted area. IF NOT,
REPEAT Step 3.
Note: To ensure proper fit and function, always replace both adjuster
and mounting bracket as a set.
Figure 2
Figure 6
➮
Continued on reverse side