#NI
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Unknown brand name #790 type ribbon
Part #B140
The manufacturer no longer makes this part, and there's no substitute part
Model # 455 Official AT&T printer
Here are the diagrams and repair parts for Official AT&T 455 printer, as well as links to manuals and error code tables, if available.
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Symptoms for gas pressure washers
Choose a symptom to see related pressure washer repairs.
Main causes: faulty unloader valve, bad pressure regulator…
Main causes: stale fuel, gummed up carburetor, engine needs tune up, throttle and choke controls need adjustment, bad re…
Main causes: dirty air filter, stale fuel, clogged or dirty carburetor, bad unloader valve…
Main causes: broken recoil spring, damaged recoil starter…
Main causes: overfilling engine with oil, improper fuel/air mixture, choke system problems, dirty carburetor, engine nee…
Main causes: pump running for more than 5 minutes when the spray wand isn't being used, faulty pressure relief valve, ba…
Main causes: insufficient water supply, clogged water inlet screen, clogged pressure hose, faulty pump check valves, stu…
Main causes: using a high-pressure spray tip when applying detergent, clogged siphon tube, chemical injection system fai…
Main causes: damaged recoil starter, oil inside cylinder, locked up engine piston…
Repair guides for gas pressure washers
These step-by-step repair guides will help you safely fix what’s broken on your pressure washer.
How to install a pressure washer chemical injection kit
The chemical injection valve draws detergent into the pump. If it’s not drawing detergent, use a repair kit to replace t…
Repair difficulty
Time required
15 minutes or less
How to install a pressure washer O-ring kit
O-rings seal fittings on the pressure washer pump. Damaged seals allow water to leak from the pump. Follow these steps t…
Repair difficulty
Time required
45 minutes or less
How to replace a pressure washer pump
The pump can be damaged by air in the inlet water supply or by chemicals that remain in the pump body after using the ch…
Repair difficulty
Time required
15 minutes or less
Effective articles & videos to help repair your office
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