bohm Stirling HB6 Planning guide

This document covers the following:
Tools required
Parts list
Assembly in
Maintenance
Contact details:
www.boehm- .com
www.boehm- -shop.com
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Stirling Engine HB6 Triangle-Sunlight and
HB6 Tea-Time Instructions

Tools you will need to
assemble your HB6
Triangle-Sunlight and HB6
Tea Time Temperature
Srling Engine:
Cross-point screwdriver,
Flat-bladed screwdriver,
Elasc band, coffee/tea
mug.

Bottom plate x1
75mm O ring x2
Top plate x1
Chamber
wall x1
Displacer
x1
Flywheel x1

Main pillar x1
Yoke x1
Crank x1
Piston x1
Cylinder x1
Gland
x1
Hub/axle x1

Conrod x2
13mm O ring x2
Conrod bush x2
Gland stem x1
Chamber pillar x7
7mm O ring x1
7mm ball-race
bearing x4
5mm ball-race
bearing x1
3mm O ring x1
Bearing cup x1

M2x6mm roundhead x2
M2x4mm roundhead x1
M3x6mm countersunk x2
M2x6mm countersunk x7
M2x4mm countersunk x3
Yoke pin x1
Crank weight x1
Bearing holder x1

Slide the gland onto the gland stem, hold the
stem between the thumb and forefinger of
your le hand and roll the gland along
the side of your right hand forefinger.
As you roll it, work the gland
along the whole length of
the stem.
This will remove any
parcles of dust
inside the gland.

Fit one 7mm O ring into
the groove in the boom
of the gland.

If you have solar (acrylic) plates you will need to remove the protective film from both
sides of the top plate now. Once you have removed the film try to handle the plate by its
edges, this will minimise fingerprints. Black (aluminium) plates do not have protective
film.
Locate the underside of the top plate.
The underside is the side with the countersinks on the two holes as shown in the diagram.

Screw the gland into the top side of the top plate and fully tighten, you might need to
wrap an elastic band around it for grip. Make sure that the O ring does not become
pinched or fall out of its groove. If you have trouble with the O ring falling out you can
turn the plate upside down and screw the gland in from underneath.

Fit one 13mm O ring into
the groove in the boom of
the cylinder.

Screw the cylinder into the top side of the top plate and fully tighten, you might need to
wrap an elastic band around it for grip. Make sure that the O ring does not become
pinched or fall out of its groove. If you have trouble with the O ring falling out you can
turn the plate upside down and screw the cylinder in from underneath.

Align the hole in the side of the main
pillar parallel with the front of the packing
tray and to the right as shown in the
diagram and push the pillar into the hole
in the tray.
This will hold it sll and upright while you
perform the next few assembly stages.

Insert one 13mm O ring into the
groove in the bottom
of the pillar.

Posion the top plate over the main
pillar, with the underside of the top
plate facing upwards. With the hole in
the side of the main pillar aligned
parallel to the front of the packing tray
and to the right, the two holes in the
plate must be aligned to the le, and
the cylinder should be towards the
back as shown in the diagram.
Align the two countersunk holes in the
plate with the two threaded holes in
the main pillar and insert two
M3x6mm countersunk screws a
couple of turns each.

Screw the screws in until they both lightly touch the top plate,
then fully tighten.

Remove the parally assembled engine from the packing tray.

Place the parally assembled
engine over the top of a
coffee mug.
This will hold it sll so that
you can use both hands to
perform the next few
assembly stages.

Insert seven chamber pillars into the seven small
holes in the plate; they should all be an easy fit. If
you have solar plates the heads of the pillars will sit
below
the surface, if you have aluminium plates the
heads will sit on the surface.

Posion the packing
tray over the parally
assembled engine and
align the hole in the
boom of the tray with
the main pillar, gland
and cylinder.