Widoberg HDP-II Special User manual

High Velocity Spray Gun
type HDP-II Special, with high pressure hose and nozzle end
95 ( 107070)
High Pressure Hose
99 (101885)
Complete cartridge
___________________ 94
________________________ 74
_________________________________ 96

Spare parts list
Item no.
Description
Part no.
Item no.
Description
Part no.
Original WIDOBERG
High Velocity Spray Gun
Type HDP-II - Special
109991
87
Grub screw
101605
88
Body
101010
93
Bleed valve assembly
101346
94
Screw plug
102034
51
Banjo connection
101818
95
High pressure hose
107070
52
* Check valve assembly
101249
96
Insert assembly, conical
102108
53
Connection piece
101354
99
Complete Spray
Cartridge
101885
54
Sealing ring
101850
46
Cartridge body
101872
55
Stop cock
101826
* Piston guide, compl.
110124
56
Hose connection
111724
* Valve piston
110043
57
* Cup seal
101664
O-Ring
110035
58
* Usit sealing ring
101672
* Valve seat
101290
59
Cylinder flange
103128
Retaining nut
110027
60
Cylinder
111481
Teflon seal
111759
61
* Plunger
101150
Nozzle nut
110019
62
Strip ring
103136
63
* Compression spring
111457
64
* Flat seal for piston assembly
101648
65
Countersunk screw
101699
91
Standard Nozzle 0°
103004
66
Spindle
111511
91
Standard Nozzle 20°
103209
67
Cylinder cover
111503
91
Standard Nozzle 40°
103403
68
Retaining nut
111554
91
Standard Nozzle 65°
103659
69
Knurled knob
111538
91
Standard Nozzle 90°
103900
70
Flat head screw
111546
91
Standard Nozzle 120°
104000
71
Quick connection
111562
91
Barrel Nozzle 40°
105406
72
Sealing ring
111570
91
Barrel Nozzle 65°
105651
73
* O-ring
101702
91
Barrel Nozzle 90°
105902
74
O-ring
101613
91
Barrel Nozzle 120°
106011
75
* Piston assembly
111473
Parts marked with * should be kept in stock.

Installation
1. Mount gun on a support. Use 12 mm (15/32“) Ø hole in gun body.
2. Connect compressed air to quick connection no. 71.
Please use clean lubricated air.
3. Install 3-way control valve (minimum flow Ø, ¼”) as close as possible to the gun.
When using a 3–way solenoid valve, valve is “normally closed” when de-energized. Actuation of valve can
be made through an automatic timer or manually.
4. Connect material feed (compound hose) to connection no. 56. A dirt trap (strainer) in feed line is
recommended. Strainer mesh size: 30.
Start-up
1. Open material shut- off valve no. 55.
2. Open bleed valve nut no. 93 slightly until material emerges.
Or put the blade of a screwdriver to the groove of the nozzle nut no. 1 and press down the nozzle until
no air will come out. After the screwdriver has been removed, the system is closed automatically.
Please check that the position of the nozzle has not changed.
3. Actuate control valve to vent gun and then close bleed valve nut no. 93.
4. Adjust quantity of spray by means of knurled knob no. 69.
Care and maintenance
To avoid damaging seals, never immerse spray gun in hot water or aggressive cleaning fluids.
Clean dismantled nozzle with compressed air. Keep all moving parts clean and oil lightly when servicing.
Exchange of valve piston no. 6
Remove retaining nut no. 3. Extract valve piston no. 6 with a pincer and press in the new valve piston by
hand.
Replacement of plunger no. 61
Unscrew retaining nut no. 68 (at air connection end) and remove complete cylinder cover no. 67. Pull out
complete piston assembly no. 75 including plunger no. 61.
Unscrew countersunk screw no. 65 and push out plunger no. 61 from piston assembly no. 75. When
reassembling, tighten screw firmly and secure threads with a locking fluid.
Changing of nozzle
Unscrew retaining nut No. 92 and remove nozzle and valve seat no. 90.

Tips for trouble shooting
No compound emerges from nozzle
Insufficient air pressure: increase to 75 –90 p.s.i
Gun not properly vented
Open bleed valve assembly no. 93 to vent, or put the blade of a screwdriver to the groove of the nozzle nut
no. 1 and press down the nozzle until no air will come out.
Nozzle blocked
Remove nozzle and clean.
Check valve no. 52 binds or leaks
Clean or replace.
Strainer in dirt trap blocked
Remove and clean.
Material hardened in feed line
Clean line and stop cock no. 55.
Plunger no. 61 binds, does not retract
Replace compression spring no. 63 or
piston assembly no. 75 and/or cup seal no. 57.
Gun dribbles
Valve piston no. 6, valve seat no. 4 or complete piston guide no. 7 could get worn out. Replace these parts.
When using buffing compound
To obtain trouble free operation and minimum rate of wear, use airless compositions suitable for high pressure
applications.
We reserve the right to make changes for the purposes of improvements and technical progress.