Appendix D—Piston Assembly Details (HG600/THG600 Series)
Piston Assembly—Bill of Materials
Ref .
No .
Description
Cylinder Diameter
2 .75"
3 .25"
4"
Part No .
Qty .
Part No .
Qty .
Part No .
Qty .
1.
Piston assembly (iron)
3889-X1
1
3525-X1
1
4365-X1 (light)
1
4292-X1 (heavy)
2.
Thrust washer
3730
2
3730
2
3730
2
3.
Shim washer (thick)
3603
As req.
3603
As req.
3603
As req.
Shim washer (thin)
3603-1
As req.
3603-1
As req.
3603-1
As req.
4.
Piston (iron)
3889
1
3525
1
4292
1
5.
Expander ring
1774
8
1757
4
1776
4
6.
Piston ring
3892
8
1756
4
3781
4
7.
Rider ring
3893
1
3574
1
3776
1
8.
Lock nut
3604
1
3604
1
3604
1
9.
Shim washer (thick)
3895
As req.
3731
As req.
3780
As req.
Shim washer (thin)
3895-1
As req.
3731-1
As req.
3780-1
As req.
10.
Piston cap (iron)
3890
1
3561
1
3773 (light)
1
4291 (heavy)
11.
Socket head cap screw
7002-025TP062A
6
7002-010TP100A
4
7002-025TP100A
4
12.
Loctite 620 tube
b
3812
1
3812
1
3812
1
Ref .
No .
Description
Cylinder Diameter
5"
6"
8"
Part No .
Qty .
Part No .
Qty .
Part No .
Qty .
1.
Piston assembly (iron)
5301-X1
–
3530-X1
1
3674-X1
1
Piston assembly
(aluminum)
5301-1X1
1
3530-1X1
1
3674-1X1
1
2.
Thrust washer
3730
2
3730
2
3730
2
3.
Shim washer (thick)
3603
As req.
3603
As req.
3603
As req.
Shim washer (thin)
3603-1
As req.
3603-1
As req.
3603-1
As req.
4.
Piston (iron)
5301
1
3530
1
3674
1
Piston (aluminum)
5301-1
1
3530-1
1
3674-1
1
5.
Expander ring
5326
6
1753
4
—
–
6.
Piston ring
5302
6
1752
4
3677
3
7.
Rider ring
5303
1
3573
1
3679
2
8.
Lock nut
3604
1
3604
1
3604
1
9.
Shim washer (thick)
5322
As req.
3625
As req.
3681
As req.
Shim washer (thin)
5322-1
As req.
3625-1
As req.
3681-1
As req.
10.
Piston cap (iron)
5325
1
3562
1
3680
1
Piston cap (aluminum)
5325-1
1
3562-1
1
3680-1
1
11.
Socket head cap screw
7002-025TP100A
4
7002-025TP100A
4
7002-025TP100A
8
12.
Loctite 620 tube
b
3812
1
3812
1
3812
1
a
Prior to serial number S/N FZ44175 uses 7002-010TP100A. Serial number FZ44175 and later use 7002-025TP100A.
b
Use Loctite retaining compound 620.
59
