Repair
312145B 5
Repair
Disassembly
1. Follow Pressure Relief Procedure. Engage trigger lock.
2. Disconnect fluid hose. Remove RAC tip guard and
tip (19 and 20a-20d) or flat tip guard and tip (30, 31 and
32).
3. Using a wrench, remove the cap (4) with spring (5)
(releases spring tension on needle).
4. Remove the valve seat (10) and
gasket (9).
5. Holding the needle with tool (36)
remove the needle retainer (6).
6. Pull the needle (8) out.
7. Using a socket wrench, remove the
seal retainer (2) from the back of the
gun. Use a pick to remove the
gasket (3).
8. Clean and replace parts as needed.
If you need to remove the trigger
XTR 7 Guns
1. Using a wrench, remove screw
(11b) from the pivot pin (11a).
2. Slide the pivot pin (11a) out of
the gun body, and remove the
trigger (16).
3. Before installing trigger, grease
the actuator pins (7) and the
pivot pin (11a).
XTR 5 Guns
1. Using a socket wrench, remove screw (12) from each side
of the gun body and remove trigger.
2. Before installing trigger, grease the actuator pins (7).
Assembly
1. Press a new gasket (3*) into the gun body. Lightly grease
the seal retainer (2*) and install. Torque to 48-72 in-lb (5-8
N•m).
2. Lightly grease and replace the needle (8*). Press the
needle through the seal retainer.
3. Apply light-strength Loctite
™
to needle threads. Holding
the needle with tool (36*), install needle retainer (6).
Tighten until it bottoms out. Do not overtighten.
4. Lightly grease valve seat (10*) threads. Squeeze the
trigger to retract the needle and install gasket (9*) and
valve seat (10*). Torque valve seat to 26-32 ft-lb
(34-43 N•m).
5. Grease and install the spring (5) and cap (4). Tighten the
cap to 10-13 ft-lb (8-10 N•m).
Test Gun Before Using
1. Engage trigger lock. Connect fluid hose to gun.
2. Start and prime the pump.
3. Disengage the trigger lock and trigger the gun into a metal
waste container.
4. Release the trigger. The gun should immediately stop
spraying and there should be no leaks. If there is a
problem, follow Pressure Relief Procedure. Check
through Assembly procedure and correct problem.
5. Install tip and tip guard before regular use.
Technical Data
*Results are maximum readings taken at 6000 psi (41 MPa,
414 bar), with HD519 tip, using water. Sound power level was
tested to ISO 9614-2.
To avoid losing parts, be ready for two actuator pins (7) to
fall out of the gun body when the trigger (16) is removed.
36
6
ti5187a
11b
7
11a
16
ti5190a
Caution
Use only tool (36) and fingers to tighten needle. Do not
overtighten or breakage may occur.
Maximum working pressure:
XTR 5 . . . . . . . . . . 5000 psi (35 MPa, 345 bar)
XTR 7 . . . . . . . . . . 7250 psi (50 MPa, 500 bar)
Fluid orifice . . . . . . . . . . . . . 0.090 in. (2.3 mm)
Fluid inlet . . . . . . . . . . . . . . . 1/4 npsm (m)
Max. fluid temperature. . . . . 160°F (71°C)
Sound pressure . . . . . . . . . . 84.3 dB(A)*
Sound power . . . . . . . . . . . . 95.7 dB(A)*
Wetted parts . . . . . . . . . . . . aluminum, stainless steel, acetal,
polyethylene, nylon, polypropy-
lene, carbide, polyurethane, sol-
vent-resistant o-rings.
