Graco Dyna-Star 224741, Instructions Manual

Page: 14 / 28

Repair
14 308155U
(12). Reassemble with a retainer (20) on each end
of the new spring (21). You must thread the nut onto
the rod until it runs out of thread, so that it bottoms
out on the should of the rod. (F
IG
. 9)
NOTE: If you are re-using or reassembling any parts,
use a surface cleaner such as chlorinated solvent on the
threads, and blow with compressed air. A 1/4-28
UNF-2A tap can be used to remove adhesive from the
internal threads of the yoke (9).
Thread sealant and primer are required. See Reciproca-
tor Repair Notes on page 13 for specifications. Loctite
®
609 is used only in STEP 9.
9. Apply fresh Loctite
®
609 thread sealant to the first
two or three internal threads of the yoke (9). Apply
primer to the external threads of the rod (12). Let dry
for three or four minutes. Assemble, torquing
screws to 96 to 100 in-lbs (10.8 to 11.2 N.m).
Remove excess sealant.
Allow 24 hours to cure
before operating the reciprocator.
10. Clean all sealant from the threads of any part you
are reusing, and apply thread sealant to the first two
or three internal threads of the valve assembly (31).
If you removed the capscrew (51) , apply primer to
its external threads, let it dry for four minutes and
torque the capscrews to 42 to 45 in-lbs (4.7 to 5.1
N.m). Remove excess sealant.
Allow 24 hours for
the thread sealant to cure before you operate the
reciprocator.
11. Remove the o-ring (13) from the bottom of the spool
valve assembly (31), and replace it with a new
o-ring.
12. Use a spanner wrench to screw the piston (22) onto
the displacement rod (34). Torque to 30 to 40 ft-lbs
(41 to 54 N.m).
F
IG
. 9
20
21
20
18
12
F
IG
. 10
12
38
36,37
31
29
32
22
20
21
18
51
17
*13
6,7
9
17
25
34
See
Fig. 8
20
13*
*24
23*,49*
3,39,2
30
1
1
2
Torque to 42 to 45 in-lb (4.7 to 5.1 N-m)
2
Torque to 30 to 40 ft-lb (41 to 54 N-m)
26