Removal. - TM-9-2815-224-34-P0107

TM 9-2815-224-34&P

Cylinder Head Maintenance Instructions (Cont)

a. Removal.

NOTE

There are 16 valve seat inserts on a cylinder head. All valve seat inserts are

removed in same manner.

(1) Support cylinder head (l), bottom side up, on two thick wooden blocks.

(2) Remove valve seat insert (2) out of cylinder head (1) using valve seat collet and puller assembly.

b. Installation.

NOTE

New valve seat inserts are pre-ground and need

not be ground after installation. All inserts are

installed in same manner.

(1) Put cylinder head (1) in water heated to a

temperature of 180 to 200F (82 to 93C) for

not less than 30 minutes.

WARNING

Be sure to wear protective gloves and clothing to

prevent personal injury when handling heated

part.

(2) Place cylinder head (l), bottom side up, on wooden blocks and place valve seat insert (2), seat

side up, in counterbore.

(3) Drive valve seat insert (2) into place until seated solidly in cylinder head using valve seat insert

installer.

(4) Set dial indicator on cylinder head and check roundness of each valve seat insert relative to

valve guide. Total runout must not exceed 0.002-in. (0.05 mm).

(5) If runout exceeds 0.002-in. (0.05 mm), check for damaged or worn valve guide.

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