YAMADA NDP-20 series, Maintenance Manual

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Table of Contents
·
Warnings and Cautions
·
Table of Contents
1. Principles of operation
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2. Tools, etc.
2.1 General tools ················································································ 1
2.2 Special tools ················································································· 1
2.3 Misc. ·························································································· 1
3. Ordering Replacement parts
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4. Balls and Valve seats
4.1 Removal
■
BA
□
[-D], BS
□
, BF
□
types ···························································· 2
■
BP
□
, BV
□
types ·········································································· 3
4.2 Inspection ··················································································· 4
4.3 Installation ·················································································· 4
5. Diaphragm and Center rod
5.1 Removal
■
BA
□
[-D], BS
□
, BF
□
types ···························································· 5
■
BP
□
, BV
□
types ·········································································· 5
5.2 Inspection ··················································································· 6
5.3 Installation
■
B
□
C[-D], B
□
N[-D], B
□
E, B
□
V, B
□
H[-D], B
□
S, B
□
H/T types ············ 7
■
B
□
T[-D] types ············································································· 7
6. Throat bearing and Pilot valve Assembly
6.1 Removal ······················································································ 8
6.2 Inspection ··················································································· 8
6.3 Installation ·················································································· 8
7. C Spool Valve Assembly and Sleeve Assembly
7.1 Removal ······················································································ 9
7.2 Inspection ··················································································· 9
7.3 Installation ·················································································· 9
8. Retightening of Tie rods
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