Replacement Parts List

36
Boiler Control Replacement Parts
McDonnell & Miller
B
OILER
C
ONTROLS
Series 851
Make-Up Water Feeders
Water Feeders – Make-Up
Components
Item Part Model Weight
Number Number Number Description lbs. (kg)
1 313600 37A-130 Float (includes item 2) 2.0 (0.9)
2 335400 847-26 Gasket 0.1 (.05)
3 352925 SA851-4 Bellows bracket assembly 1.5 (0.7)
4 312800 37-27 Gasket 0.1 (.05)
5* 342500 SA51-101-102 Valve & strainer kit 3.0 (1.4)
6 324435 37-101 Tetraseal O-ring 0.1 (.05)
7 347100 SA101-38 Strainer basket 0.7 (.32)
(includes item 6)
8 310452 CTRD-51 Cartridge & strainer kit 0.8 (.36)
9 335700 851-105 Float rod 0.3 (.14)
10 110000 2 Switch 1.0 (.05)
11 312600 37-20 Cover 0.1 (.05)
Series 851
1
9
4
4
3
6
7
5
8
10
11
Round Boss
Pilot Action Style
Pre August 1995
Hex Boss
Cartridge Style
After August 1995
* Units manufactured prior to August 1995 have a round
port pilot valve and a strainer assembly. These valve
and strainer assemblies can be replaced with the
current hex port cartridge valve and strainer assembly.
2