Service Manual
Manufactured by Bersch & Fratscher GmbH
9
version 10/2008
OPTIMA 2100
10.2 Needle seal – inverted cup seal no. 1248 - 10 defectively
a.) Dismantle needle according to point 10.1.
b.) Dismantle trigger 1248-U4, by loosening trigger screw 1248-33; remove trigger axle 1248-17
c.) Screw out tightening nut 1240-9
d.) Pull out complete connection piece 1248-3 to the front
Attention!!
Between connection piece 1248-3 and gun body there are for sealing purposes
one o-ring 104 – 0018 and two sealings 1240 – 63.
e.) Unscrew packing gland 1248-12 , substitute distancing gland 1248-11 and
inverted cup seals 1248-10 with o-rings 104-0020.
f.) Mount the parts vice versa - please take care that packing gland 1248-12 is not tightened to strong.
(see illustration 4).
10.3 Valve seal
a.) Dismantle lever according to point 10.2. b)
b.) Turn out valve packing gland 1134-4 to the front
c.) Pull out valve packing gland seal 1133-42 to the front
d.) Insert new valve packing gland seal 1133-42
e.) Mount the parts vice versa
(see illustration 4)
10.4 Change of complete nozzle set no. 1248 – U8
a.) Adjust the pump pressure at 0 bar, release trigger 1248-U4 completely - pressure of hose relieves.
b.) Secure spray gun by a 90 ° clockwise rotation of the safety lever 1237-3
c.) Remove the lock nut 1248-4 by hand.
d.) Take off nozzle set 1248-U2 to the front side.
e.) Push out nozzle carrier from nozzle set backwards.
e.) Deposit nozzle carrier complete in cleaning fluid respectively install another nozzle carrier complete
according to these steps vice versa. (Cleaning needle for nozzle order-number 00345-44)
g) Replace if necessary , seal 1240-58.
h) Assembly in reverse order (see illustration 4)
10.5 Gesket devectively – sealing retaining screw complete no. 1248 – U5
a.) Adjust the pump pressure at 0 bar, release trigger 1248-U4 completely - pressure of hose relieves.
b.) Secure spray gun by a 90 ° clockwise rotation of the safety lever 1237-3.
c.) Remove the lock nut 1248-4 by hand.
d.) Take off nozzle set 1248-U2 to the front side.
e.) Release packing gland 1248-12.
f.) Unscrew breech ring cap 1240-7 and take off needle piece complete with springs and pressing discs,
pull out backwards.
g.) Unscrew sealing retaining screw by using socket wrench SW 10 and replace in connection with sealing
ring 1240-25. At the same time check the ball on needle piece 1248-U3
h.) Mounting of the parts according to these steps vice versa.
(see illustration 4)
11. Positive Pressure
For short positive pressures of 10 - 12 bar ( 143 – 170 psi ) at the air supply and higher pump pressures (above 250 bar
– 3.556 psi material pressure) there is no danger of the destruction of the high pressure spray gun.
Positive pressure in the material area are compensated by automatic release of the paint needle.
( Note: Leaving spraying material)
12. Workstation related sound pressure level
Technical equipment - total air adjustment 1248 - U6 on max. –
Measured values:
Round jet Flat jet
1,0 bar = 67 dB/A 1,0 bar = 69 dB/A
1,5 bar = 71 dB/A 1,5 bar = 74 dB/A
2,5 bar = 78 dB/A 2,5 bar = 79 dB/A
The measurements and datas are based on the following rules of the measuring technique:Regulation for equipment
safety law DIN 45635 Part 1/04.84
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