13307-050
Service
Piston Repair
(See Fig. 9)
12. Remove the screws (44) and lockwashers (39) and
pull the cylinder (81) straight up off the piston. Re-
move
the dampener pad (61) and washer (60).
13. Remove
the trip rod bearing (1), using a 1 in.socket
wrench. Remove the gasket (51), washer (54) and
packing (55) from the bearing.
14. Pull
the piston (89), piston rod (90) and trip rod (33)
up out of the base (2). Remove the o–ring (62).
15. Place
a wrench on the turned down part of the piston
rod
(90) and screw out the stud (73).
16. Place
a
wrench on the top of the trip rod (33) and turn
the rod clockwise until the top socket (72) is free.
Then
count the number of turns it takes to screw out
the
bottom socket (71). W
rite the number down: it is
important
when reassembling the motor
.
NOTE: If the trip rod is broken, use a 9/16 in. hex key
wrench to remove the bottom socket (71). A
damaged
trip rod cannot be repaired; use a new
one.
17. Remove the trip rod (33) from the piston rod (90).
See
Fig 7.
01820
62
90
33
89
Fig 7
Reassembly (See Fig. 9)
1.
Clean all parts thoroughly and inspect for wear or
damage.
Replace parts as necessary
.
2.
Screw
the bottom socket (71) into the piston rod (90)
the
number of turns you counted in Step 16, above.
The end of the socket should extend 1/8 in.(3 mm)
from
the piston (89). Slide the trip rod into the piston.
Install the top socket (72), turning it clockwise until
the
socket is flush with the top of the
piston; the bot
-
tom socket should be 1 in. (25 mm) into the piston
rod.
See Fig 8.
Fig 8
50
73
62
33
89
1
3
72
1
2
3
Flush
with piston (89)
when assembled corectly
Apply
thread
locking
compound
1”
to threaded
part
when
assembled
correctly
3.
Place a copper gasket (50) on the piston stud (73).
Apply
thread sealant to the stud
threads, and screw
the
stud firmly into the piston assembly
.
4.
Check the adjusting mechanism by turning the trip
rod (33) clockwise until it stops. The top socket
should extend about 1/16 in. (2 mm) above the pis-
ton. Now turn the rod counterclockwise until the
socket
is again flush with the piston.
5.
Grease
the
cavity in the base (2) and install a washer
(57*)
and
a v–packing (56*) so the lips of the v–pack
-
ing
face up in the base.
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