Maintenance
309856A
23
Table 1: Impingement Port Cleanout Drill Sizes
Standard Round Polycarballoy Mix Modules
Polycarballoy
Mix Module
Part No.
No. of
Impinge-
ment Ports
Impingement Port Drill
Counterbore Drill
Drill Size
(nominal)
Drill Diameter
in. (mm)
Drill Size
(nominal)
Drill Diameter
in. (mm)
MR3535
2
#73
.0240 (0.61)
N/A
N/A
MR4747
2
#67
.0320 (0.81)
N/A
N/A
MR5757
3
#67
.0320 (0.81)
N/A
N/A
MR6666
4
#67
.0320 (0.81)
N/A
N/A
MR8282
4
#60
.0400 (1.02)
N/A
N/A
MR9494
4
#56
.0465 (1.18)
N/A
N/A
Standard Flat Polycarballoy Mix Modules
No. of
Impinge-
ment Ports
Impingement Port Drill
Counterbore Drill
Drill Size
(nominal)
Drill Diameter
in. (mm)
Drill Size
(nominal)
Drill Diameter
in. (mm)
MF1818
1
#77
.0180 (0.46)
#67
.0320 (0.81)
MF2929
1
#69
.0292 (0.74)
N/A
N/A
MF3535
2
#73
.0240 (0.61)
N/A
N/A
MF4747
2
#67
.0320 (0.81)
N/A
N/A
MF5757
3
#67
.0320 (0.81)
N/A
N/A
Direct Impingement Round Polycarballoy Mix Modules
Polycarballoy
Mix Module
Part No.
No. of
Impinge-
ment Ports
Impingement Port Drill
Counterbore Drill
Drill Size
(nominal)
Drill Diameter
in. (mm)
Drill Size
(nominal)
Drill Diameter
in. (mm)
XR2929
1
#69
.0292 (0.74)
N/A
N/A
XR3535
2
#73
.0240 (0.61)
N/A
N/A
XR4747
2
#67
.0320 (0.81)
N/A
N/A
XR5757
3
#67
.0320 (0.81)
N/A
N/A
Direct Impingement Flat Polycarballoy Mix Modules
Polycarballoy
Mix Module
Part No.
No. of
Impinge-
ment Ports
Impingement Port Drill
Counterbore Drill
Drill Size
(nominal)
Drill Diameter
in. (mm)
Drill Size
(nominal)
Drill Diameter
in. (mm)
XF1313
1
#81
.0130 (0.33)
#67
.0320 (0.81)
XF1818
1
#77
.0180 (0.46)
#67
.0320 (0.81)
XF2929
1
#69
.0292 (0.74)
N/A
N/A
XF3535
2
#73
.0240 (0.61)
N/A
N/A
XF4747
2
#67
.0320 (0.81)
N/A
N/A
XF5757
3
#67
.0320 (0.81)
N/A
N/A