Repair
312796R 9
Repair

Preventive Maintenance

Schedule

The operating conditions of your system determ ine how
often maintenance is required. Establish a prevent ive
maintenance schedule by recording when and what kind
of maintenance is needed, and then determine a regular
schedule for checking your system.

Pressure Relief Procedure

1. Engage the trigger lock.
2. Close the bleed-type master valve.
3. Disengage the trigger lock.
4. Hold a metal part of the gun firmly to a grounded
metal pail. Trigger the gun to relieve pressure.
5. Engage the trigger lock.
6. Open all fluid drain valves in the system, having a
waste container ready to catch drainage. Leave
drain valve(s) open until you are ready to spray
again.
7. If you suspect the spray tip or hose is clogged or
that pressure has not been fully relieved after follow-
ing the steps above, VERY SLOWLY loosen tip
guard retaining nut or hose end coupling to relieve
pressure gradually, then loosen completely. Clea r
hose or tip obstruction.

Repair Air Valve

Replace Complete Air Valve

1. Stop the pump at the middle of its stroke. Reliev e
the pressure. See procedure at left.
2. Disconnect the air line to the motor.
3. For motors with DataTrak: Remove screw (32) to
disconnect the reed switch (31) from the air valv e
(17).
• Trapped air can cause the pump to cycle unexpect-
edly, which could result in serious injury from skin
injection or moving parts.
• Do not lift or move motor while pressurized.
F
IG
. 3: Reed switch assembly & air line removal
ti12727a
31
32
air
line