Description

PAT DS 350, LS 248H 1998 Operators Manual – Factory Manual for Lattice Boom Crane Capacity Limiters

If you’re running a Link-Belt lattice boom crane with a PAT DS 350 Rated Capacity Limiter System, you’ve got a machine that demands respect. This 68-page PAT DS 350, LS 248H 1998 Operators Manual is the factory documentation PAT issued for the DS 350 console (and the LS 248H operating codes). It’s not a reprint or a third-party summary. It’s the original 1998 handbook, Revision B dated 10/20/97, with the exact tables and procedures PAT sent to dealers. If you’re skipping the pre-operational inspection because you “know the machine,” you’re gambling with a dropped load. This manual tells you what to check and why.

2. System Description and Console Controls

Chapter 4 of the manual covers Console Controls and Displays (page 3). The DS 350 console has indicators for load, angle, radius, and warning lights. You need to understand what each LED means before you touch the lockout controls (chapter 5, page 11). PAT designed these systems so the operator has no guesswork on load limits. But that only works if you read the display legends. The manual spells out the function of every button and indicator, including the % capacity bar graph. I’ve seen operators ignore a flashing amber warning because they thought it was a glitch. That amber means you’re within 90% of rated capacity – time to back off.

Pre-Operational Inspection: What to Check Before You Start

Section 6 (page 12) is the Pre-Operational Inspection. PAT lists 14 checkpoints, from verifying the console self-test to inspecting the angle sensor cable. This isn’t a suggestion – it’s the procedure that keeps the system from giving you false readings. One common failure is a loose ground on the main harness. The manual points you to the exact connections to inspect. If the console shows “Err” after power-up, you missed something in this checklist. Don’t bypass it because you’re in a hurry. Accident reports show that most capacity limiter failures trace back to skipped inspection steps.

Troubleshooting Guide: Diagnostics Without Guessing

When the system locks you out or gives bogus load readings, turn to chapter 10 (page 18). The Troubleshooting Guide has a symptom-to-cause table. For example, if the display shows “Ld” with no load, the manual tells you to check the load cell wiring and the A/D converter on the console board. It also lists error codes that the DS 350 generates. PAT doesn’t want you opening the console box unless you’ve followed the service and maintenance chapter (chapter 8, page 15). That section covers fuse ratings, cable routing, and the annual calibration check. No guesswork. Real diagnostics.

Operating Codes: Why the LS 248H Section Exists

The manual includes a dedicated section for LS 248H operating codes. These are the configuration settings that tell the DS 350 which crane configuration it’s attached to – boom length, jib offset, and reeving. Chapter 11 lists the full code table. If you swap boom sections and don’t update the code, your load chart will be wrong. I’ve seen shops save a crane from a tip-over because they had the right code from this manual. The codes are specific to Link-Belt’s LS 248H lattice boom crane. Don’t mix them with other models. For other PAT manuals, check our PAT iFLEX5 DS 350 2003 Operators Manual and the PAT DS 350 IFLEX5 2003 Service Manual. If you need the older DS 350 console manual, we have the PAT DS 350 1307 Operators Manual.

Source Validity: OEM vs Aftermarket Documentation

This is a factory PAT manual, not a recompiled aftermarket PDF. The OCR excerpt shows the original revision table and copyright notice. PAT explicitly states the document is proprietary and subject to change without notice – that’s OEM language. Aftermarket manuals often skip the warnings section or simplify the wiring diagrams. This manual keeps the full text, including the notice about implied warranties. For a crane capacity limiter, you can’t afford missing safety info. The manual also references Link-Belt’s operating codes, meaning it was produced in cooperation with the crane manufacturer. That’s the level of authenticity you need when the load is 50 tons.

To compare with other technical documents, check our PAT DS 350, LS 248H 1998 Operators Manual page for related documents.

One more thing about torque specs: If you’re servicing the console mounting brackets or the load cell, the manual doesn’t list torque values. That’s because this is an operator’s manual, not a service manual. For service procedures, you’ll want the PAT DS 350 service manual. But for operation, inspection, and troubleshooting, this is the only document you need. And if you’re new to crane electronics, treat this like the “manual for a Manual Transmission” – you don’t skip the pre-flight check because you’re in a hurry. Manual Transmission manuals teach you the shift pattern; this one teaches you the load limit pattern.

The 1998 edition is still current for older DS 350 consoles because PAT didn’t change the basic architecture until the iFLEX series. If your console has a serial number starting with “DS350” and you don’t see iFLEX on the label, this manual covers it. The LS 248H codes are revision C5L0201 dated 06/02/98, so the crane-specific data is accurate for that vintage.

Audience Fit: Who Needs This Manual

Crane owners, riggers, safety officers, and lift planners all need a copy of this manual. If you’re an operator who has never seen the PAT system diagnostics page, you’re flying blind. If you’re a shop owner renting out an LS 248H, you should include this manual with the crane. The pre-operational inspection section alone can prevent a liability claim. Beginners in crane operation should read chapters 2 and 6 before they ever start the engine. The manual doesn’t assume you know the system – it teaches you the sequence step by step, without patronizing you.

Does this manual cover the LS 248H-specific operating codes?

Yes. Chapter 11 lists the operating codes for the LS 248H lattice boom crane. These codes configure the DS 350 console for boom length, jib offset, and reeving. Without the correct code, the load chart will be wrong.

What is the revision date of this manual?

The revision shown on the cover is B 10/20/97 for the DS 350 operator’s handbook. The LS 248H operating codes section is Revision A 06/02/98. Always verify revision against your console serial number. PAT updates codes when crane configurations change. This manual includes both revisions.

Don’t run a crane without the manufacturer’s operator manual. It’s the difference between a safe lift and a drop. Access the Factory Manual now and keep it in the cab. Your lift planner will thank you.