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MAINTENANCE 

With proper care, your PW4000A GunJet

®

 will give you reliable service. To 

maintain this performance, parts should be inspected regularly and replaced 

when necessary with genuine 

Spraying Systems Co.

 parts. 

DISASSEMBLY PROCEDURE: 

(SEE FIGURES 1 & 2 ON PAGE 9)

 

If it becomes necessary to rebuild the Valve Assembly (3 - 13) order Spare Parts 

Kit ABPW4000A-KIT or ABPW4000AW-KIT, follow these steps: 
1.

 

Make sure all air, electrical and liquid lines to the pump are turned off. 

2.

 

Release all the pressure and liquid (from the hose to GunJet) by 

operating Trigger until fluid ceases to flow. 

3.

 

Set Trigger Lock (17) in locked position. 

4.

 

Remove spray gun from hose. 

5.

 

Remove the five Screws (19) and Housing (18). See Figure 1, Page 9. 

6.

 

Lift out all internal parts, leaving all parts assembled. Trigger Lock (17) 

should remain in Housing (18). 

7.

 

Clamp the Valve Body (2) and remove Retaining Screw (4) containing 

Gasket (5), Back-Up Ring (6) and O-ring (7). See Figure 2, Page 9. 

8.

 

Remove Stem (9), Valve Seat (8) with Back-Up Ring (11) and O-ring (12), 

as well as Ball (10) and Spring (13). 

PARTS REPLACEMENT/ASSEMBLY PROCEDURE:  

(SEE FIGURES 1 & 2 ON PAGE 8)

 

1.

 

Install new Back-Up Ring (11) and O-ring (12) on new Valve Seat (8). 

2.

 

Clamping Valve Body (2) insert the following new parts: Spring (13), Ball 

(10) and Valve Seat Sub-Assembly (8, 11 & 12) into Valve Body. 

3.

 

NOTE: Cross-drilled holes in Valve Seat (8) should be in line with inlet 

of valve body to minimize pressure loss. See “Figure 2”. 

4.

 

Remove Gasket (5), O-ring (7), and Back-up Ring (6), from Retaining 

Screw (4) and replace with new parts. 

Summary of Contents for GunJet PW4000A

Page 1: ...PW4000A GunJet Spray Gun USER GUIDE spray com MI PW4000A...

Page 2: ...l PW4000AW incorporates a continuous Weep feature to minimize the chance of freezing and with the exception of the valve seat sub assembly the PW4000A and PW4000AW GunJet spray guns are identical and...

Page 3: ...CHARGE NOZZLE A MINIMUM OF 4 0 FEET 1 22 M FROM THE TRIGGER MECHANISM DO NOT ASSEMBLE DISCHARGE NOZZLE DIRECTLY INTO THE SPRAY GUN 1 DO NOT aim gun at any person or any part of the body Fluids under h...

Page 4: ...dopt a secure body stance prior to and during spray operation to safely control the high reactionary force of this unit 3 DO impress on other people in the spraying area the importance of obeying stri...

Page 5: ...ed the maximum operating pressure to be used When spray gun is being used in a possible explosive or flammable environment a grounded type hose should be used 3 Follow your pump and component parts ma...

Page 6: ...move the five Screws 19 and Housing 18 See Figure 1 Page 9 6 Lift out all internal parts leaving all parts assembled Trigger Lock 17 should remain in Housing 18 7 Clamp the Valve Body 2 and remove Ret...

Page 7: ...DAMAGE THE O RINGS SEE FIGURE 2 5 Insert new Stem 9 through Retaining Screw Sub Assembly 4 thru 7 inserting rounded end through O ring 7 6 Install and tighten Retaining Screw Sub Assembly and Stem int...

Page 8: ...8 Figure 1 Figure 2...

Page 9: ...9 PARTS LIST...

Page 10: ...10...

Page 11: ...11...

Page 12: ...North Avenue and Schmale Road P O Box 7900 Wheaton IL 60187 7901 Tel 1 800 95 SPRAY Intl Tel 1 630 665 5000 Fax 1 888 95 SPRAY Intl Fax 1 630 260 0842 www spray com MI PW4000A Spraying Systems Co 201...

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