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my 1990 LS400 sat in a garage for 4 yrs b4 it was given to me. Front brake hoses dry rotted so i replaced one one yr and the other one went so I replaced it to; besides the white wire electrical problem i ve given up on I have a power steering pump question. The car had 255K on it when i got it; now its at 291k. power steering worked great but started to leak from the short hose on passenger side. I went to change it and it fell apart in my hand; Once I changed it the the longer one going to the driver side started to leak (power steering still worked great)i changed it and the old one fell apart in my hand. now i have no leaks and no power steering; when u look in the pump while car is running there is no movement in the fluid. I have a P/t job at an auto parts store when I look up the pump it says there is a filter in the resevoir that should be changed. i bought the 1990 LS repair (shop) manual and there is nothing in it about a filter; Im thinking if there is a filter when these lines failed garbage clogged up the filter. Where is the filter? is there a power steering filter? or is my pump shot? Thanks for any info

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It seems unlikely the PS pump magically the same day you changed a broken hose. I would look elsewhere first. I wonder if the cracking hoses dumped a bunch of crud into the lines and now that is plugging things up. If you suction some fluid out of reservoir with a turkey baster is it full of particles or clear?

Maybe try bleeding the system per below (in case of air lock):

3. BLEED AIR IN POWER STEERING SYSTEM

NOTICE:

If you replace or separate the components for power steering

oil pressure line, bleed air in the power steering system

after the operation.

(a) Idle the engine at 1,000 rpm or less until bubbles in the

fluid disappear. (Be sure not to turn the steering wheel.)

( b ) When the bubbles disappear, slowly turn the steering

wheel from lock to lock 2 or 3 times.

( c ) Repeat procedures (a) and ( b ) until the fluid level in the

reservoir becomes stable and bubbles disappear. If the

fluid level goes below the MAX line, add fluid.

(d) When the fluid level becomes stable, increase and decrease

oil pressure 2 or 3 times for both left and right by

turning the steering wheel to the full lock positions and jiggling

it there.

(e) Make sure that no bubbles exist in the reservoir. When

turning the steering wheel quickly or turning it from lock

to lock position, check that the steering wheel is not heavy

to turn and there is no abnormal noise or vibration.

(f) When there are fluid leaks or abnormalities after bleeding

air, repair them and repeat procedures (a) to (e). If the abnormalities

still exist, replace the related parts.

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It seems unlikely the PS pump magically the same day you changed a broken hose. I would look elsewhere first. I wonder if the cracking hoses dumped a bunch of crud into the lines and now that is plugging things up. If you suction some fluid out of reservoir with a turkey baster is it full of particles or clear?

Maybe try bleeding the system per below (in case of air lock):

3. BLEED AIR IN POWER STEERING SYSTEM

NOTICE:

If you replace or separate the components for power steering

oil pressure line, bleed air in the power steering system

after the operation.

(a) Idle the engine at 1,000 rpm or less until bubbles in the

fluid disappear. (Be sure not to turn the steering wheel.)

( b ) When the bubbles disappear, slowly turn the steering

wheel from lock to lock 2 or 3 times.

( c ) Repeat procedures (a) and ( b ) until the fluid level in the

reservoir becomes stable and bubbles disappear. If the

fluid level goes below the MAX line, add fluid.

(d) When the fluid level becomes stable, increase and decrease

oil pressure 2 or 3 times for both left and right by

turning the steering wheel to the full lock positions and jiggling

it there.

(e) Make sure that no bubbles exist in the reservoir. When

turning the steering wheel quickly or turning it from lock

to lock position, check that the steering wheel is not heavy

to turn and there is no abnormal noise or vibration.

(f) When there are fluid leaks or abnormalities after bleeding

air, repair them and repeat procedures (a) to (e). If the abnormalities

still exist, replace the related parts.

i cant get past the first part because there is no movement in the fluid to cause bubbles; where is the filter located? inline? 90 ls400

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