Power steering hard - 2007 Hyundai Accent GS Hatchback

Didn't I answer this yesterday?
Question edited for clarity. Please always include model. Some models have known issues!

Sometimes after a power steering pump is installed, reduced pressure inside the hydraulic lines will build, which can create the symptoms you're experiencing. In other cases, low power steering fluid levels can cause this to occur, as can air bubbles trapped in the hydraulic lines.
Jan 3, 2018

Hard to turn steering wheel after power steering pump replaced

Videos as well

https://www.google.com/search?q=hard+steering+after+changing+steering+pump

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Possible causes for a stiff steering wheel are a loose or damaged power steering belt, low power steeringfluid levels, a damaged or leaking power steering rack or a broken power steering pump.

What can cause a steering wheel to be hard to turn? ' Reference.com

https://www.reference.com/.../can-cause-steering-wheel-hard-turn-8b7a03d931c5d8cd steering wheel is hard to turn Google Search

if it is electric power steering pump and hard to steer then the motor for the pump is not operational
check relays and fuses

The starter has nothing to do with hard steering. For hard steering check the front tire air pressure, power steering fluid, and the power steering belt.

The power steering system includes a P.S. pump which will whine when you turn a hard left or right while in park. There are also power steering hose that can leak. Then there is also a power steering gear box. Unless you have a rack and pinion steering system. Then that is changed as a unit.

The power steering might hard due to:
-Rack and pinion adjustment too tight.
-Front tires (improperly inflated, unevenly worn).
-Front wheel alignment (incorrect).
-Front suspension (Lower ball joint) .
-Steering gear assembly.
-Power steering motor.
-Battery and power source system.
-Power source voltage of power steering ECU.
-Power steering ECU.

Hard to turn steering at times......Not making noisey sound. How can you tell if fluid is down or bad.....?

Problems associated with low power steering fluid…

Hard Vehicle Steering
A low power steering fluid level can often times cause a vehicle's steering to become hard and labored. Adequate amounts of power steering fluid are necessary to enable a vehicle's power steering system to function and operate at optimum levels. A lack of power steering fluid in a vehicle's power steering system reduces the amount of hydraulic fluid pressure necessary to efficiently operating the various parts of the entire power steering system. Power steering fluid supplies the fluid force needed to operate the power steering gears and to enable power steering gearbox operation. Low power steering fluid levels reduce this hydraulic pressure, which commonly results in hard vehicle steering.

Pump Noise
It is very common for a low power steering fluid level to cause significant power steering pump noise. An adequate amount of power steering fluid is required to ensure the proper function and longevity of a power steering pump unit, which is a belt-driven pump responsible for housing and circulating power steering pump fluid. A low level of power steering fluid results in increased power steering pump friction, heat, and wear, all of which can significantly reduce the operational life of the power steering pump while at the same time cause excessive power steering pump noise.

Fluid Boiling
Many times a low power steering fluid level can result in excessive heating of power steering fluid, a condition that can seriously degrade the fluid and cause it to boil. A low power steering fluid level results in less available fluid to both lubricate and cool a power steering pump unit. A lack of power steering pump lubrication and cooling leads to excessive heat being generated within the power steering pump unit itself, a condition that translates into the available level of power steering fluid becoming super-heated and degraded. When this happens it is common for the power steering fluid to boil and lose all of its lubricating and heat-reducing capabilities.

Gearbox Wear
The power steering gearbox is a set of gears within a vehicle's power steering system designed to facilitate movement of a vehicle's front wheels. The power steering gearbox is connected to the power steering pump by hydraulic fluid lines that deliver a constant supply of power steering fluid to the power steering gearbox. A low power steering fluid level, especially a chronic and severe low power steering fluid level, can lead to increased friction and wear within the power steering gearbox assembly, a condition that can significantly shorten the operational life of the power steering gearbox and negatively affect its operation

If the pump fluid level full?

not too hard if you have some tools.

1. Raise and support the vehicle.
   

1. Remove the power steering pump pulley (3A733). Refer to the procedure in this section.
   

1. Place a drain pan under the power steering pump (3A674).
   

1. Remove the power steering pressure hose bolt from the power steering pump. Place the power steering pressure hose (3A719) up and out of the way.
   
2. Remove the two power steering reservoir pump hose bolts. Place the power steering reservoir pump hose up and out of the way.
   
3. Remove the three front power steering pump bolts.
   
1. Remove the rear power steering pump bolt.
   
1. Remove the power steering pump from the vehicle.