- Multi Terrain Loader:
- 287B (S/N: ZSA1-UP)
- Skid Steer Loader:
- 248B (S/N: SCL1-UP)
- 277C (S/N: JWF1-UP)
- 287C (S/N: MAS1-UP)
- 297C (S/N: GCP1-UP)
- 268B (S/N: LBA1-UP)
- 246C (S/N: JAY1-UP)
- 256C (S/N: DWS1-UP)
- 262C (S/N: MST1-UP)
- 272C (S/N: RED1-UP)
Description of Change:
ReferenceOperation and Maintenance, SEBU7731, "216B, 226B, 232B, 236B, 242B, 246B, 248B, 252B, 262B, and 268B Skid Steer Loaders"
ReferenceOperation and Maintenance, SEBU7732, "247B, 257B, 267B, 277B, and 287B Multi Terrain Loaders"
ReferenceOperation and Maintenance, SEBU8019, "246C, 256C, 262C, and 272C Skid Steer Loaders"
ReferenceOperation and Maintenance, SEBU8020, "277C, 287C, and 297C Multi Terrain Loaders"
ReferenceDisassembly and Assembly, RENR8748, "248B and 268B Skid Steer Loaders Machine Systems"
ReferenceDisassembly and Assembly, RENR4888, "267B, 277B, and 287B Multi Terrain Loaders Machine Systems"
ReferenceDisassembly and Assembly, KENR5116, "246C, 256C, 262C, and 272C Skid Steer Loaders Machine Systems"
ReferenceDisassembly and Assembly, KENR5198, "277C, 287C, and 297C Multi Terrain Loaders Machine Systems"
ReferenceTesting and Adjusting Manual, RENR8747, "248B and 268B Skid Steer Loaders Machine Systems"
ReferenceTesting and Adjusting Manual, RENR4887, "267B, 277B, and 287B Multi Terrain Loaders Machine Systems "
ReferenceTesting and Adjusting Manual, KENR5113, "246C, 256C, 262C, and 272C Skid Steer Loaders Machine Systems "
ReferenceTesting and Adjusting Manual, KENR5196, "277C, 287C, and 297C Multi Terrain Loaders Machine Systems"The margin pressure adjustment plug has been improved. The machining of the plug has been refined in order to reduce the possibility of oil leaks at the pump control valve.
Adaptable To: The effectivity and the adaptability of the improved 307-3049 Adjustment Plug are listed in Table 1.
| Machine | Effectivity | Adaptability |
|---|---|---|
| 248B | - | (S/N: SCL1-UP) |
| 268B | - | (S/N: LBA1-UP) |
| 287B | - | (S/N: ZSA1-UP) |
| 246C | (S/N: JAY1011-UP) | (S/N: JAY1-1010) |
| 256C | (S/N: DWS656-UP) | (S/N: DWS1-654) |
| 262C | (S/N: MST910-UP) | (S/N: MST1-909) |
| 272C | (S/N: RED786-UP) | (S/N: RED1-785) |
| 277C | (S/N: JWF643-UP) | (S/N: JWF1-642) |
| 287C | (S/N: MAS600-UP) | (S/N: MAS1-599) |
| 297C | (S/N: GCP646-UP) | (S/N: GCP1-645) |
Replacing the Margin Pressure Adjustment Plug
- Raise the cab. Refer to Operation and Maintenance, "Cab Tilting - Tilting the Cab Upward".
- Pull a vacuum on the hydraulic tank in order to minimize loss of hydraulic oil.
- Locate the pump control valve (1) on the high flow pump. Loosen setscrew (2). See Illustration 1.
 | |
| Illustration 1 | g01524164 |
- Note the installed depth of the margin pressure adjustment plug (3) inside the pump control valve. This will be helpful in order to minimize the amount of adjustment that is needed after installing the replacement margin pressure adjustment plug.
- Remove the margin pressure adjustment plug (3). Ensure that the springs and the internal components remain in place inside the valve.
- Install the replacement plug into the pump control valve. Ensure that the O-ring seal and the backup ring are in place on the plug before you install the plug. Screw the plug into the pump control valve to the installed depth of the former plug.
- Set the margin pressure and the high pressure cutoff. Refer to Testing and Adjusting, "High Flow Hydraulic System - Test and Adjust - If Equipped".
When you have completed the adjustments, hold adjustment plug (3) in position and tighten set screw (2) to a torque of 9.15 ± 1.65 N·m (6.75 ± 1.2 lb ft).
Note: Do not overtighten the set screw.
- Lower the cab. Refer to Operation and Maintenance, "Cab Tilting - Tilting the Cab Downward".