10
8. Install the two small o–rings (103b*) in the grooves of
the inner diameter of the air motor piston (104). Low-
er the piston through the air motor coupling (105) so it
engages the threads of the fluid piston (106). Screw
the air motor piston onto the fluid piston, aligning the
holes to obtain maximum thread engagement. Insert
the setscrew (144) in the holes and torque to 0.4–0.6
N.m (4–6 in–lb).
9. Install the large o–ring (103d*) on the outer diameter
of the air motor piston (104).
10. Apply adhesive to the threads of the housing assem-
bly (103a*) and screw the assembly into the air motor
cylinder (102). T orque to 8–10 N.m (72–88 in–lb).
Apply lubricant to the outer diameter of the air valve
housing assembly (103a) and the inner diameter of
the air motor cylinder (102).
11. Lower the air motor cylinder (102) onto the air motor
coupling (105). Align the air inlet with the fluid outlet,
as was noted in step 2 under
Disassembly.
The air
valve housing assembly (103a) will slide down into
the air motor piston (104). Secure the cylinder to the
coupling with three screws (138) and washers (141).
Torque the screws to 2–4 N.m (17–33 in–lb).
12.
If it was necessary to replace the air valve (165)
or gasket (166),
align and install the new air valve
and gasket on the top of the air motor cylinder (102),
as shown in Fig 2. Install the two mounting screws
and washers and torque to 2–4 N.m (17–33 in–lb).
Lubricate the upper threads of the air motor cylinder
(102). Screw the cylinder cap (101) onto the cylinder.
13. Lower the pump through the mounting bracket (233).
Orient it in the correct direction and secure to the
bracket using the three screws (138) and washers
(141). Torque the screws to 2–4 N.m (17–33 in–lb).
Reinstall the fluid outlet fitting (128).
14. Reinstall the wiper plate assembly (300) on the fluid
intake housing (111). Secure with the two capscrews
(302). Reconnect all hoses and return the pump to
service.
