Can’t find your part? Contact us:

+1-309-603-4777

Office

Model # 850 Official Texas Instruments business center

Here are the diagrams and repair parts for Official Texas Instruments 850 business center, as well as links to manuals and error code tables, if available.

There are a couple of ways to find the part or diagram you need:

Click a diagram to see the parts shown on that diagram.
In the search box below, enter all or part of the part number or the part’s name.

Not all parts are shown on the diagrams—those parts are labeled NI, for “not illustrated”.

We encourage you to save the model to your profile, so it’s easy to access parts and manuals for your appliance whenever you log in.

For DIY troubleshooting advice and repair guides, visit our repair help section.

Model diagram and schematic

SEARCH WITHIN THIS MODEL

ALL PARTS

Showing 10 of 138 parts |

Pull Tractor Assembly - Gray Options And Accessories 2244191-0002

#NI

All parts diagram

Pull tractor assembly - gray options and accessories

Part #2244191-0002

The manufacturer no longer makes this part, and there's no substitute part

Rs-422/rs-232-c Options And Accessory 2222542-8002

#NI

All parts diagram

Rs-422/rs-232-c options and accessory

Part #2222542-8002

The manufacturer no longer makes this part, and there's no substitute part

Top Cover Kit - Gray 2219865-0001

#NI

All parts diagram

Top cover kit - gray

Part #2219865-0001

The manufacturer no longer makes this part, and there's no substitute part

4k Memory Expansion And Esc Option Options And Accessories 2232793-8001

#NI

All parts diagram

4k memory expansion and esc option options and accessories

Part #2232793-8001

The manufacturer no longer makes this part, and there's no substitute part

Ground Clip Options And Accessory 2239435-0001

#NI

All parts diagram

Ground clip options and accessory

Part #2239435-0001

The manufacturer no longer makes this part, and there's no substitute part

Idler, Pulley, Ribbon Drive Service Assembly 2219879-0001

#NI

All parts diagram

Idler, pulley, ribbon drive service assembly

Part #2219879-0001

The manufacturer no longer makes this part, and there's no substitute part

Fastener, Pivot Pin Piece Parts 2225919-0001

#NI

All parts diagram

Fastener, pivot pin piece parts

Part #2225919-0001

The manufacturer no longer makes this part, and there's no substitute part

System Rom (851 - Xu2) (see Note 2) 2222475-0001

#NI

All parts diagram

System rom (851 - xu2) (see note 2)

Part #2222475-0001

The manufacturer no longer makes this part, and there's no substitute part

Stacking Tray Piece Parts 2239349-0001

#NI

All parts diagram

Stacking tray piece parts

Part #2239349-0001

The manufacturer no longer makes this part, and there's no substitute part

Shaft, Platen 2222405-0001

#NI

All parts diagram

Shaft, platen

Part #2222405-0001

The manufacturer no longer makes this part, and there's no substitute part

Symptoms for gas walk-behind mowers

Choose a symptom to see related walk-behind mower repairs.

Why does my lawn mower run rough?

Main causes: engine needs tune up, dirty or clogged carburetor, damaged flywheel key…

Why does my lawn mower cut unevenly?

Main causes: uneven wheel height settings, damaged wheel, dull or damaged cutting blade…

Why does my lawn mower vibrate a lot?

Main causes: damaged cutting blade, loose cutting blade, damaged flywheel key, engine needs tune up…

Why won't my lawn mower start?

Main causes: stale gas, engine needs tune up, bad spark plug, dead battery, bad recoil starter, faulty safety switch, ba…

Why does my lawn mower stall?

Main causes: dirty carburetor, bad spark plug, clogged air filter, engine choke problems, clogged gas cap vent…

Why won't my lawn mower move?

Main causes: drive control cable failure, worn or broken drive belt, bad transmission, broken drive wheel…

Repair guides for gas walk-behind mowers

These step-by-step repair guides will help you safely fix what’s broken on your walk-behind lawn mower.

How to replace a lawn mower spark plug

How to replace a lawn mower spark plug

Take a few minutes to replace the spark plug during your lawn mower's annual tune-up or if the spark plug is burnt or cr…

Repair difficulty

Time required

15 minutes or less

How to replace a lawn mower blade

How to replace a lawn mower blade

Check your lawn mower blade regularly and replaced it if it's bent or damaged. …

Repair difficulty

Time required

15 minutes or less

How to replace a lawn mower flywheel key on a flathead engine

How to replace a lawn mower flywheel key on a flathead engine

When you hit a hard object with your mower, the flywheel can shear to protect more expensive components. Learn how to re…

Repair difficulty

Time required

45 minutes or less

Effective articles & videos to help repair your office

Office and smart products articles | Sears PartsDirect

How to enjoy all the online benefits we offer on our Sears PartsDirect website

How to enjoy all the online benefits we offer on our Sears PartsDirect website

Learn about all the convenient features on our Sears PartsDirect website that make your parts purchases easier.…

Top questions about Sears and Sears PartsDirect

Top questions about Sears and Sears PartsDirect

Get answers to frequently asked questions about Sears and Sears PartsDirect.…

What does the Amazon Fire Stick Lite do?

What does the Amazon Fire Stick Lite do?

Learn what the Amazon Fire Stick Lite video streaming device does.…

Stay Connected