Bobcat 325, 328 2008 Service Manual – Factory Specs

Description

Let me tell you something straight. If you’re wrenching on a Bobcat 325 or 328 compact excavator and you don’t have the factory service manual, you’re guessing. And guessing on a hydraulic system that runs at 3000 psi? That’s how parts get broken, lines blow, and people get hurt. This Bobcat 325, 328 2008 Service Manual is the one Bobcat dealers used. 748 pages, not a single page of fluff. Page 3 alone will remind you why you never skip the safety section — it spells out the fire prevention rules for electrical, fueling, and welding in plain language. I’ve seen too many guys bypass the Engine serial number check and bolt on the wrong starter. Stop doing that.

Hydraulic System Coverage: Cylinders, Valves, and Pump Specs

Hydraulics are the heart of these machines. The manual dedicates a full section to each cylinder — boom, arm, bucket, blade, clamp — with disassembly and assembly procedures. It also covers the main relief valve adjustment, port relief valves, and the pressure reducing valve. Need to test the piston pump or the gear pump? The Hydraulic Pump chapter gives you the torque adjustment values and flow testing steps. This is not a generic overview; it’s the exact procedure Bobcat factory techs use. For earlier model years, check the Bobcat 325 328 331 2006 Service Manual if your serial number falls outside the ranges listed here.

Safety Instructions: Why Page 3 Matters

Page 3 of this manual is not optional reading. It covers fire prevention during maintenance, operation, electrical work, and hydraulic system service. It tells you to lower the bucket and blade before maintenance, to vent exhaust when running the engine indoors, and to keep a fire extinguisher nearby. Ignoring these instructions gets people hurt. The manual also includes the Emergency Exit procedure from the cab and the exact way to lift and block the excavator. If you’re a home garage enthusiast, this is your insurance policy against a 5,000-pound machine crushing you.

Engine Service and Fuel System Specifications

Engine oil change intervals, fuel filter replacement, and air bleeding are all in the Engine Lubrication System and Fuel System chapters. The manual includes an oil viscosity chart and the correct fuel specifications. It also covers the accessory drive belt tension and adjustment. Pro tip: do not try to guess the belt tension — use the spec given in the manual. While this excavator manual doesn’t cover cars, the precision needed here is similar to rebuilding a Manual Transmission; you need the exact torque, not a hand-wave.

Does This Manual Cover the Electrical System?

Yes. The Electrical section (listed under Fire Prevention and in the Safety and Maintenance chapters) includes wiring diagrams, connector views, and troubleshooting steps for the start circuit and charging system. It also covers the spark arrestor exhaust system. If you’re chasing an intermittent electrical fault, the factory diagrams are the only reliable source. Aftermarket drawings often omit the ground paths. Don’t waste hours probing wires blind — use the OEM schematic.

Bobcat 325, 328 2008 Service Manual: What You Get

You get a 748-page PDF with searchable bookmarks: Safety, Maintenance, Hydraulic System, and more. The hydraulic section alone includes schematics with approved symbols, troubleshooting for cylinder, swing, and travel circuits, and valve disassembly procedures. The manual also explains how to test and adjust the crossport relief valves and the pressure reducing valve. Every procedure includes the required tool list and torque values. This is the same document Bobcat issued to dealers in 2008 — no third-party shortcuts, no missing pages. For the 2007 variant, see Bobcat 325 328 2007 Service Manual if your serial prefix is earlier. For very old pre-2000 models, there’s Bobcat 325 328 1998 Service Manual.

3 Reasons to Choose OEM Documentation Over Aftermarket

First, torque specs. Aftermarket manuals often round or guess. This manual gives you the factory spec, verified by Bobcat engineers. Second, safety warnings. The OEM manual includes the exact lockout procedures and fire prevention rules specific to this machine. Third, accuracy. Aftermarket diagrams may have missing pins or swapped wire colors. I’ve had to rewire a 328 because someone used a generic wiring guide. Don’t be that guy. The quality of your work depends on the quality of your reference.

Lifting and Blocking the Excavator: Factory Procedure

The Safety and Maintenance chapter tells you the correct lifting points and blocking procedure for the 325 and 328. It also covers the upperstructure slew lock operation. Never lift an excavator without following these steps. The manual even includes how to open and close the tailgate and right side cover for service access. The same attention to detail extends to the transmission — if you work on other equipment, the methodical approach here is like rebuilding a Manual Transmission; step by step, no skipped fastener.

Is this manual in Imperial or Metric units?

Metric. It’s a Bobcat factory manual.

Does it cover the wiring diagrams for the 325 and 328?

Yes, the Electrical section includes complete schematics. However, note that the manual covers serial numbers AAC511001 and above for 325, A9K011001 and above for 325, and A9K111001 and above for 328. Make sure your machine falls within those ranges. The wiring diagrams are detailed with connector pinouts and wire colors. Also included are troubleshooting steps for starting circuit, charging system, and control modules.

You’ve seen enough. You know the difference between a manual that’s been through three photocopiers and the original factory file. This is the latter. Access the Factory Manual now and get the correct specs for your Bobcat 325 or 328.