Description

GEHL 5450, 5510, 5575, 5750, 5950 Installation Manual

You get a brand new mixer feeder delivered to the lot, and the dealer setup sheets are missing. Or you’re a farm owner who bought used and need to know the right way to get it hooked up. That’s where this 15-page GEHL 5450, 5510, 5575, 5750, 5950 Installation Manual comes in. It’s the exact same document the factory ships with the machine. No aftermarket summary, no guesswork.

Before you touch a wrench, read the General Information section on fastening procedures. I’ve seen too many guys skip the sealant on that rear drive compartment plug and wonder why it leaks after a week. The manual spells it out: use sealant on the threads. Cap screw, lock washer, nut – that’s the standard. And if the part has a slot, a plain washer goes against the slotted surface. Lock nuts let parts rotate without separating. It’s all there, page 1.

General Information and Fastening Procedures

This isn’t a repair manual – it’s a setup guide for the 5450, 5510, 5575, 5750, and 5950 models. You’ll find the standard fastening method: cap screw, lock washer, nut. For slotted mounting holes, a plain washer goes between the screw head and the slot. The manual also notes that all hardware in the material flow path must have the screw head facing the material so nothing snags. That’s the kind of detail that prevents a broken auger down the road.

Trailer Models: 4-Step Setup

Step one: install the plug in the threaded hole under the rear drive compartment – page 1 shows exactly where. Step two: open the doors and add SAE 30W motor oil until it reaches the lower drive sprocket chain. Capacity is about 16 U.S. gallons (61 L). Step three: check the planetary gearbox oil level using the sight gauge on the left side. Step four: install two plugs in the threaded holes on the rear underside of the mixing chamber. That’s four major actions, but each has a figure reference. The manual expects you to look at the diagrams.

After the plugs and oil, you move to the PTO shaft. Install the shaft on the drive shaft with the key in place, tighten the setscrews. Then hook the PTO safety chain onto the trailer tongue. That chain is not optional – it keeps the shaft from dropping if a u-joint fails.

Why the PTO Safety Chain Matters

Page 2 of the manual shows the chain hooked to the trailer tongue. If you skip that step, a spinning PTO shaft can come loose and whack around. I’ve pulled that chain off a few wrecked machines – not pretty. The manual also tells you to check for proper assembly, adjustment, and lubrication. Then inspect all bolts and setscrews. Finally, make sure no tools or foreign objects are left in the mixing chamber or discharge chute. That’s a standard cleanup step that gets ignored.

Towing Safety: Weight Ratios and Speed Limits

The manual includes a warning table for towing speeds. Loaded mixer weight vs tractor weight determines your max speed. If the ratio is 1:1 or less, you can go 20 mph (32 km/h). Between 2:1 and 1:1, drop to 10 mph (16 km/h). More than 2:1 – don’t tow it. The tractor brakes must be in good condition before you connect. That’s not a suggestion; it’s written in a WARNING block. Always verify the actual loaded weight in the operator’s manual.

Tractor Drawbar Alignment

Page 3 covers the drawbar setup. The centerline of the drawbar pin hole must be 14 inches from the end of the tractor PTO shaft for 540 RPM units, and 16 inches for 1000 RPM units. That offset ensures the driveline angles stay within spec. If you’re using a tractor with a Manual Transmission, verify the PTO output shaft length first. For tractors with a Manual Transmission that has a fixed drawbar, you may need a sliding adapter. The manual notes that correct adjustment prevents premature bearing wear.

3 Things to Check Before First Use

One: oil level in the rear drive compartment and planetary gearbox. Two: all shields in place – don’t run it with a missing cover. Three: no loose hardware or foreign objects in the mixing chamber. The manual repeats these checks at the end of the trailer section. Run through them every time you hook up a new machine. For a complete parts breakdown, see the GEHL 5450 5510 5575 5750 5950 Parts Catalog. If you need the installation instructions for the 8435-8500 models, grab the GEHL 8435 8500 Installation Manual – Factory Specs. For the 7285-7500 series, the GEHL 7285 7335 7210 7435 7500 Installation Manual – OEM Specs covers those units.

Does the manual include torque specifications for bolts?

No – this is a setup guide, not a full service manual. It describes the standard fastening method (cap screw, lock washer, nut) but doesn’t list torque values. For torque specs, refer to the operator’s manual or the service manual for your specific model.

How many pages is the manual?

15 pages.

What models are covered?

The manual covers the GEHL 5450, 5510, 5575, 5750, and 5950 mixer feeders. It’s the same document used for all five models.

Does the manual explain oil capacities?

Yes. On page 1 it states the rear drive compartment takes approximately 16 gallons of SAE 30W motor oil (U.S. measure). It also tells you to check the planetary gearbox oil level using the sight gauge, but does not give a capacity for that gearbox – you fill to the gauge mark.

If you’re tired of hunting through dealer brochures or relying on a previous owner’s memory, this is the document that gets the job done right. Access the Factory Manual from the product page and keep a printed copy in the machine’s tool box. Fifteen pages of straight factory procedure – no filler, no aftermarket interpretation.