TECHNICAL
PROCEDURE
QUIK-DRAW® PNEUMATIC
PIN-PULL MECHANISM
SUBJECT: Operating, Maintenance and Retrofit
Procedures
LIT NO: L738
DATE: March 2005
REVISION: B
Van Applications (HK and HKA models)
Platform Applications (AAZ models)
TABLE OF CONTENTS
VAN APPLICATIONS (HK and HKA MODELS)
PLATFORM APPLICATIONS (AAZ MODELS)
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . .2
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . .9
OPERATING INSTRUCTIONS . . . . . . . . . . . . . . . . .2
OPERATING INSTRUCTIONS . . . . . . . . . . . . . . . . .9
Single Axle Slider Suspensions . . . . . . . . . . . .9
Tandem and Tridem Axle Slider Suspensions .10
MANUALLY OPERATING THE SLIDER PINS . . . . . . .2
One Person Technique . . . . . . . . . . . . . . . . . .3
Two Person Technique . . . . . . . . . . . . . . . . . .4
MANUALLY OPERATING THE SLIDER PINS . . . . . .10
ACTUATOR REMOVAL INSTRUCTIONS . . . . . . . . . .4
ACTUATOR REMOVAL INSTRUCTIONS . . . . . . . . .12
ACTUATOR INSTALLATION INSTRUCTIONS . . . . . . .5
ACTUATOR INSTALLATION INSTRUCTIONS . . . . . .12
CONTROL VALVE REMOVAL INSTRUCTIONS . . . . . .5
CONTROL VALVE REMOVAL INSTRUCTIONS . . . . .13
CONTROL VALVE INSTALLATION INSTRUCTIONS . .5
CONTROL VALVE INSTALLATION INSTRUCTIONS .13
QUIK-DRAW RETROFIT INSTALLATION . . . . . . . . . .6
QUIK-DRAW PLUMBING . . . . . . . . . . . . . . . . . .14
QUIK-DRAW® OPERATING, MAINTENANCE AND RETROFIT PROCEDURES
VAN APPLICATIONS (HK AND HKA
MODELS)
3. Remove the optional manual stop bar (if installed
on this trailer). Place it in the body rails just in
front of the desired slider location (if repositioning
the slider forward) or just behind the desired
slider location (if repositioning the slider rearward).
INTRODUCTION
QUIK-DRAW® is a pneumatic slider pin release
mechanism designed to make slider repositioning
fast and convenient. It is controlled by a single
push/pull control valve, located on a control panel at
the forward driver’s side of the slider assembly.
QUIK-DRAW is intended to operate only when the
trailer parking brakes are engaged. To retract the
slider pins with QUIK-DRAW, first ensure the trailer
parking brakes are engaged. Then pull the
QUIK-DRAW control valve out to its fully extended
position. This causes two linear air actuators to
inflate, thereby applying continuous retract force to
the slider pins. The QUIK-DRAW system will create up
to 900 pounds of force (if required) to retract bound
slider pins. If the trailer parking brakes are not
engaged, the QUIK-DRAW control valve will not stay
in the pulled out position and the actuators will not
inflate.
4. Pull the QUIK-DRAW control valve (figure 1) out
to its fully extended position. This pneumatically
retracts the slider pins.
5. Walk around the trailer inspecting each slider pin.
Ensure that each pin is fully retracted. If necessary,
the trailer can be gently rocked forward and then
backward to fully retract bound slider pins.
6. While keeping the trailer brakes applied,
reposition the slider by slowly moving the trailer
forward or backward to the desired position.
7. Apply vehicle parking brakes.
8. Push the QUIK-DRAW control valve all the way
in. This deflates the actuators, causing the slider
pin springs to force the slider pins outward into
the slider box and body rail holes. When aligned,
the slider pins will slip into the body rail holes,
securing the slider box to the body rails.
OPERATING INSTRUCTIONS
1. Clear and keep all bystanders away from the
tractor and trailer during QUIK-DRAW operation.
Chock the trailer wheels.
9. Walk around the trailer inspecting each slider pin.
Ensure that each pin has extended through the
slider box and body rail holes (the pins will only
extend approximately 1/8 inch through the body
rail). If necessary, the trailer can be gently rocked
forward and then backward to completely engage
misaligned slider pins.
2. On a level surface, apply the trailer parking
brakes.
10. Release vehicle parking brakes and remove trailer
wheel chocks.
WARNING: DO NOT DRIVE THE TRAILER
WITHOUT PUSHING THE QUIK-DRAW
CONTROL VALVE IN AND VERIFYING
THAT ALL FOUR SLIDER PINS HAVE
EXTENDED THROUGH THE SLIDER
BOX AND BODY RAIL HOLES.
MANUALLY OPERATING THE SLIDER PINS
In the unlikely event of a QUIK-DRAW system
malfunction, the slider pins can still be manually
operated. You never lose the ability to reposition the
slider with QUIK-DRAW.
Control valve
Figure 1. QUIK-DRAW control valve location
2
L738B
QUIK-DRAW® OPERATING, MAINTENANCE AND RETROFIT PROCEDURES
Just as QUIK-DRAW uses air actuators to retract
slider pins, it uses coil springs to extend them. These
coil springs apply a constant outward force on the
slider pins, causing them to stay fully extended and
in position through the slider box and in the body rail
holes. Because of these coil springs, the slider pins
are intended to remain engaged even if a QUIK-DRAW
actuator malfunction occurs. To manually operate the
slider pins, use one of the following procedures:
Pry until hole is exposed
inside of flange
Flange
ONE PERSON TECHNIQUE
1. Clear and keep all bystanders away from the
tractor and trailer during QUIK-DRAW operation.
Chock the trailer wheels and apply the trailer
parking brakes.
Figure 3. Retract slider pin until hole is exposed inside of flange
7. With all four slider pins retracted, remove the
optional manual stop bar (if installed on this
trailer). Place it in the body rails just in front of
the desired slider location (if repositioning the
slider forward) or just behind the desired slider
location (if repositioning the slider rearward).
2. Look under the trailer (inside the slider frame) and
locate both front and rear QUIK-DRAW air actuators.
3. At the end of one of the actuators, insert the
corner of a pry bar in the gap between the
actuator end and the slider pin (figure 2).
8. Reposition the slider by slowly moving the trailer
forward or backward to the desired position.
4. Using a block of wood (or some other device)
between the slider frame and the pry bar for
leverage, pry back the slider pin (figure 2). Pry
until the hole in the slider pin is exposed inside the
slider pin mounting flange (figure 3).
9. Remove all devices used to retract the slider pins.
10. Walk around the trailer inspecting each slider pin.
Ensure that each pin has extended through the
slider box and body rail holes (the pins will only
extend approximately 1/8 inch through the body
rail). If necessary, the trailer can be gently rocked
forward and then backward to completely engage
bound slider pins.
5. Insert a phillips head screwdriver or ¼ × 3-inch
bolt in the exposed hole in the retracted slider pin
(figure 4) to hold the slider pin in the retracted
position.
6. Repeat steps 3 through 5 on the other three slider
pins to hold them in the retracted position.
Pry bar
(use block of
wood as fulcrum)
Screwdriver
Pry against
actuator end
Wood
Figure 4. Manually retracted slider pin
Figure 2. Using a pry bar to retract the slider pin
L738B
3
QUIK-DRAW® OPERATING, MAINTENANCE AND RETROFIT PROCEDURES
11. Release trailer parking brakes and remove trailer
wheel chocks.
10. Release trailer parking brakes and remove trailer
wheel chocks.
WARNING: DO NOT DRIVE THE TRAILER
WITHOUT VERIFYING THAT ALL FOUR
SLIDER PINS HAVE EXTENDED
THROUGH THE SLIDER BOX AND
INTO THE BODY RAIL HOLES.
WARNING: DO NOT DRIVE THE TRAILER
WITHOUT VERIFYING THAT ALL FOUR
SLIDER PINS HAVE EXTENDED
THROUGH THE SLIDER BOX AND
INTO THE BODY RAIL HOLES.
TWO PERSON TECHNIQUE
1. Apply the trailer parking brakes and chock the wheels.
ACTUATOR REMOVAL INSTRUCTIONS
2. One person is positioned under the trailer, at the
end of one of the actuators.
1. Apply the trailer parking brakes.
To remove a QUIK-DRAW air actuator:
2. Chock the trailer wheels. Completely depressurize
trailer air system by opening air tank drain valve.
3. The other person is positioned outside the trailer,
at the same actuator end as the person
underneath, pushing the slider pin inward with a
long wooden handle or pipe. The slider pin must
be pushed in far enough to expose the hole in
the pin (figure 3) to the individual underneath the
trailer.
3. Disconnect air supply line(s) from fitting(s) on
end of actuator.
4. Remove cotter pin (figure 5).
5. Remove washer (figure 5).
4. The person under the trailer inserts a phillips
head screwdriver or ¼ × 3-inch bolt in the
exposed hole in the retracted slider pin.
6. Push clevis pin (figure 5) through slider pin and
air actuator end. Reach under the frame cross
member and pull clevis pin completely out
through access hole in frame cross member.
5. Repeat steps 2 through 4 on the other three pins.
WARNING: THE PERSON WORKING UNDER THE
TRAILER MUST NOW COME OUT
FROM UNDER THE TRAILER.
7. Repeat steps 4 through 6 at other end of
actuator.
8. Remove actuator.
6. With all four slider pins retracted, remove the
optional manual stop bar (if installed on this
trailer). Place it in the body rails just in front of
the desired slider location (if repositioning the
slider forward) or just behind the desired slider
location (if repositioning the slider rearward).
7. Reposition the slider by slowly moving the trailer
forward or backward to the desired position.
Clevis pin
8. Remove all devices used to retract the slider pins.
Washer
9. Walk around the trailer inspecting each slider pin.
Ensure that each pin has extended through the
slider box and body rail holes (the pins will only
extend approximately 1/8 inch through the body
rail). If necessary, the trailer can be gently rocked
forward and then backward to completely engage
misaligned slider pins.
Cotter pin
Figure 5. Air actuator fastening hardware
4
L738B
QUIK-DRAW® OPERATING, MAINTENANCE AND RETROFIT PROCEDURES
ACTUATOR INSTALLATION INSTRUCTIONS
FORWARD ACTUATOR
REAR ACTUATOR
1. Refer to figure 6 for proper actuator orientation.
Insert actuator end into slot in slider pin and
align holes.
2. Insert clevis pin in access hole in frame cross
member and through aligned slider pin/actuator
end holes.
Tee fitting
Straight fitting
3. Install washer.
4. Install cotter pin.
Figure 6. Actuator identification guide
5. Repeat steps 1 through 4 at other end of actuator.
CONTROL VALVE INSTALLATION
INSTRUCTIONS
6. Connect air supply line(s) to fitting on end of
actuator. Close drain valve on trailer air tank. Fill
the air tank and trailer air system.
1. Place control valve inside valve mounting bracket
and align mounting holes in control valve with
mounting holes in valve spacer and bracket.
7. Check air connections for leaks. Tighten as
necessary.
8. Release trailer parking brakes and remove trailer
wheel chocks.
2. Install control valve mounting bolts and locknuts.
Apply tightening torque of 5 to 8 ft. lbs. (7 to 11
N•m).
CONTROL VALVE REMOVAL INSTRUCTIONS
3. Connect air supply lines to control valve fittings.
To remove the QUIK-DRAW control valve:
4. Close drain valve on trailer air tank. Fill the air
tank and trailer air system. Check control valve
connections for air leaks. Tighten until air does
not leak from connections.
1. Chock the trailer wheels.
2. Apply the trailer parking brakes.
3. Completely depressurize the trailer air system by
opening air tank drain valve.
Control
valve
4. Mark, label or otherwise identify air supply lines
with corresponding fittings on QUIK-DRAW control
valve before disconnecting.
Disconnect
air supply
lines here
Locknuts
5. Disconnect air supply lines from fittings on
QUIK-DRAW control valve (figure 7).
6. Remove the two control valve mounting bolts and
locknuts (figure 7).
Mounting
bolts
7. Remove control valve.
Valve
spacer
Valve
mounting
bracket
Figure 7. Control valve details
L738B
5
QUIK-DRAW® OPERATING, MAINTENANCE AND RETROFIT PROCEDURES
Remove cotter pin, washer
and clevis pin
2. Remove the two handle nuts and handle bolts
from the handle assembly. Remove handle by
pulling through handle guide (figure 8).
Crank
arm
weldment
Handle
guide
3. Remove the forward locking pin link by removing
the cotter pin, washer and clevis pin from each
end of the locking pin link (figure 8).
4. Unfasten forward crank arm weldment by
removing cotter pin, washer and clevis pin
(figure 8) from slider pin.
Handle
Locking pin link
Remove handle
nuts and bolts
NOTE: Standard release mechanism shown.
Procedure for removing customer supplied
release mechanism is similar.
5. Repeat steps 3 and 4 with the rear locking pin link.
6. Cut the pipe weldment in half directly in front of
the rear crank arm weldment (figure 9).
Figure 8. Removing existing pin release mechanism
7. Remove the long forward section of pipe
weldment by pulling it out from the front of the
slider assembly (figure 9).
5. Verify proper QUIK-DRAW operation by fully
retracting and extending control valve.
8. Cut the pipe weldment in half again, this time
between the rear crank arm weldment and the
rear cross member (figure 9).
6. Release trailer parking brakes and remove trailer
wheel chocks.
QUIK-DRAW RETROFIT INSTALLATION —
VAN APPLICATIONS (HK AND HKA MODELS)
ONLY
9. Remove the short section of pipe weldment by
pulling it out from the rear of the slider assembly
(figure 9). Remove any remaining pieces of pipe
weldment.
The van application for QUIK-DRAW can be installed
on any Hendrickson K-2® Slider subframe. Use the
following procedure to remove the existing pin release
mechanism and replace it with QUIK-DRAW:
10. Install the new QUIK-DRAW control valve
mounting bracket over the existing handle guide
bracket. Bolt them together using the two hex
head bolts, torque prevailing flange nuts and two
of the 3/8-inch washers provided in the retrofit kit
(figure 10). Install the bolts into the cutout in the
handle guide so that the hex heads are on the
1. Apply the trailer parking brakes and chock the
trailer wheels.
Rear crank arm
weldment
First cut
Slide long
section of
pipe out
Rear cross member
Pipe weldment
Slide short section
of pipe out
Forward
Second cut
Figure 9. Removing pipe weldment
6
L738B
QUIK-DRAW® OPERATING, MAINTENANCE AND RETROFIT PROCEDURES
BEFORE
AFTER
Install hex
head bolts
here
Handle guide
bracket
Control valve
mounting bracket
Recommended
location for
L712 slider
system
operating
instructions
decal
Flange screws
Valve spacer
FRONT VIEW
Torque prevailing flange nuts
FRONT VIEW
Torque prevailing flange nut
.375" flat washer
Hex head bolt
TOP VIEW
TOP VIEW
Figure 10. Installing QUIK-DRAW control valve mounting bracket
Figure 11. Installing the QUIK-DRAW control valve
outside of the bracket and the torque prevailing
flange nuts and washers are on the inside (figure
10). Torque to 30 ft. lbs. (41 N•m).
14. Install air lines, beam clip assembly, air line
looms and grommets with reference to figures 13
and 14. When installing the longer (rear actuator)
air line, start at the rear actuator and work
forward. This will provide the small slack loop
desirable at the forward actuator. Tighten air line
fittings until air does not leak from connections.
11. Mount the QUIK-DRAW control valve to the valve
mounting bracket using the two flange screws,
valve spacer and ¼ - 20 torque prevailing flange
nuts provided in the retrofit kit (figure 11). Apply
tightening torque of 5 to 8 ft. lbs. (7 to 11
N•m).
15. Verify proper QUIK-DRAW operation by
repositioning the slider per the OPERATING
INSTRUCTIONS on page two.
12. If you want manual slider pin operation capability
(as described in the MANUALLY OPERATING THE
SLIDER PINS section), you can modify the
existing slider pins or order new ones.
16. After final painting, apply the supplied L712 slider
system operating instructions decal near the
QUIK-DRAW control valve (figure 11).
If you wish to modify the existing pins, remove
all four slider pins, drill a hole in each slider pin
as shown in figure 12, deburr both ends of this
new hole and reinstall the slider pins.
.380 diameter
+.015
-.005
If you wish to order new, pre-drilled slider pins,
contact Hendrickson and specify part number:
B-25262 for 13/8-inch diameter slider pins.
B-25261 for 15/8-inch diameter slider pins.
13. Install forward and rear actuators as instructed in
the ACTUATOR INSTALLATION INSTRUCTIONS
section of this manual. Note proper actuator
orientation (rear actuator has a straight fitting,
forward actuator has a tee fitting).
L738B
1.672"
(All dimensions in inches unless noted)
Figure 12. Slider pin hole drilling details
7
QUIK-DRAW® OPERATING, MAINTENANCE AND RETROFIT PROCEDURES
Grommet
Air line
loom
Short air line
Long air line (with slack loop)
Grommet
To supply (emergency)
line
Beam clip
assembly
To air reservoir
pressure
protection valve
Figure 13. Air line installation details for van applications (HK and HKA models)
To supply (emergency) gladhand
Forward linear air actuator
QUIK-DRAW control valve
Reservoir
Spring brake relay
Pressure protection
valve
Rear linear air actuator
Figure 14. QUIK-DRAW plumbing diagram for van applications (HK and HKA models)
8
L738B
QUIK-DRAW® OPERATING AND MAINTENANCE PROCEDURES
PLATFORM APPLICATIONS
(AAZ MODELS)
just in front of the desired slider location (if
repositioning the slider forward) or just behind
the desired slider location (if repositioning the
slider rearward). Proceed to the trailer axle that
will be repositioned.
INTRODUCTION
QUIK-DRAW® is a pneumatic slider pin release
mechanism designed to make slider repositioning
fast and convenient. It is controlled by a single
push/pull control valve, located on a control panel at
the forward driver’s side of the platform slider
assembly. QUIK-DRAW is intended to operate only
when the trailer parking brakes are engaged. To
retract the slider pins with QUIK-DRAW, first ensure
the trailer parking brakes are engaged. Then pull the
QUIK-DRAW control valve out to its fully extended
position. This causes an air actuator (standard Type
12 brake chamber) to apply a continuous retraction
force to the slider pins through the actuator linkage.
The QUIK-DRAW system will apply up to 400 pounds
of force to all four pins simultaneously, or up to
1600 pounds of force to a single pin (if required) to
retract bound slider pins. If the trailer parking brakes
are not engaged, the QUIK-DRAW control valve will
not stay in the pulled out position and the actuator
will not operate.
4. Pull the QUIK-DRAW control valve (figure 15) out
to its fully extended position. This pneumatically
retracts the slider pins.
5. Turn the Brake Lock & Deflate valve to the dump
position. Air exhausts from the axle air springs,
and the brakes on the axle are applied and
isolated from the rest of the braking system. This
prevents the brakes from being released in the
next step.
6. Return to the tractor and release the trailer
parking brakes. This releases the brakes on all
trailer axles except the axle being repositioned,
allowing the tractor/trailer to be moved
independently of the isolated axle.
7. Slowly move the trailer forward or backward. The
isolated axle remains stationary, allowing it to be
repositioned on the trailer.
OPERATING INSTRUCTIONS FOR
HENDRICKSON AIR KIT AKSS0001
8. Apply trailer parking brakes.
SINGLE AXLE SLIDER SUSPENSIONS
1. Clear and keep all bystanders away from the
tractor and trailer during QUIK-DRAW operation.
9. Return to the repositioned axle and check the
position of the slider. The goal is to align the
slider pins with the desired positioning holes in
the web of the trailer I-beam. Repeat steps 6, 7
and 8 if necessary.
2. On a level surface, apply the trailer parking brakes.
3. Remove the optional manual stop bar (if
installed on this trailer). Place it in the body rails
10. When the slider pins are aligned with the holes
in the web of the trailer I-beam, push the
QUIK-DRAW control valve all the way in.
11. Walk around the trailer inspecting each slider
pin. Ensure that each pin has extended through
the positioning holes in the web of the trailer
I-beams (the pins will extend approximately
½ inch through the I-beam). If necessary, repeat
steps 6, 7 and 8 to gently move the trailer so
misaligned slider pins can fully extend.
12. Turn the Brake Lock & Deflate valve to the
normal position. The axle air springs re-inflate,
and the brakes on the isolated axle are
reintegrated with the rest of the braking system,
allowing them to be released in the next step.
Control valve
Figure 15. QUIK-DRAW control valve location
L738B
9
QUIK-DRAW® OPERATING AND MAINTENANCE PROCEDURES
the web of the trailer I-beams. When aligned, the
slider pins will slip into the positioning holes,
securing the platform slider to the trailer I-beams.
WARNING: DO NOT OPERATE THE TRAILER
WITHOUT REINFLATING THE
SUSPENSION AND RELEASING THE
TRAILER PARKING BRAKES.
14. Move the tractor/trailer forward or backward.
Ensure that the repositioned axle moves with the
tractor/trailer.
8. Walk around the trailer inspecting each slider pin.
Ensure that each pin has extended through the
positioning holes in the web of the trailer I-beams
(the pins will extend approximately ½ inch
through the I-beam). If necessary, the trailer can
be gently rocked forward and then backward to
completely engage misaligned slider pins.
15. Apply the vehicle service brakes. Ensure that the
repositioned axle stops with the tractor/trailer.
9. Release trailer parking brakes and remove trailer
wheel chocks.
13. Return to the tractor and release the trailer
parking brakes.
WARNING: DO NOT DRIVE THE TRAILER
WITHOUT PUSHING THE QUIK-DRAW
CONTROL VALVE IN AND VERIFYING
THAT ALL FOUR SLIDER PINS HAVE
EXTENDED THROUGH THE
POSITIONING HOLES IN THE WEB OF
THE TRAILER I-BEAMS.
WARNING: DO NOT DRIVE THE TRAILER
WITHOUT VERIFYING THAT ALL FOUR
SLIDER PINS HAVE EXTENDED
THROUGH THE POSITIONING HOLES
IN THE WEB OF THE TRAILER IBEAMS.
TANDEM AND TRIDEM AXLE SLIDER SUSPENSIONS
1. Clear and keep all bystanders away from the
tractor and trailer during QUIK-DRAW operation.
Chock the trailer wheels.
MANUALLY OPERATING THE SLIDER PINS
In the unlikely event of a QUIK-DRAW system
malfunction, the slider pins can still be manually
operated. You never lose the ability to reposition the
slider with QUIK-DRAW.
2. On a level surface, apply the trailer parking
brakes.
Just as QUIK-DRAW uses an air actuator to retract
slider pins, it uses coil springs to extend them. These
coil springs apply a constant outward force on the
slider pins, causing them to stay fully extended and
in position through the positioning holes in the web
of the trailer I-beams. Because of these coil springs,
the slider pins are intended to remain engaged even if
an air actuator malfunction occurs.
3. Remove the optional manual stop bar (if installed
on this trailer). Place it in the body rails just in
front of the desired slider location (if repositioning
the slider forward) or just behind the desired
slider location (if repositioning the slider
rearward).
4. Pull the QUIK-DRAW control valve (figure 15) out
to its fully extended position. This pneumatically
retracts the slider pins.
To manually operate the slider pins, use the following
procedure:
5. Walk around the trailer inspecting each slider pin.
Ensure that each pin is fully retracted. If necessary,
the trailer can be gently rocked forward and then
backward to fully retract misaligned slider pins.
6. Reposition the slider by slowly moving the trailer
forward or backward to the desired position.
1. Begin with slider operation as described in the
SINGLE AXLE SLIDER SUSPENSIONS or TANDEM
AND TRIDEM AXLE SLIDER SUSPENSIONS
sections, but stop when the “pull the QUIK-DRAW
control valve out” step is reached. Instead of
pneumatically retracting the slider pins, use the
following three steps to manually retract them.
7. Push the QUIK-DRAW control valve all the way
in. This causes the slider pin springs to force the
slider pins outward into the positioning holes in
2. Look under the trailer (at the front of the platform
slider frame) and locate the hexagonal bolt head
on the end of the pipe weldment (figure 16).
10
L738B
QUIK-DRAW® OPERATING AND MAINTENANCE PROCEDURES
3. Using a 1½-inch wrench on the hexagonal bolt
head, rotate the pipe weldment counterclockwise
approximately 1/8 turn, or until the hole in the
slider pin is visible on the inboard side of the
slider pin cage assembly (figure 16). If the slider
pins are free to move, it will require
approximately 60 ft. lbs. (81 N•m) of torque to
rotate the pipe weldment. Hold the pipe weldment
in this rotated position for the next step.
Starting state
Hexagonal bolt head (not shown)
rotated clockwise
4. Insert a phillips head screwdriver or ¼ × 3-inch
bolt in the exposed hole in one of the retracted
slider pins (figure 17). This will hold all of the
slider pins in the retracted position because they
are all interconnected by the locking pin linkage.
5. Continue with slider operation as described in the
SINGLE AXLE SLIDER SUSPENSIONS or TANDEM
AND TRIDEM AXLE SLIDER SUSPENSIONS
sections, but stop when the “push the QUIKDRAW control valve in” step is reached. Instead
of pneumatically extending the slider pins, use
the following step to manually extend them.
Hole in slider pin must be
exposed on the inboard side
of the slider pin cage
assembly
6. Remove the screwdriver or other device used to
retract the slider pins.
Slider pin
7. Finish slider operation as described in the
SINGLE AXLE SLIDER SUSPENSIONS or TANDEM
AND TRIDEM AXLE SLIDER SUSPENSIONS
sections.
Hole
Slider pin
cage assembly
Hexagonal bolt head
Figure 17. Manually operating the slider pins
Figure 16. Hexagonal bolt head location
L738B
11
QUIK-DRAW® OPERATING AND MAINTENANCE PROCEDURES
ACTUATOR REMOVAL INSTRUCTIONS
To remove the QUIK-DRAW air actuator:
8. Remove actuator through opening in top of frame
crossmember.
1. Apply the trailer parking brakes.
ACTUATOR INSTALLATION INSTRUCTIONS
1. Inspect the new actuator to ensure that the
distance from the center of the clevis pin to the
mounting surface of the actuator is 5.93 (±0.03)
inches (figure 19). If not, loosen the jam nut
attaching the yoke to the push rod of the
actuator, and adjust to the proper length. Tighten
the jam nut to 20-30 ft. lbs. (27-41 N•m) of
torque.
2. Chock the trailer wheels. Completely depressurize
the trailer air system by opening air tank drain
valve.
3. Disconnect the air supply line from the fitting on
the bottom of the actuator.
4. Remove cotter pin and washer from clevis pin
attaching curbside front slider pin to actuator
linkage (figure 18).
2. Remove the air fitting from old actuator and
install into new one. Connection must be air
tight.
5. Push clevis pin through holes in slider pin and
actuator link. Reach under frame cross member
and pull clevis pin completely out through
access hole in frame cross member.
3. Remove the cotter pin and clevis pin from the
yoke on the push rod of the new actuator.
4. Remove the 11/16-inch nuts from the threaded
studs on the actuator.
6. Remove cotter pin and clevis pin attaching
actuator yoke to crank arm on actuator linkage
(figure 18).
5. Install the actuator through the opening in the top
of the front frame cross member, and onto the
mounting bracket inside the cross member. The
threaded studs on the mounting surface of the
actuator must pass through the holes in the
7. Using an 11/16-inch wrench, remove the two nuts
attaching the actuator to the mounting bracket
inside the frame cross member (figure 18).
Crank arm
Actuator yoke
Remove cotter pin,
washer and clevis
pin here
Remove cotter pin
and clevis pin here
Remove
Figure 18. Actuator removal details
12
L738B
QUIK-DRAW® OPERATING AND MAINTENANCE PROCEDURES
CONTROL VALVE REMOVAL INSTRUCTIONS
Clevis pin
Jam nut
To remove the QUIK-DRAW control valve:
Yoke
1. Chock the trailer wheels.
2. Apply the trailer parking brakes.
Push rod
3. Completely depressurize the trailer air system by
opening air tank drain valve.
Cotter pin
4. Mark, label or otherwise identify air supply lines
with corresponding fittings on QUIK-DRAW control
valve before disconnecting.
5.93" ± 0.03"
5. Disconnect air supply lines from fittings on
QUIK-DRAW control valve (figure 20).
Figure 19. Verifying actuator free length
6. Remove the two control valve mounting bolts and
locknuts (figure 20).
mounting bracket. The crank arm on the actuator
linkage must fit between the tangs of the actuator
yoke, and the holes in the yoke must line up with
the hole in the crank arm.
7. Remove control valve.
CONTROL VALVE INSTALLATION
INSTRUCTIONS
1. Place control valve inside valve mounting bracket
and align mounting holes in control valve with
mounting holes in valve spacer and bracket.
6. Reinstall the clevis pin in the actuator yoke,
ensuring that it passes through the hole in the
crank arm.
7. Reinstall the cotter pin to secure the clevis pin.
8. Reinstall the 11/16-inch nuts onto the threaded
studs of the actuator, and tighten to 32-38 ft. lbs.
(43-52 N•m) of torque.
Valve mounting bracket
9. Swing the previously-disconnected actuator link
upward, until the clevis pin hole lines up with the
holes in the curbside slider pin. The end of the
actuator link must fit into the slot in the slider pin.
10. Reinstall the clevis pin, washer, and cotter pin
previously removed.
11. Connect air supply line to fitting on bottom of
actuator. Close drain valve on trailer air tank. Fill
the air tank and trailer air system.
Control valve
Valve spacer
12. Check air connections for leaks. Tighten as
necessary.
13. Release trailer parking brakes and remove trailer
wheel chocks.
Figure 20. Control valve installation details
L738B
13
QUIK-DRAW® OPERATING AND MAINTENANCE PROCEDURES
2. Install control valve mounting bolts and locknuts.
Apply tightening torque of 5 to 8 ft. lbs. (7 to 11
N•m).
5. Verify proper QUIK-DRAW operation by fully
retracting and extending control valve.
6. Release trailer parking brakes and remove trailer
wheel chocks.
3. Connect air supply lines to fittings on control
valve.
QUIK-DRAW PLUMBING — PLATFORM
APPLICATIONS (AAZ MODELS) ONLY
4. Close drain valve on trailer air tank. Fill the air
tank and trailer air system. Check control valve
connections for air leaks. Tighten until air does
not leak from connections.
Install air lines and beam clip assemblies with
reference to figures 21 and 22.
Beam clip assembly
To supply (emergency)
line
To air reservoir
pressure protection
valve
Figure 21. Air line installation details for platform applications (AAZ models)
14
L738B
QUIK-DRAW® OPERATING AND MAINTENANCE PROCEDURES
To supply (emergency) gladhand
Air actuator
QUIK-DRAW control valve
Spring
brake
relay
Reservoir
Pressure
protection
valve
Figure 22. QUIK-DRAW plumbing diagram for platform applications (AAZ models)
L738B
15
www.hendrickson-intl.com
Trailer Suspension Systems
250 Chrysler Drive, Unit #3
Brampton, ON L6S 6B6 Canada
905.789.1030
Fax 905.789.1033
L738 Rev B 03-05
Trailer Suspension Systems
2070 Industrial Place SE
Canton, OH 44707-2600 USA
866.RIDEAIR (743.3247)
330.489.0045
Fax 800.696.4416
Trailer Suspension Systems
Ave. Rogelio González Caballero #850-B
Parque Industrial STIVA Aeropuerto
Apodaca, N.L., C.P. 66600 Mexico
(52) 81 8156 1300
Fax (52) 81 8156 1301
Information contained in this literature was accurate at the time of publication. Product changes may have been made after the copyright date that are not reflected.
© 2005 Hendrickson USA, L.L.C. (U.S. Rights) Hendrickson International Corporation (Rights Outside U.S.) All Rights Reserved