Troubleshooting The Air Motor; Preventive Maintenance Schedule; Check Chart - Graco Premier 222800 Instructions-Parts List Manual

Troubleshooting the Air Motor

Preventive Maintenance Schedule

The operating conditions of your particular system
determine how often maintenance is required. Estab-
lish a preventive maintenance schedule by recording
when and what kind of maintenance is needed, and
then determine a regular schedule for checking your
system.
Checking the Air Motor for Leaks
or Damaged Parts
If the pump is not performing well, the problem could
be in the air motor. To check the air motor, perform the
following steps.
1. Close the bleed-type master air valve. Disconnect
the air line.
2. Remove the shroud. Refer to page 10.
3. Reinstall the air inlet fitting (22). Reconnect the air
line.
4. Open the bleed-type master air valve and set the
air regulator to about 0.1 MPa, 1 bar (14 psi).
Observe the rocker arms and trip rods for smooth
operation. Check at points A through E in Fig. 2 by
listening or feeling for escaping air, or squirting a
small amount of oil around the suspected leak.
The oil will bubble if air is leaking. Refer to the
sections noted in the Check Chart for detailed
service procedures.
A, B
Fig. 2
8 308213
(4) E
(45) D

Check Chart

NOTE: Service the air valve every 3 million cycles. If
the air motor stalls, service the air valve immediately.
Ref. Problem
Letter
A Rocker assemblies
(29) not operating.
B Air escaping around
trip rod or push rods.
C Air escaping around
air valve (25).
D Air escaping around
or out of exhaust
manifold (45).
E Air escaping around
piston rod (4).
F Air motor stalls.
A, B
Refer to:
Service rocker arms
(see pages 16 and
17).
Service trip rod
and air valve
(see pages 10–15).
Service push rod
seals (see pages 16
and 17).
Service air valve
and air valve gaskets
(see pages 10–15).
Service slide blocks
and air valve seals
(see pages 10–15).
Service piston and
rod seals (see pages
18 and 19).
Service air valve (see
the NOTE above, and
refer to pages 10–15).
Install the detent, trip
rod, and air valve kits
(see pages 21–24).
22
29 (under the cover)
C (25), F
29
06547A