Creative Engineering ROCK-A-FIRE EXPLOSION - Page 86

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The

Chest

B.

To

replace

the

upper

(Head

Right)

or

lower

(Head

Left)

Actuation

lever:

(See

Drawings

Pages

3-054

and

3-055)

1.

Detach

the

cylinder

from

the

Actuation

lever

and

loosen

the

set

screws.

Align

the

hole

through

the

neck

shaft

and

Actuation

Lever,

then

tap

out

the

broken

Roll

Pin

using

a

Center

Punch

and

Hammer.

2.

Note

the

location

of

the

Head

Up/Down

or

Head

Tilt

rear

mounts

inside

the

Aluminum

chest

frame.

3.

Loosen

any

parts

inside

the

chest

frame

that

will

prevent

you

from

lifting

the

head

and

neck

shafts.

4.

Cut

the

Cable

Ties

used

to

hold

the

hose

plumbing

harness

against

the

chest

frame.

Do

Not

cut

open

the

hose

plumbing

harness.

Beware

of

cutting

air

lines

in

the

harness.

5.

Lift

the

head

and

neck

shaft

high

enough

to

slip

the

Actuation

Lever

from

under

the

upper

or

lower

neck

shaft.

6.

Remove

the

old

Actuation

Lever

and

replace

it

with

the

new

one,

in

one

step.

7.

Exchange

the

cylinder's

front

mount

for

a

5/16"

Male

Rod

End

(Part

#28-065-027).

If

a

5/16"

Rod

End

is

already

attached,

check

it

for

wear.

The

ball

should

not

move

back

and

forth

inside

the

race,

replace

it

if

necessary.

8.

Attach

the

front

mount

of

the

cylinder

to

the

Actuation

Lever

using

a

5/16"

x

11/16"

Aircraft

Bolt

(Part

#28-016-012)

and

a

5/16"

Self

Locking

Nut

(Part

#28-018-010)

0

9.

Refer

to

Pages

3-094

thru

3-135

(Critical

Adjustments)

and

set

the

adjustments,

before

tightening

the

Actuation

Lever

into

place.

C.

If

the

welded

aluminum

chest

frame

must

be

replaced

due

to

a

broken

weld

or

aluminum

part:

(See

Drawing

Page

3-054)

1.

Disassemble

and

re-assemble

the

parts

one

step

at

a

time.

Note

the

steps

taken

and

note

the

location

of

the

Head

Up/Down

or

Head

Tilt

rear

mounts.

2.

Separate

as

few

parts

as

possible.

(Don't

pull

the

air

lines

from

the

cylinders,

leave

the

head

attached

to

the

neck

shaft.)

3.

Clean

all

the

parts.

You may

also

want

to

rebuild

the

cylinders

at

this

time.

(See

Pages

3-009

thru

3-011,

and

all

drawings

referred

to

by

that

text)

4.

Re-assemble

the

parts

and

set

all

critical

adjustments

(See

Pages 3-094

thru

3·135)

3-049