Lull printed part number 10709939 on this 22-page factory operator manual for its 400 series high-lift loaders, and what you download is that same book. If a Lull 400, 7C2-31 operator manual PDF is what you searched for, all three variants in the family are covered here, including side tilt operation. The lubrication chart runs a full quarter of the book, mapping tower lube points and fluid capacities for both gasoline and Waukesha diesel engines. Four wheel drive operating procedures, a fork safety checklist, tire mounting safety, and the standard forklift hand signals round out the rest. Air the front tires to 50 psi on the left and 48 on the right, hold the rears at 40, and keep the 400 under its 4,000 lb load capacity. Just you, the machine, and nobody to call. Bookmarks and a real text layer take you from the cover to the lube chart in two taps.
What's Inside This Lull 400-34, 7C2-31 Operator Manual
| System | Pages | Key Topics |
|---|---|---|
| Copyright | 2 | Publication Rights, Retrieval System, Reproduction Permission |
| Preface | 3 | |
| Operating Instructions | 4-5 | Side Tilt Operating Instructions |
| Maintenance | 6-10 | Four Wheel Drive Operation, Operating Precautions, Load Capacity Cautions, Operating Procedures |
| Servicing Electrical System | 11 | |
| Lubrication Chart | 12-17 | Lubrication Specifications, Gasoline Capacities, Tower Lubrication Points, Diesel Capacities |
| Fork Safety Checklist | 18 | Abrasion, Bent Forks, Cracks |
| Tire Mounting Safety | 19-20 | Rim Component Seating, Valve Core, Rim Inspection, Tire Inflation, Safety Cage, Lock Ring Guard |
| Forklift Signals | 21 | Stop, Raise Load, Lower Load |
| Worldwide Locations | 22 | Corporate Office, International Branches, Service Centers |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| All Models | ||
| Left front tire inflation pressure | 50 psi | p. 6 |
| Right front tire inflation pressure | 48 psi | p. 6 |
| Left Front Tire Pressure | 50 psi | p. 6 |
| Right Front Tire Pressure | 48 psi | p. 6 |
| Rear Tire Pressure | 40 psi | p. 6 |
| Torque Converter Oil Change Interval | 300 hours | p. 13 |
| Tire Calcium Chloride Weight | 375 lbs | p. 14 |
| 400 | ||
| Maximum Load Capacity | 4000 lbs | p. 9 |
| 400 (Gasoline) | ||
| Hydraulic System Capacity | 25 gal | p. 14 |
| Fuel Tank Capacity | 20 gal | p. 14 |
| 400 (Waukesha Diesel) | ||
| Hydraulic System Capacity | 25 gal | p. 16 |
| Fuel Tank Capacity | 20 gal | p. 16 |
Lull 400-34, 7C2-31 Common Problems This Manual Covers
Lull 400 boom drifts down slowly after shutdown and forks settle overnight with no load
Check the hydraulic tank level and top off; a 400 with the Waukesha diesel holds 25 gallons (page 16). Cycle the boom fully up and down at low idle to purge trapped air, following the air pocket removal procedure on page 7. If drift continues after bleeding, park the boom down and call your dealer.
Manual Section: Hydraulic Control Lever Operation p. 7One loader function stops working after reconnecting attachment hydraulics, other circuits operate normally
Inspect each quick coupler and reseat it until it locks fully home, with the engine off and pressure relieved at the levers. Check hoses for kinks per the hydraulic maintenance steps on page 6, then verify oil level; a gasoline model 400 holds 25 gallons (page 14). Cycle the dead function slowly to bleed air.
Manual Section: Hydraulic System Maintenance p. 6Steering feels jerky and fights the wheel, noticeably worse in crab steer
Check tire pressures cold before blaming the steering circuit: 50 psi left front, 48 psi right front, 40 psi rear, per the maintenance schedule on page 6. Uneven fronts make crab steer bind and buck. Grease the steering linkage points shown in the lubrication chart on page 12, then retest at slow speed.
Manual Section: Maintenance p. 6Transmission shifts intermittently or hangs up in neutral on cold damp mornings
Clean and tighten the battery ground strap connections covered in the electrical servicing section on page 11; weak grounds mimic shift failures on these machines. Work the shift lever through every range to free a sticking cable. Keep torque converter oil fresh on the 300 hour interval listed on page 13.
Manual Section: Servicing Electrical System p. 11Machine feels tippy and rear end goes light when carrying pallets at full height
Verify the load against the capacity plate before lifting; the model 400 is rated for 4000 pounds maximum (page 9). Keep the load low while traveling and follow the pallet handling guidance in the load handling section. Inspect forks for bends and cracks using the checklist on page 18 before every shift.
Manual Section: Load Handling and Stability p. 9Frequently Asked Questions
What are the tire pressure specifications for the Lull 400?
The left front tire should be inflated to 50 psi, the right front tire to 48 psi, and the two rear tires to 40 psi. In difficult ground conditions like sand or mud, tire pressure can be lowered to as low as 20 psi to improve grip, but loads must be lighter to prevent tire rupture. p. 13
What is the maximum load capacity for the Lull 400?
The maximum load capacity for the Lull 400 is 4000 lbs. When lifting this maximum load, the center of the load must not be more than 24 inches from the heel of the fork, and the load must be divided evenly between the forks. p. 9
What is the hydraulic system capacity for the gasoline model Lull 400?
The hydraulic system and reservoir capacity for the gasoline-powered Lull 400 is 25 gallons. p. 14
How often should the torque converter oil be changed?
The torque converter oil should be changed after the first 20 hours of operation on new machines. After that initial change, it should be changed every 300 hours of operation, along with the converter oil filter. p. 13
What is the recommended procedure for filling the hydraulic tank?
Fill the tank full of hydraulic oil, then raise and lower the hoist cylinders and fully extend and retract every cylinder on the system, including the steering cylinders. After all cylinders are full, fill the supply tank to the upper check level plug. p. 6
Is this Lull 400 Operator Manual a digital download?
Immediate download of the complete 22-page searchable Operator Manual. Access it on any device, from a laptop at your desk to a phone in the field.
Can I print specific sections of this Lull 400 Operator Manual?
Yes. No DRM, nothing blocks printing, so run off the pages you need on whatever printer you have.
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