5
6
7
8
9
Crosshead
assembly
4
3
2
1
Appendix E—Parts Details for 91 and F91 Head and Valve Assembly
Piston—Bill of Materials
Piston Diameter 3" (7.62 cm)
Ref
No.
Part No. Description Qty.
1.
7002-010TP100A Screw (socket head) 4
7207-010A Lock washer 4
2. 1983 Head (iron) 1
3. 1775 Ring expander 3
4. 1772 Piston ring 3
5. 1482 Locknut 1
6. 1483 Lock pin 1
7. 1984 Piston platform 1
8.
1528 Shim washer (thick)
As
Req.
1528 -1 Shim washer (thin)
As
Req.
9. 1527 Thrust washer 1
Piston Clearance (Cold)
a
Model Minimum (x) Maximum (x)
91 0.020" (0.51 mm) 0.044" (1.12 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.
60
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