Graco Lube Pro 24Z020 Instructions Manual page 17

Pump Piston Subassembly (33).
16. Secure a wrench on the flats of piston rod (34). Use
a second wrench to remove the lock nut (31) and
star washer (32) from top of the piston (F
17. Remove the lock nut and star washer. Keep these
parts for reassembly.
31
32
33
F . 19
IG
18. Examine the piston assembly (33) for scratches and
other wear and damage. If damaged, replace the
pump piston assembly (33).
19. Reposition the air motor cylinder in vise to access
the bottom of the air motor cylinder (F
3A4033J
20. Secure a wrench on the cover nut (1a). Turn it
counter-clockwise loosen and remove the cover (1)
from bottom or air motor cylinder. (F
. 19).
IG
F . 20
IG
NOTE: There is a spring (6) inside the air motor cylinder
(3) under the piston (5). Hold hand on the cover (1) for
resistance and hold it down while loosening the cover
screws (1a) (F
31
32
33
34
. 20).
IG
F . 21
IG
1A
. 21).
IG
5
Repair
. 20).
IG
1
6
34
3
17