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KEY
A Hydraulic
pump
B
Rac IV DripLess tip guard
and spray tip
4
Pressure control knob
5
Hydraulic oil fill cap
11
ON/OFF switch
18 Motor
21 Diaphragm
22
Paint pump
27 Strainer
59
Drain tube
66
Bypass valve
67 Outlet
101
Paint hose
102
Spray Gun
59
0266
0267
0270
27
66
4
63
A
5
102
101
B
18
11
21
22
1
3
4
2
Decrease
pressure (counterclockwise).
Increase
pressure (clockwise).
Open (counterclockwise).
Close (clockwise).
1
2
3
4
1
3
4
2
Decrease
pressure (counterclockwise).
Increase
pressure (clockwise).
Open (counterclockwise).
Close (clockwise).
Motor
The
SHER
WIN-WILLIAMS PT2500 Sprayer has a 1/2
HP
, 120 V
, 60Hz AC, single phase, 1725 rpm motor
(18). The motor is supplied with a three-wire power
supply cord and a three-prong plug. The sprayer ON/
OFF switch is located on the box on the side of the
motor. The motor’
s function is to drive the hydraulic
pump. The motor runs continuously when it is turned
on to keep the paint at the desired pressure.
Paint Pump
The paint pump (22) is immersed directly into a 5 gal
-
lon paint pail, so the pump is actually being pressure
fed without the mess and trouble of pouring paint into a
hopper.
Hydraulic Pump
The hydraulic pump (A) is located inside the hydraulic
reservoir
. The motor drives an eccentric bearing which
pushes the piston in and out of the hydraulic pump.
The pump reciprocates the hydraulic fluid to operate
the diaphragm.
Diaphragm
The diaphragm (21) separates the hydraulic and paint
portions of the paint pump. Hydraulic oil causes the
diaphragm to move up and down almost 30 times per
second, no matter what pressure you are spraying at.
Pressure Control Knob
The paint pressure is regulated by turning the pressure
control knob (4)
clockwise
to increase pressure and
counterclockwise
to decrease pressure.
Bypass V
alve
The bypass valve (66) has two functions: (1) to assist
in priming the paint pump during initial startup, and (2)
to provide positive relief of paint pressure from the
gun, hose and sprayer
.
Paint Hose
One electrically conductive nylon paint hose (101) is
supplied with the sprayer
. This 7 m (25 ft.) hose has a
6 mm (1/4 in.) ID, 1/4 npsm(f) couplings and spring
guards on both ends.
Spray Gun, Reverse-A-Clean (RAC) IV T
ip Guard
and Spray T
ip
The spray gun (102) has a tough, lightweight plastic
body
. The gun has a trigger safety lever which pre
-
vents accidentally triggering the gun when the lever is
set in the safe position. (See
WARNINGS
, page 4.)
The Reverse-A-Clean IV T
ip Guard (B) uses high pres
-
sure fluid to unclog the spray tip without removing it
from the gun. (See page 12.) The RAC IV includes a
safety tip guard which helps reduce the risk of a fluid
injection injury
. A No. 413 spray tip for use with latex
paint is also included.