- Motor Grader:
- 120KSeries 2 (S/N: SZS1-UP)
- 120K (S/N: SZN1-UP; JAP1-UP)
- 12K (S/N: JJA1-UP; SZP1-UP)
- 140KSeries 2 (S/N: SZW1-UP)
- 140K (S/N: JPA1-UP; SZL1-UP)
- 160K (S/N: SZM1-UP; JBP1-UP)
ReferenceSystems Operation, SENR2065, "Air Dryer".
Description of Change: The new air dryer will reduce the amount of moisture that is collected in the air system. The new air dryer is installed on all K Series and K Series 2 Motor Graders during assembly and will have improved service life.
Adaptable To: The new 450-3729 Air Dryer Gp replaces the former 215-3005 Air Dryer Gp in the 303-2035 Air Dryer Gp and 311-2739 Air Dryer and Lines Gp .
The new 450-3729 Air Dryer Gp is adaptable and effective in production with the machines that are listed in Table 1.
| Sales Model | Adaptable To | Effective with |
| 120K | S/N:JAP1-5255 S/N:SZN1-1849 |
S/N:JAP5256-UP S/N:SZN1850-UP |
| 120K Series 2 | S/N:SZS1-488 | S/N:SZS489-UP |
| 12K | S/N:JJA1-3079 S/N:SZP1-430 |
S/N:JJA3080-UP S/N:SZP431-UP |
| 140K | S/N:JPA1-3500 S/N:SZL1-2336 |
S/N:JPA3501-UP S/N:SZL2337-UP |
| 140K Series 2 | S/N:SZW1-158 | S/N:SZW159-UP |
| 160K | S/N:JBP1-153 S/N:SZM1-546 |
S/N:JBP154-UP S/N:SZM547-UP |
Update to the 311-2737 Air Dryer Gp
In order to update the 311-2737 Air Dryer Gp, refer to Table 2 for the parts needed, Illustration 1, and Illustration 2. The 311-2737 Air Dryer Gp is used on the 12K, 140K, 140K Series 2 and 160K Motor Graders.
| Required Parts List for 311-2737 Air Dryer Gp | |||
| Item | Qty | Part Number | Description |
| 1 | 1 | 300-1377 | Wiring Harness |
| 2 | 1 | 9W-1442 | Fuse |
| 3 | 1 | 191-3645 | Reservoir |
| 4 | 1 | 301-3170 | Tube |
| 5 | 1 | 260-9133 | Plate |
| 6 | 1 | 450-3729 | Air Dryer Gp |
| 7 | 1 | 344-9192 | Hose As |
| 8 | 1 | 342-1548 | Hose As |
| 9 | 1 | 342-1547 | Hose As |
| 10 | 1 | 8I-1362 | Hose |
 | |
| Illustration 1 | g03517440 |
 | |
| Illustration 2 | g03517437 |
View of area A | |
Update to the 303-2033 Air Dryer Gp
In order to update the 303-2033 Air Dryer Gp, refer to Table 3 for the parts needed, Illustration 3, and Illustration 4. The 303-2033 Air Dryer Gp is used on the 120K and 120K Series 2 Motor Graders.
| Required Parts List for 303-2033 Air Dryer Gp | |||
| Item | Qty | Part Number | Description |
| 1 | 1 | 300-1377 | Wiring Harness |
| 2 | 1 | 9W-1442 | Fuse |
| 3 | 1 | 303-2348 | Tube |
| 4 | 1 | 327-0726 | Plate |
| 5 | 1 | 450-3729 | Air Dryer Gp |
| 6 | 1 | 191-3645 | Reservoir |
| 7 | 1 | 327-0727 | Plate |
| 8 | 1 | 8I-1362 | Hose |
| 9 | 1 | 342-1630 | Hose As |
| 10 | 1 | 327-0730 | Hose As |
| 11 | 1 | 327-0731 | Hose As |
 | |
| Illustration 3 | g03517456 |
 | |
| Illustration 4 | g03517457 |
View of area B | |