Description

PAT DS 350, 1307 Operators Manual – LMI Handbook for Crane Operators

You’re running a crane, the load is swinging, and the LMI starts screaming. If you’re trying to guess what the PAT DS 350 is telling you, you’re going to drop something. That’s why this PAT DS 350, 1307 Operators Manual exists. It’s 36 pages of straight-up factory procedure for the DS 350 and 1307 load moment indicators. No aftermarket reprint. This is the original from PAT.

If you skipped the warnings, you are violating the first rule of crane operation. Page 1 of this manual calls out the Warnings section loud and clear: the LMI is an aid, not a substitute for an operator’s brain. I’ve seen guys disable the alarm because they thought they knew better. This manual tells you exactly when the DS 350 locks out crane functions and why. Read it before you pick up a load.

The manual covers four main sections: General Information, Warnings, System Description, and Programming Procedure. Then it hits you with Pre-Operation Inspection and Calibration Verification on page 27. That’s the section you cannot skip. You check the calibration every day, or you don’t lift. Period.

DS 350 Load Moment Indicator: What It Monitors

System Description starts on page 3. The DS 350 monitors boom length, boom angle, working radius, rated load, and actual lifted weight. It uses sensors on the boom and outriggers. The Operating Console and Control Identification are on page 5. You need to know which button does what before you touch the programming. This is not a video game. Mistaking the RCL button for the config button can lock you out.

Programming the Outrigger and Boom Configuration

Section 4, starting on page 21, covers programming. You set the outrigger configuration on page 22. Then the boom configuration on the same page. If you have a 1307 system, the sequence is the same. Then you set the lifting operation mode on page 24 and the reevings on page 25. Page 25 is critical — get the reevings wrong and the LMI will calculate the wrong capacity. I’ve seen a 50-ton crane derate itself because a tech punched in two parts of line instead of four. Factory spec is all you trust.

Does This Manual Cover Calibration?

Yes. Section 5, Pre-Operation Inspection and Calibration Verification, page 27. That is where you verify that the sensors zero out correctly. The manual tells you the steps to check boom angle sensor offset and length sensor readings. If the calibration is off by more than the allowable tolerance, you do not operate. No shortcuts. The PAT DS 350 manual is the only document that gives you the exact factory procedure. Aftermarket manuals will say “refer to manufacturer” — that’s a cop-out. This is the manufacturer.

Why Factory Specs Matter

PAT made the DS 350 and 1307. They wrote this Operators Manual. The copyright is 1996, first edition. That means every torque spec, every pin-out, every warning in these 36 pages comes from the engineers who designed the system. I’ve compared aftermarket reprints that flipped the pin numbers on the 12-pin connector. That will smoke your control board. This manual is the only source for correct connector assignments and system function. You want to trust your $200,000 crane to a photocopy? Not on my job site.

Most crane operators think they can wing it. Then they hit a false overload alarm and spend three hours chasing a ghost. This manual saves you that time because it lists the exact troubleshooting steps on page 35. It’s a slim 36-page document, but it covers system description (page 3), control identification (page 5), programming, calibration, and troubleshooting. That’s everything you need to keep the LMI working correctly.

Related Manuals

• PAT iFLEX5 DS 350 2003 Operators Manual
• PAT DS 350 IFLEX5 2003 Service Manual
• PAT DS 350 2001 Operators Manual

This is not like a generic Manual Transmission repair guide. This is specific to the PAT LMI. Nor is it a Manual Transmission theory book — it’s a hands-on operator handbook. You get the real deal from PAT.

Is this manual for the DS 350 only?

No.

Does the manual include wiring diagrams?

Wiring diagrams are not in this Operators Manual. That content lives in the Service Manual. The Operators Manual focuses on operation, programming, and pre-op checks. If you need pin-outs, get the PAT DS 350 Service Manual.

What if my crane has a different configuration?

The manual supports DS 350 and 1307 systems. If your crane uses a different PAT model like iFLEX5, you need the iFLEX5 specific manual. The programming sequences for outrigger and boom configuration are unique to each system. Do not cross-program.

Can I use this on an iFLEX5 system?

The iFLEX5 has different control algorithms and display menus. The 1307 is an earlier generation. Using this manual on an iFLEX5 will cause errors in setting reevings and operation modes. Buy the correct manual for your system.

You need this on the workbench next to the crane. Not in a drawer. Not bookmarked on a smartphone that loses reception. Print it out. The 36 pages fit in a three-ring binder. Every time you start a shift, flip to page 27 and run the pre-op check. Then program the configuration from page 22. That is how you keep the PAT DS 350 honest. Access the Factory Manual from AutoRepairManuals and put it where you can see it.