Description

Bobcat 520, 530, 533 1987 Service Manual

If you’re working on a Bobcat 520, 530, or 533 from 1987 and you don’t have the factory manual, you’re wasting time and risking mistakes. I’ve seen guys guess on hydraulic pressures and blow O-rings. I’ve watched others use generic torque specs from the internet and snap bolts in the final drive. This 170-page OEM manual from Melroe/Ingersoll-Rand kills that guesswork. It’s the same binder the dealer techs used – dealer copy, not for resale, printed March 1987.

Open page 1 and you get the full maintenance safety section – that’s two full pages of warnings that most aftermarket PDFs skip. I don’t care if you’re a home garage guy or a pro with ten years in the seat: you need those warnings. The manual covers every major system: hydraulic (section 2), hydrostatic (section 3), drive system (section 4), main frame (section 5), electrical (section 6), and two separate engine service sections – one for the 520/530 (section 7) and one for the 533 (section 8). Section 9 holds the technical data you’ll use on every job: torque values, fluid capacities, and adjustments.

Hydraulic System: Factory Procedures and Specs

Section 2 dives into the hydraulic system with step-by-step removal, inspection, and installation procedures. You get the factory flow chart for troubleshooting – no guessing which component is starvation is at. Need to replace a lift cylinder? The manual tells you which seals to use and the exact torque for the gland nut. Aftermarket manuals will tell you “tighten securely.” That’s useless. Page 2-1 starts with a system overview, then moves to pump removal, control valve service, and cylinder rebuild. If you’ve ever had a Bobcat drift down with the lift arms up, you’ll appreciate the detailed spool valve clearance specs in this section.

Engine Service for the 520/530 and the 533 – What’s Different?

Two separate sections – that’s how factory manuals handle it. Section 7 covers the engine used in the 520 and 530 models. Section 8 is dedicated to the 533 engine. Don’t swap procedures between them. The 533 has different piston rings, valve adjustments, and injection pump timing. I’ve seen a guy put a 520 head gasket on a 533 because he thought “all Bobcat 1.6L engines are the same.” It leaked within 50 hours. The manual gives you the Engine assembly sequence, torque sequence for head bolts, and valve clearance settings. Each section includes a exploded view with part numbers – use those to order the right gaskets.

Does the Electrical System Section Include Wiring Diagrams?

Section 6 – Electrical System – gives you the full wiring diagram for the 520, 530, and 533. You get the starter circuit, charging system, instrument panel, and safety switch interlock logic. If your Bobcat won’t crank, you start by checking the seat switch continuity – the manual shows you the test points. It also covers the fuse block layout and wire colors. I’ve used this section to trace a short in the glow plug circuit on a cold Texas morning. Saved me three hours of poking with a test light. The diagram is on a fold-out page (page 6-4) – make a copy before you get grease on it.

7 Major Systems Covered in This Manual

Here’s what you get with these 170 pages:
– Preventive Maintenance (charging, fluids, filters)
– Hydraulic System (pumps, valves, cylinders)
– Hydrostatic System (drive motors, charge pressure)
– Drive System (chains, sprockets, final drives)
– Main Frame (lift arms, cab, roll cage)
– Electrical System (wiring, switches, battery)
– Engine Service (two separate sections for 520/530 and 533)
– Technical Data (torque specs, capacities, adjustments)
That’s every part you’ll touch during a rebuild or repair. No omissions.

Get the Right Torque Values from Technical Data

Turn to section 9 – Technical Data. It’s a one-stop table for all critical torque specs: wheel lug nuts, hydraulic fittings, engine head bolts, and driveline fasteners. For example, the cylinder head bolt torque for the 533 engine is listed with the tightening sequence and step increments. Page 9-1 also includes fluid capacities (engine oil, hydraulic tank, chain case). If you’re rebuilding a hydrostatic drive, the charge pressure spec is in this section – don’t trust a generic number from a forum. This manual was written by the engineers who designed the machine.

Source Authenticity: OEM vs Aftermarket

This is a dealer copy – not a reprint or third-party scan. Melroe/Ingersoll-Rand printed it in 1987. The safety warnings alone (page 3) prove it’s factory material – they reference the Operation & Maintenance Manual and include specific part numbers for lift arm support devices. Aftermarket manuals strip out the safety text to save space. They also omit the alphabetical index (section 10) that lets you find any component in seconds. I’ve wasted money on $20 PDFs that miss the entire hydrostatic section. This one is complete.

FAQ

What models does this manual cover?

Bobcat 520, 530, and 533 skid steer loaders from 1987.

How many pages and what year was it published?

170 pages, published in 1987 (March revision).

Does the manual include wiring diagrams and torque specs?

Yes. Section 6 (Electrical System) contains complete wiring diagrams for all three models. Section 9 (Technical Data) lists all factory torque values, fluid capacities, and adjustment specs. Page 6-1 starts the electrical coverage with a system diagram, and page 9-1 gives the technical data table including cylinder head bolt torque, hydraulic fitting torque, and drive chain adjustment.

What about the hydrostatic system – is that covered?

Section 3 is dedicated to the hydrostatic system, including charge pump removal, drive motor overhaul, and pressure test procedures. You also get the correct charge pressure specification from the Technical Data section.

Related Manuals

• Bobcat 520, 530, 533 Skid Steer Loader Service Manual
• Bobcat S175 2008 Service Manual – OEM Factory Repair Specs
• Bobcat S185 2008 Service Manual – 998 Pages of Factory Specs

For additional background on the drive system, refer to Manual Transmission and Manual Transmission resources on transmission fundamentals.

Bottom line: if you’re rebuilding a 1987 Bobcat 520, 530, or 533, you need this manual on your bench. You can save the pdf to your phone or tablet, but print the torque pages and put them in a plastic sleeve. Access the Factory Manual and stop guessing.