Air Motor and Throat Service
Reassembly
1.Clean all the parts carefully in a compatible solvent, and inspect for wear or damage. Use all the repair kit parts during reassembly, and replace other parts as necessary.
2.Check the polished surfaces of the piston (2), displacement rod (8), and cylinder (17) wall for scratches or wear. A scored rod causes premature throat seal wear and leaking.
3.Lubricate all parts with a light,
4.Install the new throat seal (6), lips facing down . Screw the packing nut (38) into the base (5).
5.Slide the displacement rod (8) down through the throat, and lower the piston (2) into the base (5). Be sure the
6.Pull the exhaust valve poppets (16) into the valve actuator (13), and clip off the top part shown with dotted lines in Fig. 5.
7.Install the transfer valve grommets (12), and reassemble the valve mechanism. Before you install the lockwires (31) in the adjusting nuts (30), use the special gauge, 171818, to adjust the transfer valve so there is 0.145 in. (3.7 mm) clearance between the poppets (1b) and the seat when it is open. See Fig. 5. Snap the toggles (25) to the up position.
8.Reassemble the air motor, and assemble to the displacement pump. Torque the extension tube (64) to to base (5) at 45 to 55
9.Before you remount the pump, connect an air hose, and run the pump slowly, at about 40 psi (276 kPa, 2.8 bar), to see that it operates smoothly.
10.Reconnect the ground wire before regular operation of the pump.
L 2
26 27 25
1
M
11 22
31
30
1b
12
30
1b
2
113
13 | 14 | 16 | 1a |
| 30 | ||
|
|
|
12
30 
24
0.145” (3.7 mm)
1b
2
14 | 16 | 04118 |
|
|
1Turn wires up.
2Push toggles (L) in and then up.
3Cut off tops of poppets as indicated by dotted lines.
Cutaway View
04119
Fig. 5
308883 13
