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This is the factory Caterpillar repair set for the 226B3 skid steer loader with the Cat C2.2 diesel, 2008-2014 machines, bundled as 15 section PDFs totaling 2440 pages. You get all three layers Cat dealers work from: Systems Operation to understand how a circuit is supposed to behave, Testing and Adjusting with real numbers (main relief 23000 kPa / 3336 psi, charge pressure 3100 kPa at low idle, high idle 3195 rpm), and Disassembly and Assembly for the actual wrench work. The test procedures are Cat's family-wide B3 series content, so they apply to your 226B3 exactly as the dealer would run them. Coverage runs from the hydraulic system and power train through the fuel, cooling, electrical and operator station.
What's Inside This Caterpillar 226B3 Repair Manual
| System | Pages | Key Topics |
|---|---|---|
| Air Inlet and Exhaust System | 1-38 | C2.2 Air Inlet, Turbocharger, Exhaust, Air Cleaner |
| Basic Engine | 39-305 | C2.2 Engine Disassembly and Assembly, Cylinder Head, Block, Crankshaft |
| Cooling System | 306-417 | Radiator, Water Pump, Thermostat, Fan Drive and Fan Speed Checks |
| Electrical and Starting System | 418-665 | Alternator, Starter, Batteries, Harnesses, Circuit Tests |
| Engine Arrangement | 666-747 | Engine Mounting and Arrangement |
| Frame and Body | 748-790 | Frame, Covers, Guards, ROPS |
| Fuel System | 791-894 | Injection Pump, Injectors, Filters, Fuel System Testing |
| Hydraulic System | 895-1385 | Main and Line Relief Test and Adjust, Pumps, Control Valves, Cylinders, Hydraulic Tank |
| Implements | 1386-1435 | Loader Arms, Bucket, Quick Coupler Linkage |
| Lubrication System | 1436-1493 | Oil Pump, Filters, Lubrication Routing |
| Machine Arrangement | 1494-1500 | Overall Machine Arrangement |
| Operator Station | 1501-1993 | Cab, Controls, Seat Bar Interlock, Display |
| Power Train | 1994-2412 | Hydrostatic Drive: Charge Pressure, Speed Sensing, Drive Motors, Chain Case |
| Service Equipment and Supplies | 2413-2431 | Special Tools, Service Supplies, Sealants |
| Work Tools | 2432-2440 | Work Tool Hydraulics and Attachment Service |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Main Relief Pressure | 23000 ± 700 kPa (3336 ± 102 psi) | p. 992 |
| Line Relief Valve Pressure - Lift Cylinder Head Lift (Standard and Hi-Flow) | 27600 ± 700 kPa (4003 ± 102 psi) | p. 1001 |
| Line Relief Valve Pressure - Lift Cylinder Head Lift (Hi-Flow XPS) | 27600 ± 700 kPa (4003 ± 102 psi) | p. 1001 |
| Line Relief Valve Pressure - Tilt Cylinder Head Tilt Forward (Standard and Hi-Flow) | 24500 ± 700 kPa (3554 ± 102 psi) | p. 1001 |
| Line Relief Valve Pressure - Tilt Cylinder Head Tilt Forward (Hi-Flow XPS) | 24500 ± 700 kPa (3554 ± 102 psi) | p. 1001 |
| Line Relief Valve Pressure - Tilt Cylinder Rod Tilt Back (Standard and Hi-Flow) | 27600 ± 700 kPa (4003 ± 102 psi) | p. 1001 |
| Line Relief Valve Pressure - Tilt Cylinder Rod Tilt Back (Hi-Flow XPS) | 27600 ± 700 kPa (4003 ± 102 psi) | p. 1001 |
| Low Idle Engine RPM | 1350 ± 50 RPM | p. 2051 |
| Charge Pressure (Low Idle, Oil Temp 45° ± 5°C) | 3100 ± 200 kPa (450 ± 29 psi) | p. 2051 |
| Speed Sensing Pressure (Low Idle, Oil Temp 45° ± 5°C) | 900 ± 200 kPa (131 ± 29 psi) | p. 2051 |
| High Idle Engine RPM | 3195 ± 65 RPM | p. 2052 |
| High Idle Fan RPM (Standard Fan) | 2900 ± 50 RPM | p. 2052 |
Caterpillar 226B3 Common Problems This Manual Covers
Hydraulic oil seeping or leaking around the hydraulic tank
Nine times out of ten this is a failed O-ring at a tank connection or mounting flange, not a cracked tank. The Disassembly and Assembly pages for the hydraulic tank show every sealed joint, the O-ring locations and the correct assembly order so you replace the right seal the first time.
Manual Section: Hydraulic System p. 895Loss of hydraulic pressure or intermittent pump output under load
Start with the charge pressure test: spec is 3100 kPa (450 psi) at low idle with oil at 45 C. Low or unstable readings point at worn piston pump internals or a failed speed sensing valve, spec 900 kPa. The manual gives the test ports, gauge setup and the pump teardown procedure.
Manual Section: Hydraulic System p. 895Machine will not start or hydraulics stay locked out with the operator seated
The seat sensor and interlock actuator assembly are the usual suspects. Worn keepers and springs or a damaged O-ring on the seat plug cause intermittent lockouts that look electrical. The wiring checks live in the electrical section and the actuator hardware teardown is in Operator Station.
Manual Section: Electrical And Starting System p. 418Low power, slow cycle times or engine speed that feels off
Before blaming the pump, verify the engine is turning what it should: low idle spec is 1350 rpm and high idle is 3195 rpm. The engine speed check procedure gives you the measurement method and adjustment steps, since every hydraulic pressure spec in the book assumes correct rpm first.
Manual Section: Fuel System p. 791Frequently Asked Questions
My 226B3 has weak or jerky hydraulics. Will this manual actually help me chase it down?
Yes, and this is where the book earns its money. Testing and Adjusting gives you the pressure taps and target numbers so you can test instead of guess: main relief at 23000 kPa (3336 psi), lift line relief at 27600 kPa, tilt forward at 24500 kPa, and charge pressure of 3100 kPa at low idle with the oil at temperature. If charge pressure is low, the piston pump section walks you through inspection of the rotating group, seals and the speed sensing valve.
The machine cranks fine but the loader functions are locked out, or it will not start at all. Is the interlock system covered?
It is. The B3 machines use a seat and armrest interlock that fails more often than the parts it protects. The Electrical And Starting System and Operator Station sections cover the seat sensor circuit, and Disassembly and Assembly covers the actuator hardware, the keepers, springs and the O-ring sealed seat plug that wear out and cause phantom lockouts. This is one of the most common no-go complaints on these machines and it is usually a cheap fix once you know where to look.
Can I use this to reset fault codes or service reminders on the 226B3?
Honest answer: the 226B3 is a pre-Tier 4 Final machine with a mechanically simple C2.2 diesel. There is no DEF or SCR system and no code reader workflow like on later machines. Diagnostics on this loader are done the old way, with a pressure gauge, a tachometer and a multimeter, and that is exactly what Testing and Adjusting is built around. If someone sold you on needing a laptop for this machine, they were thinking of a newer model.
Is this a dedicated 226B3 book or shared with other models?
The Systems Operation and Testing and Adjusting content is Cat's B3 family material, which is how Cat itself publishes it. The procedures, pressure specs and test setups apply to the 226B3 directly because the hydraulic and drive architecture is common across the family. You are getting the same pages a dealer tech pulls up for a 226B3, not a watered down generic manual.
What format is it, and can I print just the section I need?
It comes as 15 separate PDF files split by section, 2440 pages total, matching Cat's SIS structure from the 2012 publication. Because each system is its own file, you can print only the hydraulic Testing and Adjusting pages before a pump job instead of hauling a laptop into the shop. Searchable text, standard PDF, no special software needed.
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