Valve Body

TM 3-1040-220-34&P

(d) Withdraw the trigger from the valve body.

3. Pull out rubber tube and insert the sleeve into

(2) Disassembly. The only part that can be removed

the barrel end of the rubber tube.

from the trigger is the trigger safety. To remove the

4. Install the collar on the barrel end and secure

trigger safety, remove pin and lift off safety.

it in place with three sockethead setscrews.

(3) Cleaning.

Clean the components with

drycleaning solvent (Table 1-1).

2-13. Valve Body

(4) Inspection. Inspect all components for damage

a. Description and Function. The valve body (fig. 2-5)

and wear. Replace as required.

is a one-piece aluminum casting which contains the

(5) Assembly. To install the trigger safety on the

trigger. One end is threaded externally to receive the

trigger proceed as follows:

barrel locknut; the other end is threaded internally to

(a) Position the trigger safety on the trigger and

receive the hose threaded fitting. A safety catch is

secure it to the trigger with pin.

located on the underside of the valve body. This safety

(b) Install the assembled trigger and trigger safety

catch engages the safety trigger and holds the trigger in

in the valve body.

an inoperative position.

(6) Installation. Before installing the trigger, spray

b. Maintenance.

trigger with solid film lubricant (colloidal graphite) and

(1) Disassembly. To disassemble the valve body,

allow it to dry. To install the trigger, proceed as follows:

proceed as follows:

CAUTION

(a) Remove the rubber tube.

(b) Unscrew the locknut and remove the barrel.

Use only solid film lubricant on the

trigger.

(2) Cleaning. Clean the valve body with a brush and

warm soapy water, rinse in clean water, and air dry.

(a) Insert trigger into valve body.

warm soapy water, rinse in clean water, and air-dry.

(b) Position trigger safety so that it engages

(3) Inspection. Inspect the valve body for damage

safety catch.

paying particular attention to the safety catch and the

threaded portions of the body.

the outside end of the spring towards the nozzle end of

Replace the valve body if repair is not possible.

the valve body.

Before using a new valve body, it should be inspected for

(d) Grasp the outside end of the trigger spring with

damage and completeness.

an adjustable wrench and carefully rotate the end of the

(4) Assembly.

To assemble the valve body,

spring counterclockwise until it snaps in place in the slot

proceed as follows:

in the valve body.

(a) Install the trigger.

(b) Place the barrel in line with the valve body and

WARNING

engage the key on the barrel in the slot in the threaded

portion of the valve body. Screw the locknut onto the

The trigger spring must be installed as

threaded end of the valve body.

described in (c) and (d) above, to

prevent injury to personnel which could

CAUTION

be caused by the spring flying out of the

The locknut is a handtight connection. Do not use a

slot in the barrel when tension is exerted

wrench.

on it.

(d) Install the safety catch on the valve body, and

(e) Replace cover plate and secure it with two

secure with two screws fingertight.

screws.

Adjust the safety catch so that the lip of the safety catch

(f) Replace the rubber tube and fittings as follows:

touches and holds the trigger safety with the trigger fully

1. Hold the gun in a vertical position with the

forward. Tighten the screws and check the adjustment.

barrel end pointing down. Depress the trigger safety and

squeeze the trigger and hold it.

2. Insert the rubber tube into the barrel until the

connector seats correctly in the valve body. Release the

trigger. Turn the gun so that the barrel end is pointing

up.

2-14