Service Repair Manual
304CR Mini Hydraulic
Product: MINI HYD EXCAVATOR
Model: 304 MINI HYD EXCAVATOR NAD
Configuration: 304CR Mini Hydraulic Excavator NAD00001-UP (MACHINE) POWERED BY S4L2 Engine
Disassembly and Assembly
304 Mini Hydraulic ExcavatorEngine Supplement and Machine Systems
Media Number -RENR6668-01
Publication Date -01/01/2004
Date Updated -19/01/2004
Travel Motor - Disassemble
SMCS - 4351-015; 79PC-015
Snap Ring Pliers
A. Remove the piston motor (travel). Refer to Disassembly and Assembly, "Piston Motor
(Travel) - Remove" in this manual.
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
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.
304CR Mini Hydraulic Excavator NAD00001-UP (MACHINE) POWERED BY S4L2...
Note: Put identification marks on the travel motor 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
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
1. Put an alignment mark across the section of the travel motor and the final drive for assembly
purposes. The parts must be reinstalled