- Articulated Truck:
- 725 (S/N: AFX1-UP; B1L1-UP)
- 730 (S/N: AGF1-UP; B1M1-UP)
- 735 (S/N: AWR1-UP; B1N1-UP)
- 740 (S/N: AXM1-UP; B1P1-UP)
- D250ESeries II (S/N: 4PS1-UP)
- D300ESeries II (S/N: 5KS1-UP)
- D350ESeries II (S/N: 2XW1-UP)
- D400ESeries II (S/N: 8PS1-UP)
Description of Change: Improved hoist cylinders are used on the listed machines. The new hoist cylinders incorporate an improved piston design that uses an additional wear ring and a placement of the seals that is more balanced. The new piston assemblies will improve the longitudinal strength of the hoist cylinders.
Adaptable To: The new hoist cylinders that are listed in Table 1 replace the former hoist cylinders that are listed in Table 2 for the listed machines. The new piston assemblies that are listed are direct replacements of the former piston assemblies that are used in the former hoist cylinders.
| New Hoist Cylinders | ||
|---|---|---|
| Model | Hoist Cylinder | Piston |
| 725 D250E Series II |
285-4031 | 283-8467 |
| 730 D300E Series II |
285-4032 | 283-8468 |
| 735 D350E Series II |
285-4033 | 283-8469 |
| 740 D400E Series II |
285-4034 | 283-8470 |
| Former Hoist Cylinders | ||
|---|---|---|
| Model | Hoist Cylinder | Piston |
| 725 | 241-4071 | 141-4338 |
| D250E Series II | 141-4335 | |
| 730 | 241-4062 | 141-4344 |
| D300E Series II | 141-4341 | |
| 735 | 241-4065 | 143-7682 |
| D350E Series II | 143-7678 | |
| 740 | 241-4068 | 141-6673 |
| D400E Series II | 141-6667 | |
The new hoist cylinders are direct replacements of the former hoist cylinders on all earlier machines.
The new piston assemblies are direct replacements of the former piston assemblies in the former hoist cylinders. When you order a former piston, a new piston and one wear ring will be shipped. Refer to Table 3.
| Replacement Piston Information | ||
|---|---|---|
| Model | Former Piston | Replacement Piston and Wear Ring |
| 725 D250E Series II |
141-4338 Piston | 283-8467 Piston 4J-3745 Wear Ring |
| 730 D300E Series II |
141-4344 Piston | 283-8468 Piston 4J-4630 Wear Ring |
| 735 D350E Series II |
143-7682 Piston | 283-8469 Piston 4J-4630 Wear Ring |
| 740 D400E Series II |
141-6673 Piston | 283-8470 Piston 4J-4606 Wear Ring |
Note: When a new piston is ordered, an additional wear ring will be shipped with the new piston. This ensures that sufficient wear rings are present for the assembly of the hoist cylinder.
 | |
| Illustration 1 | g01273397 |
A typical arrangement of seals on the former piston (1) Piston (2) Seal (3) Wear ring | |
Former pistons (1) use an arrangement of one seal (2) and two wear rings (3). Refer to Illustration 1.
 | |
| Illustration 2 | g01273398 |
A typical arrangement of seals on the new piston (1) Piston (2) Seal (3) Wear ring | |
New pistons (1) use an arrangement of one seal (2) and three wear rings (3). Refer to Illustration 2.
When you service a new hoist cylinder or a former hoist cylinder that is installed with a new piston, use three new wear rings instead of two wear rings.