Description

Bobcat 520, 530, 533 1987 Service Manual

If you’re trying to rebuild a Bobcat skid-steer loader without the factory documentation, you’re wasting time and risking a safety incident. I’ve seen guys torque head bolts by feel and then wonder why the engine leaks oil. This Bobcat 520, 530, 533 1987 Service Manual is the original Melroe publication—not a third-party reprint. It gives you the exact specs that the guys in the factory used when these machines were new. No guesswork.

That 170-page count covers every system on the 520, 530, and 533 models. You get separate engine service chapters because the 533 uses a different engine than the 520/530. The manual includes complete torque values, fluid capacities, wiring diagrams, and step-by-step tear-down procedures. If you’ve been relying on a Chilton or Haynes for a skid-steer, stop. Those aftermarket books skip critical details like the hydrostatic system calibration.

Preventive Maintenance – Start Here

Chapter 1 of the manual lays out the daily, weekly, and monthly checks required to keep the loader running. It includes the correct fluids, filter part numbers, and greasing points. I’ve seen too many machines come in with blown seals because the owner skipped the daily inspection. The manual tells you exactly what to look for, from hydraulic leaks to loose bolts. Page 1-1 has the maintenance schedule. Use it.

Engine Service for 520/530 and 533 – Separate Chapters

Chapters 5 and 6 are dedicated to engine service—chapter 5 for the 520 and 530, chapter 6 for the 533. These are not combined. The 533 uses a different engine configuration, and the torque specs for head bolts and manifolds differ. Section 5-1 covers removal and installation of the engine assembly for the 520/530. If you mix these up, you’ll strip threads or worse. The manual also includes compression test procedures and valve adjustment specs. Don’t skip the torque sequence for the cylinder head—it’s in there.

Hydraulic System and Hydrostatic System – Two Separate Chapters

Chapters 7 and 8 break down the hydraulic system (implement hydraulics) and the hydrostatic system (drive). These are not the same thing. The hydrostatic section includes pump and motor overhaul, charge pressure testing, and adjustment procedures. The manual warns about high-pressure oil injection injuries—read the safety precautions on page 7-1 before opening any lines. If you need to rebuild a pump, this manual gives you the clearances and seal part numbers. For a general understanding of transmission components, refer to Manual Transmission to understand how gear ratios affect drive torque.

Does This Manual Cover the Electrical System?

Yes. Chapter 9 is the full electrical system section. It includes wiring diagrams for the 520, 530, and 533, showing color codes and connector pinouts. You’ll find the starter and alternator test procedures, the safety interlock circuit logic, and the fuse locations. A common failure on these machines is the ignition switch wiring; the diagram on page 9-1 shows exactly which wires go where. If you have a no-crank condition, start with the voltage drops at the starter relay. The manual also includes the battery ground connection torque. Don’t use a generic wiring diagram—factory is the only way to avoid shorts.

Bobcat 520, 530, 533 1987 Service Manual – Technical Data on Section 10-1

Section 10-1 is the technical data chapter. It holds all the torque specs, fluid capacities, bolt grades, and adjustment limits. This is the page you’ll tape to the wall of your shop. Need the hydraulic relief pressure? It’s there. Want the wheel lug nut torque? It’s there. Engine oil capacity? 5.5 quarts for the 530. The manual also includes conversion charts and thread sizes. Aftermarket sources often round these numbers down or up, and that causes leaks. Factory data is non-negotiable.

When you’re reassembling the drive system, cross-reference chain tension and sprocket alignment with Manual Transmission for common wear patterns. The 520 and 533 use different chaincases, so don’t interchange parts without checking the manual.

Will this manual work for a 1986 Bobcat 520?

This manual covers 1987 models only. Serial number ranges are not listed.

Does it include wiring diagrams?

Yes, the Electrical System section (Chapter 9) includes complete wiring diagrams for the 520, 530, and 533. It shows the color codes, connector pinouts, and the routing of the harness. If you have a dead short or a non-starting machine, start with those diagrams before replacing parts. You’ll also find the starter and alternator test procedures. This is the same info the dealer used in 1987.

Can a beginner use this manual?

Yes, but you need basic mechanical skills and a torque wrench. The manual assumes you can read a diagram and follow safety warnings.

Is this a digital access?

Yes. After purchase you get a PDF of the full 170 pages.

If you want to skip the aftermarket confusion and get straight to the work, Bobcat 520, 530, 533 1987 Service Manual – OEM Factory Specs. That’s the original document. Bobcat S175 2008 Service Manual – OEM Factory Repair Specs and Bobcat S185 2008 Service Manual – 998 Pages of Factory Specs are also available for later models. Access the Factory Manual now and stop guessing.