PLATE 3904917 - Caterpillar

Disassembly
A wall should be used to separate the pump and motor area from the rest of the shop. A key concept of the rebuild facility is to separate the dirty areas from the clean areas, therefore a divider is necessary. An added benefit of the divider is to reduce the noise in the component area. Column mounted jib cranes can be used, but freestanding jib cranes offer greater reach and provide better coverage of the area. The disassembly bench should have the means to handle various sizes of pumps and be able to collect residual oil that must be drained. A sump tray may be used if there is a way to pump out the tray. Worktable drains offer the advantage of making cleaning easier. Refer to Tool Catalog, PECJ0003, "Cat Hand Tools and Shop Supplies", for large-scale tooling required for the disassembly and assembly area. You may also contact Cat Dealer Service Tools for tooling recommendations that are required to handle gear pump Disassembly and Assembly.A technician should be able to identify incoming pumps by the tag on the pump. The tag should contain the work order number. The work order should be placed on a job board. A hanging file folder works well. A supervisor or a lead person should place the work orders of priority for quick technician retrieval.The same hoist should be able to move the pump from the incoming rack to the Disassembly and Assembly (D&A) bench. The procedure for disassembling each gear pump may vary between different pumps. Refer to the Disassembly and Assembly procedure for the individual pump. The disassembly procedure can be found on SIS Web or ordered through the Caterpillar Media Logistics System.Inspection
After the disassembly procedure has been completed, an inspection of the individual pump parts must be conducted. Measurements of the gear diameters and bearing bores should be taken and compared to the specifications in Special Instruction, SEBF8161, "Hydraulic Gear Pumps Used in Transmissions" or Special Instruction, SEBF8073, "Specifications and Reusability for Hydraulic Gear Pumps and Motors". Depending on the pump, one of the Special Instruction documents can be useful in determining the reusability of the components. Be sure to check for stress risers and scratches that can carry contamination. Fine scratches can be hard to see, so hand washing the individual parts in a solvent washer can aid with better quality reuse decisions. The specifications for the individual pumps can be found on SIS Web or ordered through the Caterpillar Media Logistics System. Repair decisions should be made depending on the dealer capability and customer preference. Depending on the situation, a dealer exchange may be a viable option. Minor repairs may only require installing a new seal kit. Major repairs may require ordering new parts.Parts Ordering
Immediately following the inspection, parts should be ordered. The technician should order parts electronically on a terminal in the pump shop. The parts list can be generated in SIS Web or HIS and ordered with DBS Parts Integrator. Placing the parts list