
Repair - Pneumatic Motor
20
3A6823A
Repair Pneumatic Motor
NOTE:
Pneumatic Motor Seal Kits are available. See
Pneumatic Motor Parts List
, page 27, for the correct
kit for your motor. For best results, use all parts in the
kit.
Disassemble the Pneumatic Motor
1.
2.
Use a 10 mm socket wrench to remove the four
screws (218), and remove the pneumatic valve
(217) and gasket (216). See the figure on page 26.
3.
Remove the four screws (218), and remove the
manifold (215) and two gaskets (214).
4.
Use a 10 mm socket wrench to remove the pilot
valves (219), and the top and bottom covers (213
and 201).
5.
Use a 17 mm socket wrench to the tie bolts (210).
The number of bolts depends on your configuration.
6.
Remove the top cover (213) and the o-ring (209).
7.
Remove the shield (212) from around the
cylinder (211), and remove the cylinder.
8.
Slide the piston assembly straight up off the bottom
cover (201).
NOTE:
There is no need to take apart the piston assem-
bly. If any part is worn or damaged, the individual pis-
tons and plungers are available as kits and should be
replaced.
9.
Remove the o-ring (208) from around the piston
(205).
10. Remove the retaining ring (204), u-cup seals (203
and 233), and the o-ring (209) from the bottom
cover (201).
Reassemble the Pneumatic Motor
NOTE:
For easier reassembly, start with the top
cover (213) turned over on the workbench and assem-
ble the pneumatic motor upside-down.
1.
Lubricate and install the o-ring (209) on the top
cover (213). See the figure on page 26.
2.
Install the upper bumper (229) on the top cover.
3.
Lubricate the inside of the cylinder (211). Lower the
cylinder onto the top cover (213).
4.
Lubricate and install the o-ring (208) around the pis-
ton (205).
5.
Slide the piston assembly down onto the
cylinder (211). Be sure the o-ring (208) stays in
place.
6.
Install the shield (212) around the cylinder (211) and
in the groove on the top cover (213).
7.
High-pressure pumps only.
Lubricate and install
the u-cups (203 and 233) into the seal
housing (240).
8.
The arrange the seal stack as shown in F
and high-pressure pumps have different seal stack
arrangements), then lubricate and install into the
bottom cover (201).
9.
Install the spacer (202) and retaining ring (204).
Configuration
T6000
T7500
ti12749a
ti12750a