Kremlin-Rexson AIRMIX MX 120 LT User manual

SPECIFICATIONS
AIRMIX GUN
MODEL MX 120 LT
Manual : 0510 573.044.212
Date : 21/10/05
Supersede : 15/09/03
Modif. : + note (page 1)
ADDITIONAL DOCUMENTATIONS
SPARE PARTS : GUN, MX 120 LT (Doc. 573.309.050)
KREMLIN REXSON – Site de Stains : 150, avenue de Stalingrad
93 245 - STAINS CEDEX - FRANCE
Téléphone : 33 (0)1 49 40 25 25 Fax : [phone]

KREMLIN Page 1 Manual : 573.044.212
SPECIFICATIONS
AIRMIX MANUAL GUN - MODEL MX 120 LT
1. TECHNICAL FEATURES
TECHNICAL FEATURES GUN MX 120 LT OPTIONAL
Air supply pressure 6 bar / 87 psi max.
Fluid supply pressure 120 bar / 1740 max. ⇒90 bar / 1305 psi (refer to § 3)
⇒200 bar / 2900 psi (refer to § 3)
Flow (refer to Doc. 573.309.050)
Weight 655 g / 144.36 lb
Use maximum temperature 50° C / 106° F
Air consumption 3 to 5 m3/h / 1.8 to 2.9 cfm
Wetted parts Stainless steel
Seat (removal) Stainless steel Polyacetal (90 bar / 1305 psi)
Fluid fitting (1) M 1/2 JIC / # 5 JIC
Air fitting (2) M 1/4 NPS
Trigger Flexible
Filter (3) with screen n° 6 Mounted on protective tube
Parts supplied with the gun :
-1 polyacetal seat (for use of gun at 90 bar / 1305 psi - refer to § 3)
-1 spring support, 1 spring, 1 needle stop "200 b" (for use of gun at 200 bar / 2900 psi - refer to § 3)
Note : For HVLP compliance, the maximum inlet air pressure at the gun handle must not exceed 15.5 psi
(1,07 bar) to maintain 10 psi (0,68 bar) or less at the air cap. Testing for HVLP compliance was performed
using the specified HVLP test air cap, the fan control fully closed and a pressure gauge on the air inlet fitting
at the gun handle. It may also be a requirement of some regulatory agencies that users have the appropriate
test air cap available on site to verify that the gun is being operated within the regulatory limitations.
2
1
3

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2. DISASSEMBLY
SEAT-HOLDER (15)
Remove air cap. With the wrench (52) supplied with
the gun, unscrew seat-holder (16).
Clean inside of the gun. If required, replace seat-
holder (refer to spare parts, ind. 15).
Unscrew seat retainer (18) from the seat assembly to
reveal the seat (17). Pry the seat out of the seat
recess and replace with a new seat.
Reinstall the seat as shown opposite (tightness cone
towards the needle). Do not forget the seal of the seat.
Reassemble in reverse order.
Before installing the seal (19), soak it in hot
liquid (water or oil) in order to make it
supple.
ÂScrew the seat holder with the wrench provided by respecting the torque indicated at
paragraph 4 : " Assembly instructions".
NEEDLE AND CARTRIDGE (21)
Remove seat-holder (15) as indicated previously.
Remove the trigger (42) by taking off screws (46) and spindle (45).
Remove pin packing (23).
With the wrench, unscrew the needle stop (14) with the spring (13) and its spring support (12).
By means of a round tool, push needle with packing (21) out of body bore.
If required, replace them (refer to spare parts).
Reassemble in reverse order.
ÂComply with spring support (12) orientation order depending on the spray gun model.
MX 120 LT spray gun
12
AIR VALVE ASSEMBLY (25)
Remove the trigger (42). By means of the wrench, unscrew air valve body and remove it with its spring
(30) and its seat (26).
If required, replace air valve assembly.
ÂIn the "AIR" servicing kit, take the new air valve mounted with MX valve rod (length : 50 mm / 2").

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FILTER REPLACEMENT (37)
Unscrew knurled nut (40) located at the gun material inlet.
Clean the filter, and by hand, unscrew the filter support (38).
Remove the microfilter (37), change it (refer to chart). Reassemble in reverse order.
Before reassemblying the different components, some precautions have to be taken :
-Clean all the parts with the appropriate cleaning solvent and a brush.
-Install new seals if it is necessary after having lubricated them with PTFE grease.
-Install new parts if it is necessary.
3. OPERATING OF THE MX 120 LT GUNS AT 90 BAR / 1,305 PSI OR 200 BAR /
2,900 PSI
MX 120 LT gun Modification of the gun
14 9
12
13
Position (ind. 12)
for 90 bar / 1,305 psi and 200 bar / 2,900 psi
12
Position 120 bar /
1,740 psi
MX 120 LT AT 90 BAR / 1,305 PSI
Replace the stainless steel seat (17) of the MX 120 LT with an acetal resin seat (supplied with the
gun).
Remove the needle stop (14) by means of the wrench supplied the gun.
Remove the spring (13) and the spring support (12).
ÂTurn the spring support (12).
Reassemble in reverse order.
MX 120 LT AT 200 BAR / 2,900 PSI
Remove the needle stop (14) with the wrench supplied with the gun.
Remove the spring (13) and the spring support (12).
Install the spring support (12), the spring (13) and the needle stop "200 b" (2,900 psi) (14) supplied with
the gun.
ÂComply with spring support (12) orientation order.

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4. ASSEMBLY INSTRUCTIONS
S 1
C 2
A1
A1
C 2
A1
A1
A1
A1
S 2
S 1
Index Instructions Description Part number
PTFE grease "TECHNILUB" grease
(10 ml) 560.440.101
Low strength - Aneorobic
Adhesive - Loctite 222
Glue bottle (50 ml) 554.180.010
Screwing torque : 9 - 11 Nm / 6.6 - 8.1 ft / lbf
Screwing torque : 24 Nm / 17.7 ft / lbf
C 2
A1
S 1
S 2