Air Motor And Throat Reassembly - Graco A Series Instructions-Parts List Manual

PUSH TOGGLES (M) IN
AND THEN UP
(SHOWN IN THE DOWN
POSITION HERE)
37
M
31
30
TURN WIRES UP
L
To remove
toggles,
Push IN,
Swing UP,
Ease OUT
58
53
F . 16
IG
9. Remove the lockwires (34) from the adjusting nuts
(33) of the transfer valves. Screw the top nuts off.
Screw the stems (45) out of the grommets (32) and
the bottom nuts (30). Take the valve poppets (52) off
the stems and squeeze them firmly to check for
cracks. (F . 16)
IG
To reduce the risk of pinching or amputating your
fingers, always keep fingers clear of the toggle
assemblies (N).
10. Grip the pivot pins (30) with pliers. Compress the
springs (31) and swing the toggle assembly (N) up
and away from the piston lugs (L). Remove the
parts. Check to see that the valve actuator (35) is
supports by the spring clips (58), but slides easily
into them. (F . 16)
IG
11. Remove the trip rod yoke (28), actuator (35) and trip
rod (54). Check the exhaust valve poppets (53) for
cracks. To remove the exhaust valve poppets (53),
stretch them out and cut with a sharp knife. (F
12. Remove one muffler plate (20 or 40). Pull the piston
(59) up out of the base. Remove the throat packing
nut (42) and packings. (F
308069P
54
28
34
33
45
32
33
52
59
55
. 16)
IG
. 15)
IG
Air Motor and Throat
Reassembly
1. Clean all the parts in a compatible solvent and
inspect for wear or damage. Check the polished sur-
faces of the piston, piston rod, and cylinder wall for
scratches or wear. A scored rod will cause prema-
ture packing wear and leaking. Use all the repair kit
parts and replace other parts as necessary.
2. Lubricate all parts with a light, waterproof grease.
3. One at a time, install these parts in the base (55):
the gland (49), alternately install three reinforced
packings (48) and two nitrile packings (72) with lips
facing down, bearing (50), back up washer (43), flat
packing (44), and loosely screw in the packing nut
(42). Be sure the o-rings (38 and 39) are in place.
(F . 15)
IG
4. Install the poppets (52) on the valve stems (45). Pull
the exhaust valve poppets (53) into the valve actua-
tor (35) and clip off the top parts shown with dotted
lines. (F . 17)
IG
54
58
35
CUTAWAY VIEW
F . 17
IG
Service
CUT OFF TOPS OF
POPPETS AS
INDICATED BY
DOTTED LINES
53
45
33
32
33
36
0.145"
(3.7 mm)
52
59
17