Maintenance
24 309550ZAP
6. Push mix chamber (19) back in position.
7. Follow the Attach Front End procedure, page 29.
8. Reattach fluid manifold (M). Reconnect air. Return
gun to service.
Lubrication
Liberally lubricate all o-rings, seals, and threads.
Lubricate threads and outside of lock ring (11). See
Lubricant for Gun Rebuild, page 43 to order lubricant.
Inspect the Mix Chamber and
Side Seal Cartridges
See Models, page 4, for available mix chamber sizes.
1. Follow the Pressure Relief Procedure, page 19.
2. Follow the Flush Gun procedure, page 20, to
remove residual chemical.
3. Remove fluid manifold (M). Leave air connected.
4. Disconnect gun air whip hose (V) from air line quick
coupler (D).
5. Follow the Remove Front End procedure, page 29.
6. Remove air cap (10) and retaining ring (9). Inspect
o-ring (3) inside retaining ring.
Table 2: Impingement Port Drill Bit Sizes
Mix Chamber
Part Number
Impingement Port (IP)
Drill Bit Size
in. (mm)
Counterbore
(CB) Drill Bit Size
in. (mm)
AR2020
#76, 0.020 (0.50)
#53, 0.060 (1.50)
AR2929
#69, 0.029 (0.70)
#53, 0.060 (1.50)
AR3737
#63, 0.037 (0.94)
N/A
AR4242
#58, 0.042 (1.00)
N/A
AR4747
#56, 0.0165 (1.18)
N/A
AR5252
#55, 0.052 (1.30)
N/A
AR6060
#53, 0.060 (1.50)
N/A
AR7070
#50, 0.070 (1.75)
N/A
AR8686
#44, 0.086 (2.15)
N/A
AF2020
#76, 0.020 (0.50)
#53, 0.060 (1.50)
AF2929
#69, 0.029 (0.70)
#53, 0.060 (1.50)
AF4242
#58, 0.042 (1.00)
N/A
AF5252
#55, 0.052 (1.30)
N/A
Non 1:1 Ratio Mix Chamber Kits
AR2232
#74, 0.023 (0.59)
#61, 0.032 (0.81)
#53, 0.060 (1.50)
AR2942
#58, 0.042 (1.07)
#69, 0.029 (.74)
#53, 0.060 (1.50)
AR3729
#63, 0.037 (0.94)
#69, 0.029 (.74)
#53, 0.060 (1.50)
AR2033
#76, 0.020 (.50)
#66, 0.033 (.84)
#53, 0.060 (1.50)
AR2942
#69, 0.029 (.74)
#58, 0.042 (1.07)
#53, 0.060 (1.50)
M
TI2543A
TI2540A
D
V
9
3
10
TI2424A