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Repair
312145D 7
Repair
Disassembly
1. Follow Pressure Relief Procedure.
Engage trigger lock.
2. Disconnect fluid hose. Remove RAC tip
guard and tip (19 and 20a-20c) or flat tip
guard and tip (30, 31 and 32).
3. RAC tip only: use tool to push gasket and
seal out back of housing.
4. Using a wrench, remove the cap (4) with
spring (5) (releases spring tension on
needle).
5. Remove the valve seat (10) and
gasket (9).
6. Holding the needle with
tool (36) remove the
needle retainer (6).
7. Pull the needle (8) out.
8. Using a socket wrench,
remove the seal retainer
(2) from the back of the
gun. Use a pick to remove
the gasket (3).
9. 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.
To avoid losing parts, be ready for two
actuator pins (7) to fall out of the gun body
when the trigger (16) is removed.
ti10637b
36
6
ti5187a
11b
7
11a
16
ti5190a
Caution
Use only tool (36) and fingers to tighten nee-
dle. Do not overtighten or breakage may
occur.