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Maintenance & Servicing
Safety Valve 5
5-13
1
3
5
11
2
12
13
14
4
4
6
5
8
9
7
10
gjn36.eps
Figure 5-6. System Selector Valve
Table 5-6. System Selector Valve - Parts List
Item Description Part Item Description Part
1 Set Screw 3927102 8 Valve Rotor 3921856
2 Knob
3927125
9 Screw 3908867
3 Valve Shaft 3921842 10 Bonded Seal 3921935
4 Pin 3906008 11 Connector 3868081
5 Bearing 3905259 12 Support Bracket 3921492
6 Valve Body 3921839 13 Screw 2687927
7 O-Ring 3905713 14 Spring Plunger 3921874
Safety Valve
Disassembly
1. Unscrew safety plug (3) from the vacuum body (7), taking care not to lose the
bonded seal (6).
2. Carefully hold the larger “head” of the safety valve (1), and remove screw (5) and
valve stop (4).
3. Withdraw safety valve (1) from safety plug (3), and inspect O ring (2) for cleanliness
or signs of damage—replace as necessary.
Re-Assembly
Reassembly is the reverse of the above disassembly instructions, taking care that all
sealing surfaces are clean and undamaged.
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