Service Repair Manual
Models
304.5 Mini Hydraulic
Excavator
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Product: MINI HYD EXCAVATOR
Model: 304.5 MINI HYD EXCAVATOR ANR
Configuration: 304.5 Mini Hydraulic Excavator ANR00001-UP (MACHINE) POWERED BY 3024 Engine
Disassembly and Assembly
304.5 Mini Hydraulic Excavator Machine Systems
Media Number -RENR3548-04
Publication Date -01/08/2008
Date Updated -18/08/2008
i01368358
Piston Pump - Disassemble
SMCS - 5070-015
Disassembly Procedure
Table 1
REQUIRED TOOLS
Tool
Part Number
Part Description
Qty
A
1P-1857
Snap Ring Pliers
1
B
1P-1859
Snap Ring Pliers
1
Start By:
A. Remove the piston pump. Refer to Disassembly and Assembly, "Piston Pump - Remove".
NOTICE
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, "Caterpillar Tools and Shop
Products Guide" for tools and supplies suitable to collect and contain
fluids on Caterpillar products.
Dispose of all fluids according to local regulations and mandates.
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Note: Put identification marks on the pump and on all lines for installation purposes. Plug all
lines. This will help to prevent fluid loss and this helps to keep contaminants from entering the
system.
Note: Cleanliness is an important factor. Before the disassembly procedure, the exterior of the
component should be thoroughly cleaned. This will help to prevent dirt from entering the internal
mechanism.
Illustration 1
g00722015
1. Remove allen head screw (1) .
2. Remove hub (2) from the shaft.
Illustration 2
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3. Remove collar (3) from the pump head.
4. Remove coupling (4) from the pump head.
5.