AL-KO IQ7 - Hydraulic Connection; Bleeding Procedure

HYDRAULIC CONNECTION
Connect the hydraulic brake line from the brake system on the towed vehicle to the brake
port on the AL-KO iQ7 actuator unit using a 3/8” UNF Brass Long Series Tube Nut.
Carefully ll the brake uid reservoir by removing the ller cap. Always use new brake uid.
Never attempt to reuse brake uid. The reservoir is full when the uid reaches the bottom of
the reservoir neck (the top of the sight glass). Do not over ll the reservoir. Be careful not
to spill brake uid between the reservoir and the front cover. The brake uid level must
never fall below the ‘minimum’ line indicated on the sight glass.
Bleeding
Bleeding instructions using AL-KO iQ7 Pressure Bleed Gun
1. Fill reservoir with clean Dot 4 brake uid to just
below the top of the sight glass.
2. Place the pressure bleed gun (available from AL-KO
p/n 350045) socket gently over the neck of the
reservoir applying gentle pressure to locate the bleed
socket O Ring in
3. Do not push on with excessive force or damage
may be caused to the reservoir or the O ring on the
pressure bleed gun socket. Rub a small amount of
brake uid around the inside of the reservoir neck to
assist tting. Screw the cap fully closed.4. Attach
the bleed gun to the actuator uid reservoir (as
shown in diagram 1.) and place the other end in a
bottle of new brake uid
4. Attach the bleed gun to the actuator uid reservoir
(as shown in diagram 1.) and place the other end in
a bottle of new brake uid.
5. Open the bleed screw on the trailer brakes (start with the furthest calliper/brake) at
least one full turn. Place a clear exible hose over the bleed screw and immerse the
other end into a container partially lled with brake uid.
6. Squeeze the pressure bleed gun repeatedly (not too fast or cavitation may occur)
ensuring that the bulk brake uid tank and the reservoir do not run out of brake uid
or air will enter the hydraulic system. At no stage let the uid level in the reservoir fall
below the minimum uid level indicator.
3
Actuator
Actuator
Bow Post
Mounting bush
Rubber grommet
Over tightened Correct
Brake Fluid
Reservoir
Master
Cylinder
Port
Pressure
Dump Valve
100mm
140mm 168mm
281mm
Diameter: 6.0mm of 1/4”
Maximum Fluid Level
Minimum Fluid Level
Diagram 1.
Attaching the
bleed gun to
the actuator.
Bleeding
(Diagram 2)
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