28 308442
Service
Tools Included with the Gun
Ball End Wrench
Multi-tool
Prepare the Gun for Service
NOTE:
Check all the possible remedies in Troubleshoot-
ing, pages 23 to 25, before disassembling the gun.
If the plastic parts of the gun must be held in a vise,
use padded vise jaws to avoid damaging parts.
WARNING
EQUIPMENT MISUSE HAZARD
Do not mix or install parts from different
PRO gun models. Some PRO 5500hc
Gun parts look similar to other PRO Gun
parts but they have different part num-
bers and they are not interchangeable.
Use of parts other than those specified
in the PRO 5500hc Gun parts list on
page 39 could alter the grounding conti-
nuity of the gun, cause parts to leak or
rupture, or cause the gun to malfunction, which
could result in a fire, explosion, or electric shock.
WARNING
FIRE, EXPLOSION, AND
ELECTRIC SHOCK HAZARD
To reduce the risk of a fire, explosion, or
electric shock:
Be sure the turbine air (TA) is off
before flushing the gun or any part of
the system.
Clean all the parts with a compatible
solvent that is suitable for electro-
static equipment.
Do not service this equipment unless you are
trained and qualified.
Do not touch the gun nozzle or come within 4
inches (101.6 mm) of the nozzle during gun
operation.
CAUTION
Methylene chloride is not recommended as a flush-
ing or cleaning solvent with this gun as it will damage
nylon components.
WARNING
PRESSURIZED EQUIPMENT
To reduce the risk of a serious injury,
follow the Pressure Relief Procedure
on page 16 when you stop spraying,
before servicing the gun, and whenever you are
instructed to relieve the pressure.
1.
Flush the gun with a compatible solvent.
2.
Relieve the system pressure.
3.
The service area must be clean. Remove the gun
from the worksite as instructed in the following
steps.
4.
Loosen the bottom gun screw (21) until the gun (B)
sits loosely in the mounting bracket slot (A). Refer
to Fig. 19.
CAUTION
The piston return spring (105) is compressed
between the manifold (101) and gun body when they
are assembled. To avoid sudden movement of the
gun, loosen the bottom gun screw (21) before loos-
ening the three manifold bolts (106). This allows the
gun to move forward gradually as the manifold bolts
are loosened. Hold the gun firmly in hand while
loosening the manifold bolts.
5.
Holding the gun (B) firmly in hand, loosen the three
bolts (106) from the back of the manifold (101)
with the ball end wrench (77–not shown).
6.
Remove the gun (B) from the manifold (101), and
take it to the service area.
101
106
03218
102
21
A
Fig. 19
105
B
