Name: Link-Belt 235X3 Service Manual with Wiring Diagrams
Author: Link-Belt

Pulling a travel motor or rebuilding a lower roller goes smoother with all 286 pages of this Link-Belt 235X3 service manual PDF (OEM ID 15955044-0) open beside you. It's written for the X3 generation hydraulic excavator in both standard and Blade versions. Hydraulic circuit explanations fill nearly a third of the book, tracing flow through the travel, swing, boom, arm, bucket and negative control circuits before moving into breaker, double-acting and multi-purpose option circuits. Undercarriage work gets the same attention, from track shoe and sprocket removal to roller, take-up roller and center joint rebuilds built around jig dimension diagrams, and the travel motor teardown ends in its own troubleshooting chart. Set main relief at 34.3 MPa (4974 psi), and expect the travel motor to switch to second speed at 25.8 MPa (3742 psi). A travel motor that won't shift up can cost a whole shift. Bookmarks take you to the section you need in one click, and the text layer finds a term like drain volume instantly.

What's Inside This Manual

System	Pages	Key Topics
Specifications	6	Variable Displacement Piston Motor, Planetary Gear 2-Stage Reduction Gear, Grease Cylinder Type (with Cushion Spring)
Main Equipment Table	7-10	235X3, Automatic 2-Speed Switchover with Parking Brake, Relief Valve Set Pressure, Mounting Length of Spring
Main Equipment Structure and Operation Explanation	11-25	Travel Motor Operation, Crossover Relief Valve, Automatic 2-Speed Switchover Mechanism
Port Diagram	26	Travel Motor, Center Joint
Basic Functions	27-30	Travel Speed Selection, Travel Alarm
Removal and Installation of Track	31	Grease Cylinder Check Valve, Track Shoe Tension, Shoe Assembly
Removal and Installation of Shoe Assembly	32-35	Removal of Shoe Assembly, Installation of Shoe Assembly, Track Shoe Tension, Striking Rod, S-Pin, Master Pin, Box Wrench
Removal and Installation of Shoe Plate	36	Removal of Shoe Plate, Installation of Shoe Plate, Tightening Torque
Removal and Installation of Roller	37-55	Removal and Installation of Upper Roller
Removal and Installation of the Sprocket	56-57	Removal of Sprocket, Installation of Sprocket, Air Bleeding, Striking Jig, Tightening Torque M16
Removal and Installation of Take-Up Roller	58-67	Removal of Take-Up Roller, Installation of Take-Up Roller, Bushing Press-Fit Jig, Floating Seal Installation Jig, Fill Engine Oil
Removal and Installation of Grease Cylinder	68-69	Removal of Grease Cylinder, Installation of Grease Cylinder, Track Guard, Grease Cylinder Installation Bolt Tightening
Assembly and Disassembly of Tension Shock Absorber	70-73	Configuration Diagram, Dimension Diagram, Jig Dimension Diagram, Disassembly Procedures, Assembly Procedures, Dust Seal Press-Fit Jig, U-Packing, Check Valve Tightening Torque
Removal and Installation of Center Joint	74-77	Removal of Center Joint, Installation of Center Joint, Vacuum Pump, Pilot Hoses
Assembly and Disassembly of Center Joint	78-84	Configuration Diagram, Dimension Diagram, Jig Dimension Diagram, Disassembly Procedures, Assembly Procedures, Axle Removal Jig, Packing Rings, V-Ring
Removal and Installation of Travel Motor	85-89	Removal of Travel Motor, Installation of Travel Motor, Air Bleeding, High-Pressure Hoses, Tightening Torque M16
Assembly and Disassembly of Travel Motor	90-136	Tools for Assembly and Disassembly, Motor Disassembly Procedures, Motor Assembly Procedures, Troubleshooting, Structural Diagram
Maintenance Standards	137-145	Drive Sprocket, Take-Up Roller, Upper Roller, Lower Roller, Track Shoe, Inspection Gauge
Pressure Measurement and Adjustment Procedures	146	Main Pressure Measurement
Drain Volume Measurement Procedures	147-148	Preparations, Travel Motor Drain Volume Measurement
Air Bleed Procedure	149-150	Hydraulic Pump Air Bleeding, Cylinder Air Bleeding, Swing Motor Air Bleeding, Travel Motor Air Bleeding
Swing Unit and Counterweight	151-197	Swing Motor Specifications, Swing Unit Removal and Installation, Swing Motor Assembly and Disassembly, Counterweight Removal and Installation
Hydraulic Circuit Explanation (Standard Model)	198-268	Travel Circuit, Swing Circuit, Boom Circuit, Arm Circuit, Bucket Circuit, Negative Control Circuit
Option Circuits	269-286	Breaker Circuit, Double-Acting Circuit, Multi-Purpose Circuit, 2nd Option Circuit, Hydraulic Rotation Fork

Quick Reference Specifications

Specification	Value	Page
Travel Unit Operating pressure	34.3 MPa (4975.341 psi)	p. 7
Travel Unit Operating flow	234.0 L/min (61.818 gpm)	p. 7
235X3 Track shoe width	600 mm (23.622 in)	p. 6
235X3 Grouser height	26 mm (1.027 in)	p. 6
Main Relief Valve (Standard) Pressure Setting	34.3 MPa / 343 bar / 4974 psi	p. 286
Main Relief Valve (Boost) Pressure Setting	36.8 MPa / 368 bar / 5337 psi	p. 286
Boom Raising Port Secondary Relief Pressure Setting	38.7 MPa / 387 bar / 5612 psi	p. 286
Boom Lowering Port Secondary Relief Pressure Setting	29.4 MPa / 294 bar / 4264 psi	p. 286
Travel hydraulic motor operating pressure	34.3 MPa	p. 7
Center joint operating pressure (High-pressure passage)	34.3 MPa	p. 8
Shoe bolt tightening torque	751 - 849 N·m	p. 36
Upper roller bolt tightening torque	521 - 608 N·m	p. 39

Brand	Link-Belt
Model	235X3
Machine Type	Hydraulic Excavator
Manual Type	Service Manual
Language	English
Format	Searchable PDF (Digital Download)
Pages	286
File Size	29 MB
Manual No.	15955044-0
Wiring Diagrams	Yes
Hydraulic Schematics	Yes
Torque Specifications	Yes
Bookmarked / Indexed	Yes

Link-Belt 235X3 Service Manual with Wiring Diagrams

What's Inside This Manual

Quick Reference Specifications

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