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308200 15
Service
15. To disassemble the piston guide assembly (V),
place the flats of the piston seat (15) in a vise.
Close the jaws just tight enough to hold the part; it
can be damaged by squeezing it too tightly. Using
an 8 mm (5/16 in.) dia. brass rod, unscrew the
piston guide (12) from the piston seat (15). See
Fig. 5. Remove the piston seal (14); always re-
place with a new one. Inspect the mating surfaces
of the piston (13) and piston seat (15) for nicks,
scoring or wear.
Fig. 5
12
15
0205
Brass
Rod
16. To disassemble the intake check valve assembly
(U), place the nut (27) in a vise and unscrew the
intake valve body (25) from the nut, using a 25 mm
wrench. See Fig. 6. Remove the seal (30) from the
nut (27) and the other seal (26) from the valve
body; always replace them with new ones. Inspect
the mating surfaces of the intake valve body (25)
and seat (18) for wear, scoring, or other damage.
Fig. 6
25
27
0206
NOTE: The seal (30) is press-fit in the nut (27), and
may require cutting with a razor to ease removal.
17. Inspect all parts and threads, and clean with a
compatible solvent. To reassemble, see page 17.