Corken 91 - Page 92

Appendix E—Parts Details for D891 and FD891 Crosshead Guide
Crosshead Guide—Bill of Materials
Ref
No.
Part No. Description Qty.
1.
3922 Cylinder (model D891) 1
4851
Cylinder
(model FD891, Class 300 RF flange)
1
2. 2-246_
a
O-ring for cylinder 2
3. 3442 Pipe plug (1/4" NPT) 3
4. 7001-050NC175A
Bolt (hex head, 1/2"—13 x 1-3/4",
grade 5, model D891)
18
Bolt (hex head, 1/2"–13 x 1-3/4",
grade 5, model FD891)
14
5. 3793-2S
Flange
(inlet / outlet, model D891 only)
2
6. 2-231_
a
O-ring (flange, model D891 only) 2
7. 3253 Roll pin 1
8. 2405-1 Crosshead guide 1
9. 1761 Gasket (crankcase) 1
10. 1760 Gasket (inspection cover) 1
11. 1721 Inspection cover 1
12. 7012-010NC025B Bolt (phillip head, 10"–24 x 1/4") 10
13. 2-231_
a
O-ring 2
14. 2-238_
a
O-ring 2
a
_ denotes material code. See material code chart
for details.
b
Registered trademark of the DuPont company.
WARNING
CAUTION: Always relieve pressure in the
unit before attempting any repairs.
Material Code
A Buna-N
B Neoprene
®b
13
Valve openings
2
6 5 4
Valve openings
7
1
3
2
3
3
8
4
3
4
9
14
14
13
10
11
12
Packing barrels
and cartridges
(For parts details,
see D891 packing
assembly).
Valve openings
Valve openings
3
1
3
D891 Cylinder FD891 Cylinder
92