Servicing; Servicing The Air Motor - Titan 0533423S Operating Manual

Servicing

8. Servicing
8.1

Servicing the Air Motor

The Air Motors require a normal mantenance inspection at 1500
hours of service on the non-circulating models.
Service procedure includes replacement of the Motor Service Kit (see
next page for part numbers). It is suggested that one Motor Service
Kit be kept on hand for normal maintenance and emergency repairs.
See next page for part numbers of the Motor Kit.
Accessing the Air Motor (Fig. 19)
In order to be able to access the air motor, certain components must
be removed.
i The piston rod in the fluid pump should be in the
lowest-dead center position prior to performing
these steps. The shutoff valve can be used to allow
the sprayer to run slowly.
1. Remove all external air and fluid hoses from the sprayer.
2. Press the collar on the lower air hose fitting (1) and remove
the air hose from the lower air hose fitting only.
3. Underneath the front shroud, remove the clear air tube (2)
that is connected to the air regulator reservoir.
4. Loosen the cylinder cap nut (3) so that its handle is oriented
side-to-side and is aligned with the gap in the top shroud (4).
5. Remove the lower screws (5) that secure the motor shroud
assembly (6) to the air motor. Once removed, carefully lift the
entire assembly off of the air motor.
4
6
2
3
Disassembling the Air Motor (Fig. 21)
1. Remove the pin (1) that connects the air motor piston rod
(2) with the fluid pump displacement rod (3). Using a
wrench on the flats of the displacement rod (3), unthread the
displacement rod from the piston rod.
2. Remove the lower stanchion nuts (4). Gently lower the fluid
pump (5) away from the air motor.
3. Fully loosen the cylinder cap nut (6). Gently pull up the
cylinder cap nut to expose the trip rod (7). Using a pliers, grip
GB
5 (x6)
1
18
the hex nut (7) on the trip rod, and loosen and remove the
cylinder cap nut from the trip rod.
Be careful not to damage the outer surface of the
trip rod. A damaged trip rod will cause the air motor
to operate incorrectly.
Attention
4. Remove the screws (8) that hold the cylinder (9) and air motor
base (10) together. Be careful not to lose the shroud brackets
or washers that will be removed also. Pull off the cylinder.
Remove the o-ring (31) on top of the motor base.
When removing the cylinder, remove it straight up.
Avoid tilting. Tilting can damage the cylinder wall.
Attention
5. Pull the piston assembly (11) from the air motor base (10). The
piston rod (2) will remain attached within the piston.
6. Check the bearing down in the center of the air motor base. If
worn, replace the motor housing.
i
If the bearing is worn, the entire air motor base will
need to be replaced.
7. Place the flats of the piston rod (2) into a vise to secure the
entire piston rod assembly.
8. Using a screwdriver, push down on the trip rod yoke (fig. 20,
item 12) and snap the toggles (13) down.
PINCH HAZARD. Keep your fingers clear of the
toggle assemblies (13) when you are snapping the
toggles up or down.
9. Place the tip of a screwdriver between the piston lugs (14)
and below the toggle rocker (15) (place screwdriver at place
marked by asterisk, fig. 20).
10. Push forward and up with the screwdriver to compress the
springs on the toggle assembly (13) up and away from the
piston lugs. Remove the springs (16) toggle arms (17), and
toggle pins (18).
Place your hand above the toggle assembly as you
i
perform this step. This will prevent parts from
popping out.
14
15
*
11. Straighten the lockwires (fig. 21, item 19) and remove them
from the upper valve nuts (20). Remove the upper valve nuts.
12. Remove the hex nut from the trip rod (7). Remove the trip
rod yoke (12) and the actuator (21). Thread the hex nut (7)
back onto the trip rod to prevent it from sliding down into the
piston rod.
13. Remove the lower valve nuts (22) and remove the inlet valve
poppets (23). Make sure the spring clips (24) are not worn or
damaged, and that they properly guide the actuator (21).
11. Remove the exhaust valve poppets (25) by cutting them with a
side cutter. Remove them from the actuator.
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13
18
17
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AirCoat