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 TM 55-1905-223-24-5
(c)
Remove the gear case (8).
(d)
Install the base (10) and swivel onto the arbor and adapter sleeve.
(e)
Make sure the base (10) is flat against the cylinder head.
(f)
Use capscrew (9) to fasten the base (10) to the cylinder head. Do not
tighten the capscrew.
(3)
Use a seat driver from the tool kit.
(a)
The driver must have the same diameter as the cutter.
(b)
Install the driver over the arbor and adapter sleeve and through the
swivel (FIGURE 4-7).
(4)
Adjust the position of the base (10) and swivel so the driver will move
freely on the arbor.
(a)
Secure the capscrew (9) to hold the base (10) to the cylinder head.
(b)
Secure the clamp screw for the swivel.
(5)
Make sure the alignment is correct, then remove the driver. Use the T-
handle arbor puller (2, FIGURE 4-6) and remove the arbor (1).
(6)
Apply lubricating oil to the arbor and the hole in the adapter sleeve.
(a)
Put the cutter (11, FIGURE 4-7) into position over the valve seat.
(b)
Install the arbor into the valve guide.
(c)
Install the adapter sleeve onto the arbor.
(7)
Install the gear case (8) into the swivel.
(a)
Engage the bottom of the drive shaft (13) with the top of the cutter
(11). Make sure the drive shaft (13) is against the cutter (11).
(b)
Secure the clamp screws (12) to hold the gear case (8) and drive shaft
(13) in the swivel.
(8)
To set the depth of the cutter:
(a)
Rotate the feed depth knob (3) counterclockwise four or five complete
turns.
(b)
Put the new valve seat insert under the knob (3).
(c)
Turn the feed depth knob (3) clockwise until it is against the valve
seat insert.
(d)
Turn the knob (3) counterclockwise until there is 0.006 to 0.010 inch
(0.15 to 0.25 mm) clearance between the knob and the insert.
4-14
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