Graco GM 5000 User Manual

 
Displacement Pump Repair
Fig. 31
424
Do not allow nut (41 1) to
move when installing piston
onto rod
1
2
T
orque nut
against rod to
19 ft–lb (26 N.m)
2
411
1 2
6. Use a wrench to CAREFULLY tighten the nut (411)
against
the piston rod to 19 ft–lbs (26 N.m). See Fig.
31.
NOTE: Use two wrenches to maintain the alignment
mentioned
in the NOTE following Step 4, page 32.
7. Put a new o–ring (417*) firmly in the cylinder groove.
See Fig. 33.
8. One at a time stack the male gland (408*), alternate
the packings (413*,407*), and then install the female
gland (409*), into the top of the cylinder (419). See
Fig.
33.
9. Install the packing nut (416) and plug (405), but leave
loose for now . See Fig. 33.
NOTE: The tapered end of the sleeve is the bottom of it.
Do not install it upside down. See Fig. 32.
10. Coat the piston rod and packings with oil. Carefully
slide the assembly (A) INTO THE TOP OF THE
SLEEVE
(418) . Then slide the sleeve/piston rod as -
sembly INTO THE BOTTOM OF THE CYLINDER
(419). This procedure helps prevent damaging the
packings
during reassembly . See Fig. 32.
Fig. 32
0030
419
418
A
1
Tapered
end
1
419
Fig. 33
412*
413*
410*
405
*406
*403
415*
414*
*401
*408
*407
*409
*417
418
416
27
1
3
4
2
Leather
Polyethylene
Lips
must face DOWN
Lips must face UP
U–cup seal
T orque to
1 10 ft–lb
(146 N.m)
1 3
3
2
1 4
2
4
5
6
3
5
6
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 into
the pump cylinder. See Fig. 33. Torque the valve to
110
ft–lb (146 N.m).
13. Reinstall the pump. See page 31.

Graco GM 5000 Specifications

General

Brand	Graco
Model	GM 5000
Category	Paint Sprayer
Language	English