Graco EM 5000 Instructions-Parts List Manual page 34

DO NOT ALLOW NUT
(411) TO MOVE WHEN IN-
STALLING PISTON ONTO
ROD
411
TORQUE NUT
AGAINST ROD
TO 27 N.m
Fig. 41
6. Use a wrench to CAREFULLY tighten the nut (411)
against the piston rod to 25 N.m. See Fig. 41.
Use two wrenches to maintain the alignment men-
tioned in Step 4., page 33.
7. Put a new o–ring (417*) firmly in the cylinder groove.
See Fig. 42.
8. One at a time stack the male gland (408*), alternate
the packings (413*, 40 7*), and then install the female
gland (409*), into the top of the cylinder (419). See
Fig. 42.
9. Install the packing nut (416) and plug (405), but leave
loose for now. See Fig. 42.
NOTE: The tapered end of the sleeve is the bottom of it.
Do not install it upside down. See Fig. 42.
10. Coat the piston rod and packings with oil. Carefully
slide the assembly INTO THE TOP OF THE
SLEEVE.
And then slide the sleeve/piston rod assembly INTO
THE BOTTOM OF THE CYLINDER. This procedure
helps prevent damaging the packings during reas-
sembly. See Fig. 42.
PISTON
ASSEMBLY
Fig. 42
Displacement Pump
424
417*
419
418
TAPERED END
0030
*409
*407
LEATHER
LIPS MUST
FACE DOWN
*408
*417
*406
LEATHER
LIPS MUST
FACE UP
*403
U–CUP SEAL
LIPS MUST
FACE DOWN
*401
TORQUE TO:
146 N.m
Fig. 43
11. Screw down the cylinder locknut (27) until it is finger
tight at the bottom of the external cylinder threads.
12. Put the flats of the intake valve (423) in a vise. Install
a new o-ring (401*) and screw the intake valve onto
the pump cylinder. See Fig. 42. Torque the valve to
146 N.m.
13. Reinstall the pump. See page 32.
405*
416
27
413*
POLY
LIPS MUST
FACE
DOWN
419
418
410*
412*
POLY
LIPS MUST
FACE UP
415*
414*