16605883_ed2
3
Assembly of the Valve Box Assembly and Lapping
Oversize Valve into Valve Box
Valve Lapping
Arbor
Tighten Screw slightly
to retain Valve on Arbor
Valve
Valve
Valve
Valve Box
Rear Section
Valve Box
Rear Section
Valve Box
Front Section
Valve Box
Front Section
Press Dowel Pin in
to this Dimension
Clean Holes with
1/32” Drill
Keep free of
Lapping Compound
Keep free of
Lapping Compound
Figure 1
Figure 2
Figure 3
Figure 4
1/8”
A
B
B
C
C C
(Dwg. TPB130)
An oversize Valve (20) must be lapped into the Valve Box (18). Use
Grade 320 lapping compound and proceed as follows:
Install the Valve on the No. 29189 or No. 29407 Valve Lapping
Arbor as shown in Figure 1.
Apply lapping compound to diameter “C” only; keep diameter
“B” free of compound at all times. Insert the compound-
coated end of the Valve into the rear section of the Valve Box
as shown in Figure 2 and lap until a free fit is obtained.
Wipe all compound from the Valve and from the internal
diameter “B” in the Valve Box. Allow the compound to remain
on the internal diameter “C”.
Install the front section of the Valve Box on the Arbor as
shown in Figure 3.
Apply compound to Valve diameter “A” and lap the small end
of the valve to a free fit in the front section.
Slide the rear section of the Valve Box over the Valve and
assemble it on the front section as shown in Figure 4. Lap the
Valve until it fits freely in the assembled Valve Box.
2. Disassemble the Valve Box, clean the air ports with a 1/32” drill
and wash the Valve and both sections of the Valve Box in a clean,
suitable solution to remove all trace of the compound.
3. Apply 6 or 8 drops of light oil to the external surface of the Valve
and assemble it with the Dowel Pin (19) in the Valve Box. Shake
the assembly to see that the Valve moves freely in the Valve Box.
Assembly of the Throttle Mechanism
Clamp the Handle of the tool in leather-covered or copper-
covered vise jaws with the Air Inlet Bushing (17) upward.
With a new Throttle Valve Seal (6) on the Throttle Valve
Assembly (5), place the Valve Assembly into the Handle, Seal
upward.
With the stem of the Throttle Adjusting Screw (11) going through
the Throttle Valve Spring (9), install the Spring/Screw into the
Handle.
With a new Throttle Adjuster Sleeve Seal (15A) on the Throttle
Adjuster Sleeve (15), place the Sleeve into the Throttle Adjuster
Body (10).
Carefully place the Throttle Adjuster Stop Spring (12) and the
Throttle Adjuster Stop Ball (13) in the Throttle Adjuster Body.
Secure the Spring/Ball with the Throttle Adjuster Knob (14) and
the Throttle Adjuster Cap Screw (16).
Secure the Throttle Adjuster Screw with the Throttle Adjuster
Body.
Reinstall the Air Inlet Bushing (17).
Assembly of the Tool
Clamp the Handle of the tool in leather-covered or copper-
covered vise jaws with the barrel bore upward.
Place the Valve Box Assembly into the Handle, larger half of the
Valve Box in first.
With the Piston (23) in the bore of the Barrel (24), screw the Barrel
into the Handle.
Place the Locking Key (21) into one of the slots in the Barrel/
Handle Assembly.
Secure the Locking Key with the Exhaust Deflector (22).
1.
a.
b.
c.
d.
e.
f.
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2.
3.
4.
5.
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7.
8.
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Содержание 132
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