Corken 91 - Page 84

5
6
7
8
Crosshead
assembly
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3
9
2
1
Appendix E—Parts Details for 691 and F691 Piston Assembly
Piston—Bill of Materials
Piston Diameter 4.5" (11.43 cm)
Ref
No.
Part No. Description Qty.
1.
7002-025TP125A Screw (socket head) 16
7207-025A Lock washer 16
2. 1987 Head, iron 2
3. 1740 Ring expander 6
4. 1739 Piston ring 6
5. 1482 Locknut 2
6. 1483 Lock pin 2
7.
1735 Shim washer (thick)
As
Req.
1735 -1 Shim washer (thin)
8. 1986 Piston platform 2
Ref
No.
Assembly
Number
Assembly Name Qty.
9. 1987-X1 Piston assembly 2
Piston Clearance (Cold)
a
Model Minimum Maximum
691 0.025" (0.64 mm) 0.040" (1.02 mm)
a
The distance from the bottom of the head to the top of the piston.
WARNING
CAUTION: Always relieve pressure in the unit before attempting
any repairs.
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