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CUHF-
High Volume Low Pressure
Manual Spray Gun
OPERATING INSTRUCTIONS & REPLACEMENT PARTS
INSTRUCTION AND PARTS LIST CUHF-8/31/2011
Supersedes Instructions & Parts List CUHF-10/2007
WARNING: Spray materials may be harmful if inhaled or
allowed to come into contact with the skin or eyes. Consult
the product label and Material Safety Data Sheet supplied
for the spray material. Follow all safety precautions.
CA U T ION: We ll Vent i l ated Ar e a to remov e fume s ,
du s t or ov e r spray. Secure airhose and flu i d hose
wr e n ch tight fo r s afety an d t o p r event le a ks.
M a x i m u m A i r P r e s s u r e 5 0 P . S . I .
M a x i m u m F l u i d P r e s s u r e 4 5 P . S . I .
DESCRIPTION:
CUHF- Manual Spray Gun is for use with Light to Heavy
consistency materials. Best spray results are achieved
using pressure fluid feed, although gravity and siphon
cups can also be used. These models require 3 to 10
C.F.M. @ 20 to 50 P.S.I. air pressure depending on size
of Spray Head selected and material being sprayed.
SPECIAL NOTE: CFH- Spray Head with U-3609 Air
Inlet Tube required for High Volume Low Pressure
operation.
AIR CONNECTIONS:
This model has 1/4" N.P.T. Air Inlet.
1. Open air control valve and blow out Air Hose to
remove any foreign particles that may be in airline.
Warning: Secure air hose so it doesn’t injure
anyone during purging.
2. Connect air hose to U-3609 Air Inlet Tube on the
CUHF- Bottom Air Inlet Model.
FLUID CONNECTIONS:
This model has 3/8" N.P.T. Fluid Inlet.
1. For Siphon Feed, attach siphon feed cup to bottom
inlet of Fluid Body Assembly.
2. For Gravity Feed, loosen U-58 Nut and then turn
fluid inlet of Fluid Body Assembly to top of Spray
Gun and connect Gravity Feed Cup. Tighten U-58
Nut.
3. Pressure Fluid Feed operation requires that you
attach one end of fluid hose to approved ASME
pressure tank and the other end to the fluid inlet on
the Fluid Body Assembly (Recommended Method).
MATERIAL:
1. Mixture should be to the consistency
recommended by the manufacturer.
2. Strain all materials through a cloth or fine wire mesh prior
to using to insure all foreign particles have been removed.
SPRAY HEAD:
1. CFH- Spray Head (Fan Pattern) (HIGH VOLUME
LOW PRESSURE) has maximum head pressure of
10 P.S.I. when controlled line pressure does not
exceed 50 P.S.I. and requires the use of a U-3609
Inlet Tube.
OPERATION:
Adjust 200-17 Fluid Knob on CUHF- (Bottom Air Inlet)
Models to regulate the flow of material through the Spray
Gun.
Grip Spray Gun as you would a pistol, place two fingers
on the trigger. The first one quarter inch of pull releases air
only and is used for cleaning by dusting surfaces before
painting. Continued pull on the trigger retracts the Fluid
Needle and allows maximum fluid passage.
Begin Painting by applying as light a coat as possible.
Take long strokes from side to side, releasing the trigger
at the end of each stroke. For average work, hold head of
Spray Gun 8 to 10 inches from the surface to achieve fan
patterns from 3 to 10 inches in width. For narrow fan
patterns, use short trigger pull and hold Spray Gun closer
to the surface. To get wider fan pattern, draw Spray Gun
away from surface gradually while trigger is pulled back
until desired width of pattern is obtained. Practice before
spraying on your project is always advisable.
CARE AND CLEANING:
Flush clean solvent through the fluid passages of the
Spray Gun and wipe off the outside. Never leave the entire
Spray Gun immersed in solvent or the leather packings will
dry out. Dirty Aircaps and Tips should be cleaned out by
soaking in solvent and then blown clean with air. Never use
wire objects to ream out the holes in aircaps or tips as this
will damage these items. Always follow safety instructions
on cleaning solvents being used and remember to keep
your containers closed in a safe location.
Paasche Airbrush Company
4311 North Normandy Avenue
Chicago, IL 60634-1395
Phone: 773-867-9191 • Fax: 773-867-9198
Website: paascheairbrush.com
E-Mail: info@paascheairbrush.com
Printed in the U.S.A.
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CUHF- Spray Gun
CUHF-(HVLP) Spray Gun Components
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No.Part No. Description
1. U-2-3/8 Needle §
2. CUH-7B Fluid Body (Available in Stainless)
U-3500 Packing Set
8. U-28-12 Packing Washers (4)
9. U-29 Packing Gland
10. DU-30 Spring §
11. U-31 Spring Seat
12. U-33 Spring §
UH-1858-1/4 Handle & Shell Assembly (Items 13 thru 31)
13. U-2153 Retaining Ring
14. U-58 Nut §
15. U-755 Link Sleeve
16. U-828 Hook
17. U-856 Trigger & Hook Screw §
18. U-2154A Shell Assembly
19. U-762 Air Valve Piston §
20. U-2520P Air Valve Head
21. U-2500 Spring §
U-2106B Fluid Control Assembly
22. U-3631 Plunger
23. U-2750 Packing Gland
24. AE-43 “O” Ring
25. U-2069B Rear Cap
26. 200-17 Fluid Knob
27. U-1702 Valve Spring
28. U-1322A Link Assembly §
29. U-35 Trigger Link Screw §
30. U-1671 Trigger §
31. U-1890P Plastic Handle (Polypropylene)
32. U-3609 Air Inlet Tube (Required for CUHF-Model)
59-28 TEFLON Packing Assembly (Optional)
No. Part No. Description
38. U-3353 Packing PTFE (1)
39. 59-24 Packing PTFE (2)
40. 59-25B Packing Expander (1)
41. DU-30 Spring §
SPECIAL TIPS & NEEDLES
• US- 2 or 4 Self Cleaning Tip §
(Select Size)
US-2-2-3/8 Self Cleaning Needle
US-4-2-3/8 (Match Tip Size) §
Self Cleaning feature clears tip orifice everytime needle is pulled
back for spraying.
NOTE: Symbol (§) denotes Stainless Steel Parts.
CONTAINERS: 30SC, 34SC,
31SC, 35SC and 52P - other sizes available call for Bulletin.
Spray Head L/Needle (HVLP) (Required for CUHF-)
• Head Sizes: 000, 00, 0, 2 or 4
33. 56FA- Fan Aircap: 000, 00, 0-use 56FA-4-12,
2 uses 56FA-4-15 and 4 uses 56FA-4-20-3
34. U-2861 Spring §
35. U-3611 Sleeve (Required for HVLP)
36. U-1649 Aircap Nut
37. U- Stainless Tip (Select same size as Head)
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