Repair
Air Motor and Throat Seals
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 needed.
2.Check the polished surfaces of the piston (2), dis- placement 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 value actuator (13), and clip off the top part shown with dotted lines in FIG. 5.
7.Install the transfer valve grommets (12), and reas- semble the valve mechanism. Before you install the lockwires (31) in the adjusting nuts (30), use the special gauges, 171818, to adjust the transfer valve so there is 0.145 inches (3.7 mm) clearance between the poppets (1b) and the seat when it is open. Snap the toggles (25) to the up position. (FIG. 5)
8.Reassemble the air motor, and assemble to the dis- placement pump. Torque the extensions tube (64) to the 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 (.028 MPa, 2.8 bar), to see that it operates smoothly.
10.Reconnect the ground wire before regular operation of the pump.
L2
26 | 27 | 25 | 11 | 22 |
1
M
31
30
1b
12
30
1b
2
11
13 14
3
1a
16
30
12
30
24
0.145 in.
(3.7 mm)
1b
2
14 16
FIG. 5
Cutaway View
10 | 308883S |
