TM 10-4130-237-14
6
2.
CYLINDER BLOCK ASSEMBLY REPAIR/OVERHAUL (CONT)
20 Check valve guides with valve guide plug gage. If valve guide plug gage can be inserted into the valve
guide for a distance of 5/16 in. (8 mm), the guide is worn. Rebush guide by following steps 21 through
24.
Ream to only 1/16 in. (1.6 mm) deeper than valve guide bushing 230655.
DO NOT ream through the guide.
21 Using reamer and reamer guide bushing, ream out the worn guide.
Kerosene is flammable. To prevent fire or explosion, DO NOT bring open
flame or sparks near kerosene.
22 Lubricate reamer as necessary with kerosene.
23 Press in valve guide bushing until top end of bushing is flush with top end of valve guide.
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