Bobcat 553 2006 Service Manual – OEM Factory Specs for Skid-Steer Loader

Description

You want to rebuild a Bobcat 553 hydrostatic pump or adjust the tilt lock valve without a manual? Good luck. I’ve cleaned up after too many shade-tree jobs where a missing torque spec or wrong relief setting cost someone a grand in parts. This Bobcat 553 2006 Service Manual is the original factory document—409 pages of the same procedures a dealer tech uses. Not a reprint, not a third-party interpretation. It’s the actual PDF that Bobcat (Ingersoll Rand) printed for their service bays, marked “Dealer Copy — Not for Resale”. That’s what you’re getting.

Hydraulic System Schematics and Troubleshooting

Hydraulic system failures eat billable hours fast. This manual lays out the full HYDRAULIC/HYDROSTATIC SCHEMATICS section so you can trace lines and identify components without guesswork. The HYDRAULIC SYSTEM INFORMATION chapter includes a troubleshooting chart and specific tighten procedures for fittings. Need to check the main relief valve? The manual walks you through both with and without auxiliaries. Lift cylinder and tilt cylinder removal/installation, disassembly/assembly—it’s all in there. You’ll find identification charts for the hydraulic control valve spools, load check valves, port relief valves, and the anti-cavitation check valve. Spool seal installation is detailed with the correct orientation. No shortcuts.

Engine Lubrication: Oil Specs and Filter Replacement

The engine lubrication system chapter gives you an oil chart—weight, capacity, and intervals. Replacing oil and filter is covered step by step, including the correct torque for the drain plug and filter housing. Don’t trust the parts store computer; use the OEM specs from page [DATA NEEDED] of this manual. The fuel system chapter includes fuel specifications, filling procedure, filter replacement, and the proper way to remove air from the fuel system. Skipping the purge step will have you chasing a no-start.

Seat Bar Restraint System Inspection

Safety isn’t optional. The SEAT BAR RESTRAINT SYSTEM section describes the system and gives you a clear inspection procedure and maintenance steps. I’ve seen operators bypass the interlock; don’t be that guy. This manual also covers the BOB-TACH inspection, auxiliary control lockbolt removal, and the lift arm support device installation. If you’re working under raised lift arms, you need that support device properly installed. The manual shows you exactly how.

Does This Manual Cover the Hydrostatic Pump?

Yes, and it goes deeper than any aftermarket source. The HYDROSTATIC PUMP section includes checking charge pressure (critical for diagnosing drivability issues), removal and installation, drive coupler removal, parts identification, and full disassembly/assembly. The same treatment applies to the hydrostatic motor, including timing procedure. There’s a troubleshooting chart for the hydrostatic system and a replenishing valve function description. If you’re dealing with a machine that won’t move or has poor steering response, that chart alone can save you hours of swapping parts. The steering linkage neutral adjustment procedure is also detailed—something many skip, leading to drift.

Factory Specs vs Aftermarket: Why This Manual Wins

Aftermarket manuals often combine multiple models or omit serial number splits. This one is specific to Bobcat 553 with S/N 528011001 & Above and S/N 528111001 & Above. It’s the dealer copy—published by Bobcat Company in 2006, printed in the USA. You get the exact torque values, the exact wiring (if applicable), and the exact fluid capacities. No guesswork. I’ve compared aftermarket hydraulic schematics to factory ones; the aftermarket drawings miss branches and valve port numbers. That gets you a leak or a no-flow condition. Stick with the OEM document. If you need a different year range, check the Bobcat 553 2008 Service Manual for later updates.

FAQ

Is this manual the same as the one dealers use?

Yes. It’s the dealer copy—not for resale, but you’re getting the same document.

What if my serial number isn’t listed?

The manual covers two serial number ranges: 528011001 & Above and 528111001 & Above. If your machine’s serial number falls outside either of these, the procedures and specs may not match your loader. For skid steers built before these ranges, the Bobcat 553 1998 Service Manual might be appropriate, but verify first. Bobcat often updates components mid-production. Using specs for a different serial range can result in incorrect torque values, wrong fluid capacities, or even safety hazards. Always check the serial plate on your machine—located on the frame near the operator cab—and compare with the ranges listed in this manual. If you’re uncertain, contact your Bobcat dealer or look for the specific edition. Never assume compatibility.

Related Manuals

• Bobcat 553 2006 Service Manual

The final drive transmission (chaincase) section covers checking and adding oil—different from a vehicle Manual Transmission but requires the same attention to detail. For other equipment with a Manual Transmission, you’ll need a separate factory manual.

To wrap up: if you’re working on a Bobcat 553, don’t open a wrench without the OEM specs. Access the Factory Manual now and have the entire 409-page document on your tablet or printed for the shop. One job will pay for it.