- 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)
Description of Change: The improved centershift lock group has been released that contains a new cylinder. The new cylinder has a counter bore machined in that allows for the spacer to be installed. The spacer will prevent the bushing from walking out and damaging the sensor.
To prevent the bushing from walking out, the new cylinder and spacer can be installed on current machines. As an alternative solution, the current cylinder can be removed and machined to allow for installation of the spacer as in the rework procedure.
Adaptable To:
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| Illustration 1 | g03514517 |
The new 431-8801 Cylinder (1) replaces the former 297-6979 Cylinder in the 164-8462 Centershift Lock Gp .
The new 431-8801 Cylinder (1) and 384-7727 Spacer (2) are adaptable and effective in production with the machines that are listed in Table 1.
| Sales Model | Adaptable To | Effective With |
| 120K | S/N:JAP1-4675 S/N:SZN1-1717 |
S/N:JAP4676-UP S/N:SZN1718-UP |
| 120K Series 2 | S/N:SZS1-488 | S/N:SZS489-UP |
| 12K | S/N:JJA1-3041 S/N:SZP1-416 |
S/N:JJA3042-UP S/N:SZP417-UP |
| 140K | S/N:JPA1-3270 S/N:SZL1-2152 |
S/N:JPA3271-UP S/N:SZL2153-UP |
| 140K Series 2 | S/N:SZW1-158 | S/N:SZW159-UP |
| 160K | S/N:JBP1-153 S/N:SZM1-538 |
S/N:JBP154-UP S/N:SZM539-UP |
Rework procedure for the current 297-6979 Cylinder
| Required Parts List | |||
| Item | Qty | Part Number | Description |
| 2 | 1 | 384-7727 | Spacer |
| 3 | 1 | 9D-6584 | Lip Type Seal |
| 4 | 1 | 167-2307 | U-Cup Seal |
| 5 | 1 | 4T-8054 | Seal As |
| 6 | 1 | 2H-3931 | O-Ring Seal |
| 7 | 1 | 3J-1907 | O-Ring Seal |
| 8 | 1 | 9D-3311 | Bushing |
| 9 | 1 | 3E-3636 | Ball Switch |
- Ensure that the machine is parked for service.
Refer to Troubleshooting, "Machine Preparation for Troubleshooting" for your machine.
- Remove the centershift lock.
Refer to Disassembly and Assembly, "Centershift Lock - Remove" for your machine.
Note: Remove the centershift lock. Do not remove the centershift lock bar.
- Machine the face of cylinder (A) to dimensions (B), (C), and radius of 0.8 ± 0.2 mm (0.03 ± 0.01 inch). Refer to Illustration 2. Ensure that the machining is centered on the cylinder housing in relation to the existing bore for the pin.
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| Illustration 2 | g03514484 |
(B) Diameter is 81.0 ± 0.2 mm (3.19 ± 0.01 inch) (C) Depth is 5.5 ± 0.5 mm (0.22 ± 0.02 inch) | |
- Ensure cylinder (A) is properly cleaned after the machining is completed.
- Assemble the centershift lock. Ensure to use new O-ring seal (6), seal as (5), lip type seal (3), and U-cup seal (4). Refer to Disassembly and Assembly, "Centershift Lock - Assemble" for your machine.
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| Illustration 3 | g03514516 |
- Install one spacer (2) to the face of the centershift lock.
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| Illustration 4 | g03516560 |
- Install new bushing (8) onto the centershift lock.
- Install the centershift lock to the machine. Refer to Disassembly and Assembly, "Solenoid Valve (Centershift Lock) - Remove and Install" for your machine.
- Install new ball switch (9). Be sure to use new O-ring seal (7) when installing the new ball switch.
- Ensure that the hydraulic oil level is correct. Refer to Operation and Maintenance Manual, "Hydraulic System Oil Level - Check" for your machine.