How to renew the vacuum lines on the auto cruise valve to the accumulator

Step-by-step tutorials on how to maintain and fix your GL1500
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Location: mells , England, United Kingdom
Motorcycle: Honda Goldwing gl 1989

How to renew the vacuum lines on the auto cruise valve to the accumulator

Post by wingdings »

Hi - Everyone - Here is a quick how to article on how to renew the blue vacuum hoses from the auto cruise valve to the accumulator on a Honda Goldwing GL1500k 1989 model USA spec Ohio factory built.

To use this how to article it is assumed that you have already removed both lower side panels and top shelter from the bike and have removed the carbs from the bike also and removed the black rubber matting to gain access to those vacuum hoses under the matting that on my wing were in a very bad state indeed with cracks on the bends and deformed hoses.

The vacuum hoses on this part of the system are black with a blue neck band and are numbered according where they are on the vacuum diagram (see diagram below).

TOOLS: - Socket set - green garden wire - Flat blade screwdriver.

Materials: - Honda-OME -Vacuum lines (if you can find them??) or Samco silicon vacuum lines colour blue.

1) Start by removing blue banded hose number 3 from the top of the auto cruise control unit.

2) Next move down to the righthand side of the bike too where the right-hand manifold is there should be two vacuum
intake ports one on the top and one just below. The one that you want is the top one disconnect the blue vacuum tube
1 from the manifold intake port, it's the one that wraps around the intake manifold.

3) Next to gain better access to the three-way one-way valve you will need to remove both spark plug caps 3 and 5 from
the right-side spark plug bank cover the holes with kitchen paper to keep the dirt out and place the leads out of the
way of the work area.

4) Next disconnect the vacuum tube to the right-hand side of the blue banded tube 1 This should have a yellow band on it.
(See picture above) and be numbered vacuum 2

5) Next you will need to remove the manifold blot to remove the hose stay clip this will give you better access to the three
way one-way valve. ( see picture below).

6) Next you can now see the three-way one-way valve however before you can pull this out to remove the two other
connecting vacuum hoses which are blue hoses 3 and 4. Number 4 vacuum hose goes straight to the accumulator this is
situated just to the left of right-side radiator fan tube 4 connects from the bottom to this and needs to be
disconnected from the accumulator. This when done will give you a little more play in the line when it comes to
removing the three-way one-way valve, however be careful when you are pulling the valve out and keep an eye on
vacuum hose 4 when pulling out the valve you don't want to lose the end of the hose it's a nightmare trying to find it
again, as its rooted right under the manifold. YOU HAVE BEEN WARNED!!!.
(see picture below)

7) Next - With all stripping now done and presuming you now have enough slack in all three vacuum lines slowly pull out
the three-way - one-way valve feeding vacuum tubes 1 and 3 towards you keeping a very mindful eye on vacuum tube 4
you don't want to lose the end of this at all.

8) Next with the three-way one-way valve now pulled out its time to start rooting the new vacuum lines to this valve take
each vacuum line in turn starting with vacuum line 3 from the auto cruise valve either push the old disconnected hose
to one side and root the new one beside it. Or take the old line completely out after disconnecting from the three-way
one-way valve at the bottom using a flat bladed screwdriver to ease the rubber off the valve.

Top tip here - I found it easy if you route the number 3 vacuum line from the auto cruise valve to about halfway across
and though the tubing underneath the carbs and the rubber matting, then bring up the garden wire via the three-way
one-way valve to meet in the middle. Then attach the green garden wire to the hose after first bending the wire back on

it's self then pushing the wire up the tube end then first binding wire end with insulation tape and then continue on
blinding and wrapping this on to the vacuum hose end and then pulling both the wire and vacuum tube 3 through to the
three- way one-way valve and wrapping this on to the vacuum hose end and then pulling both the wire and vacuum tube
3 through to the three- way one-way valve.

Here is vacuum hose 3 connected and vacuum hose 1

Here is a picture of the whole thing put back together.

Assembly is done in reverse to disassembly ...

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