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 TM 55-1905-222-14
6-14
REPAIR HELM UNIT (Continued).
f.
Remove seal plug (21), packing (22), unscrew
check valve seat (23), using a 3/16 hex wrench.
g.
Position housing in hand and tap lightly to
remove steel ball (24) and compression spring
(25).
4.
DISASSEMBLE METERING SECTION.
a.
Loosen six capscrews (26) from the end of the
housing (16) and remove end cap (27).
b.
Remove shaft spacer (28), meter gear (29),
plate (30) and drive shaft (31) from housing
(16). Remove meter gear star (32) from meter
gear (29).
CLEANING
CLEAN ALL PARTS OF THE HELM UNIT.
WARNING
Dry cleaning solvent, P-D-680, used to clean parts, is potentially dangerous to
personnel and property. Avoid repeated or prolonged skin contact. Do not use
near open flame or excessive heat. Flash point of solvent is 100 - 138F (38
-
59C).
a.
Clean all parts, except packing, in cleaning
solvent Fed. Spec. P-D-680.
b.
Set parts on clean paper towel to dry.
c.
Remove burrs from all surfaces of the
material sections with 600 grit abrasive paper
by polishing.
d.
After polishing each part, rinse clean in
solvent and blow dry. Keep these parts
absolutely clean until they are assembled.
6-75
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