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. Loosen the fitting (1) that secures the air hose to the elbow (2)
fitting on top of the air motor.
3. Underneath the front shroud, remove the clear air tube (3)
that is connected to the air regulator reservoir.
4. Remove the screws (4) and washers that secure the motor
shroud to the air motor. Once removed, carefully lift the entire
assembly off of the air motor.
5. Remove the side plates (5) from each side of the air motor.
2
4 (x8)
3
5
Disassembling the Air Motor
1. Unthread the spring retainer (Fig. 20, item 1) and remove the
spring (2), guide (3) and plunger (4) from both sides of the
detent housing (5). Inspect all parts for wear or damage.
2. Remove the four bolts (6) and washers that secure the detent
housing (5) to the cylinder (7).
3. Remove the axle and roller assembly (8) from underneath
the detent housing (5). Remove the axle from the roller and
inspect both parts.
4. Remove the rubber pad (9) and flat washer (10).
GB
1
2
3
4
7
5. Pull up on the slide valve housing (Fig. 21, item 1) by hand.
Swivel the slide valve housing (1) 90º to expose the internal
components.
6. Remove the valve (2), O-ring (3) and spring (4) from both sides
of the slide valve housing. Inspect the these parts and the
slide valve housing for wear or damage.
1
7. Pull the slide valve housing (1) further upwards. Using pliers,
carefully grip the trip rod (5), being careful not to damage the
surface of the rod. Hold the rod in place. Using an adjustable
wrench, remove the trip rod nut (6).
8. Remove the hub (7) from the trip rod (5).
9. Remove the bolts (8) that secure the manifold assembly (9) to
the cylinder. Remove both of the manifold assemblies (9) and
the manifold gaskets (10) from the cylinder.
10. Inspect the plates (11) on both manifold assemblies. If worn or
damaged, replace.
i
18
8
9
10
If you replace either of the plates (11), you must
replace the valve plate seal (12) also. Remove the
screws from the plate to separate the plate from the
manifold.
8
7
9
5
10*
12
11
6
5
6
1
2
3*
4
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