- Wheel Loader
- 924H (S/N: HXC1-UP; JTM1-UP; WEM1-UP; KLN1-UP; RRS1-UP; LKW1-UP)
- 924K (S/N: KW41-1103; ENC1-1566; HJF1-818; PWR1-4842; SNZ1-627)
- 926M (S/N: LTE1-3905)
- 930H (S/N: DHC1-UP; FTD1-UP)
- 930K (S/N: DYB1-486; EYE1-789; FRK1-515; RHN1-4484; TNY1-76)
- 930M (S/N: KTG3243-UP)
- 924K (S/N: KW41-1103; ENC1-1566; HJF1-818; PWR1-4842; SNZ1-627)
Introduction
This special instruction contains the procedure to rework the pressure relief fittings on the rear axle center housing and leg housings on certain 924H, 924K, 926K, 930H, 930K, and 930M Wheel Loaders.
Do not perform any procedure in this Special Instruction until you have read the information and you understand the information.
Reference Section
Reference: Specification, SENR3130, "Torque Specifications"
Reference: Disassembly and Assembly, KENR7606, "924H, 924HZ, 928HZ, and 930H Wheel Loaders Power Train"
Reference: Disassembly and Assembly, UENR0281, "924K, 930K, and 938K Wheel Loaders Power Train"
Reference: Disassembly and Assembly, UENR6558, "926M, 930M, and 938M Wheel Loaders Power Train"
Safety Section
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| Illustration 1 | g00104545 |
Attach a "Do Not Operate" warning tag or a similar warning tag to the start switch or to the controls before you service the equipment. These warning tags (Special Instruction, SEHS7332) are available from your Caterpillar dealer.
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Do not operate or work on this machine unless you have read and understand the instructions and warnings in the Operation and Maintenance Manuals. Failure to follow the instructions or heed the warnings could result in injury or death. Contact your Cat dealer for replacement manuals. Proper care is your responsibility. |
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Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting, and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids. Refer to Special Publication, NENG2500, "Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Cat® products. Dispose of all fluids according to local regulations and mandates. |
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Personal injury can result from hydraulic oil pressure and hot oil. Hydraulic oil pressure can remain in the hydraulic system after the engine has been stopped. Serious injury can be caused if this pressure is not released before any service is done on the hydraulic system. Make sure all of the work tools have been lowered to the ground, and the oil is cool before removing any components or lines. Remove the oil filler cap only when the engine is stopped, and the filler cap is cool enough to touch with your bare hand. |
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Personal injury or death can result from improperly checking for a leak. Always use a board or cardboard when checking for a leak. Escaping air or fluid under pressure, even a pin-hole size leak, can penetrate body tissue causing serious injury, and possible death. If fluid is injected into your skin, it must be treated immediately by a doctor familiar with this type of injury. |
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Personal injury or death can result from sudden work tool movement. Sudden movement of the work tool can cause injury to persons near the work tool. To prevent injury or death, make sure that the area around the work tool is clear of personnel and obstructions before operating the work tool. |
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Hot oil and hot components can cause personal injury. Do not allow hot oil or hot components to contact skin. |
Required Parts
| Required Parts | |||
|---|---|---|---|
| QTY | New Part Number | Part Name | Former Part Number |
| 1 | Plug | ||
| 1 | Pressure Relief Fitting | ||
Installation Procedure
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| Illustration 2 | g06209983 |
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(1) Poppet style
(2) Ball style | |
924H Rework Procedure for Rear Axle Housing.
Effected Housing Groups for 924H 203-2774 Oscillating Axle Housing Gp.
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| Illustration 3 | g06321584 |
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924H Rear axle (1) (2) | |
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| Illustration 4 | g06219238 |
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(A) (B) | |
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| Illustration 5 | g06321281 |
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(C) (D) Dimension for angle of drilled hole | |
- Remove 8T-0336 Pressure Relief Fitting ball style fitting from center housing and discard, see illustration 3 callout (1). Plug the hole with 5M-6214 Plug and tighten to
13 ± 4 N·m (115.06 ± 35.40 lb in.) - Install 8T-0336 Pressure Relief Fitting poppet style on the rear axle leg housing and tighten to
13 ± 4 N·m (115.06 ± 35.40 lb in,) see illustration 3 callout (2).Nominal diameter is 1/8 inch - 27 NPSF.
930H Rework Procedure for Rear Axle Housing.
Effected Housing Groups for 930H 234-4247 Oscillating Axle Housing Gp
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| Illustration 6 | g06321588 |
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930H Rear axle (1) (2) | |
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| Illustration 7 | g06219468 |
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(A) (B) | |
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| Illustration 8 | g06321282 |
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(C) (D) Dimension for angle of drilled hole | |
- Remove 8T-0336 Pressure Relief Fitting ball style fitting from center housing and discard, see illustration 6 callout (1). Plug the hole with 5M-6214 Plug and tighten to
13 ± 4 N·m (115.06 ± 35.40 lb in.) - Install 8T-0336 Pressure Relief Fitting poppet style on the rear axle leg housing and tighten to
13 ± 4 N·m (115.06 ± 35.40 lb in,) see illustration 6 callout (2).
924K / 926M Rework Procedure for Rear Axle Housing.
Effected Housing Groups for 924K / 926M 340-9858 Axle Housing Gp
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| Illustration 9 | g06321591 |
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924K / 926M Rear axle (1) (2) | |
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| Illustration 10 | g06219238 |
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(A) (B) | |
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| Illustration 11 | g06321281 |
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(C) (D) Dimension for angle of drilled hole | |
- Remove 8T-0336 Pressure Relief Fitting ball style fitting from center housing and discard, see illustration 9 callout (1). Plug the hole with 5M-6214 Plug and tighten to
13 ± 4 N·m (115.06 ± 35.40 lb in.) - Install 8T-0336 Pressure Relief Fitting poppet style on the rear axle leg housing and tighten to
13 ± 4 N·m (115.06 ± 35.40 lb in,) see illustration 9 callout (2).
930K / 930M Rework Procedure for Rear Axle Housing.
Effected Housing Groups for 930K / 930M 340-9900 Axle Housing Gp
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| Illustration 12 | g06321592 |
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930K / 930M Rear axle (1) (2) | |
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| Illustration 13 | g06219468 |
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(A) (B) | |
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| Illustration 14 | g06321282 |
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(C) (D) Dimension for angle of drilled hole | |
- Remove 8T-0336 Pressure Relief Fitting ball style fitting from center housing and discard, see illustration 12 callout (1). Plug the hole with 5M-6214 Plug and tighten to
13 ± 4 N·m (115.06 ± 35.40 lb in.) - Install 8T-0336 Pressure Relief Fitting poppet style on the rear axle leg housing and tighten to
13 ± 4 N·m (115.06 ± 35.40 lb in,) see illustration 12 callout (2).