Graco 312145G important safety instructions Repair

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.

ti10637b

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	36
	tool (36) remove the
	needle retainer (6).
7.	Pull the needle (8) out.	6
8.	Using a socket wrench,
	remove the seal retainer
	(2) from the back of the
	gun. Use a pick to remove	ti5187a
	the gasket (3).

9. Clean and replace parts as needed.

If you need to remove the trigger

To avoid losing parts, be ready for two

actuator pins (7) to fall out of the gun body when the trigger (16) is removed.

Repair

3.Before installing trigger, grease the actuator pins (7) and the pivot pin (16a).

XTR 5 Guns

1.Using a socket wrench, remove screw (16c) 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.

Caution

Use only tool (36) and fingers to tighten nee-

dle. Do not overtighten or breakage may

occur.

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

XTR 7 Guns

1.Using a wrench, remove screw (16b) from the pivot pin (16a).

2.Slide the pivot pin (16a) out of the gun body, and remove the trigger (16).

16b

7

16 16a ti5190a

	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.

312145G 7