Steering: 164: - Power Steering Whine - Page 2

dingov70 · Sep 3rd, 2015, 19:24

Drain off the gear oil quickly . The easiest ATF to use is dextron III available anywhere ( even Asda !) . At a push you can replace it with iso 46 hydraulic oil . I have done this on many machines with zero side effects on the system .

The problem with using gear oil is its additive pack , which is designed to withstand extreme shearing forces generated by gear teeth working against each other . ATF & ISO 46 oil pour very much like water when cold , EP ( gear oils) turn very thick due to the base stock oil . At worst , could snap the drive belt , right after the pump breaks of the vanes that create pressure & jams the rotor head . A light oil / fluid allows the vanes in the rotor head to fling outwards due to the turning force generated by the engine turning the pump assembly , the thick oil impedes that action that at its simplest can result in no power assistance when needed most . Further the gear oil additives can adversly affect the seals in your power steering system , leading to leaks & bursts occuring . Been there , fixed that , written big bills for ruined kit

Hope this helps

Steve

chindit · Sep 3rd, 2015, 23:00

Why would any one dream of putting Ep 90 gear oil in a power steering system ? ..this has to be wind up surely

Dylan144GT · Sep 13th, 2015, 21:01

Hi Guys,

Sorry it has taken me so long to respond. I was getting no response and then I forgot about it. Anyway, I am here.

I went with the previous owners research and reasoning that GL-4 was yellow metal friendly and that perhaps a worn power steering box may been a more viscous fluid in order to operate "properly". Having said that, we did do it partly as an experiment too. We had the oil around with no use for it and we wanted to know whether it was just low on oil or whether the problems lay deeper. As such, we experimented freely and now that we know that it is just a case of refilling the reservoir we have put in the right fluid.

Thanks for the responses and concerns, it is much appreciated!

Dylan

Sep 3rd, 2015, 19:24	#11
dingov70 Master Member Last Online: Apr 22nd, 2024 06:42 Join Date: Jan 2015 Location: Blackpool	Drain off the gear oil quickly . The easiest ATF to use is dextron III available anywhere ( even Asda !) . At a push you can replace it with iso 46 hydraulic oil . I have done this on many machines with zero side effects on the system . The problem with using gear oil is its additive pack , which is designed to withstand extreme shearing forces generated by gear teeth working against each other . ATF & ISO 46 oil pour very much like water when cold , EP ( gear oils) turn very thick due to the base stock oil . At worst , could snap the drive belt , right after the pump breaks of the vanes that create pressure & jams the rotor head . A light oil / fluid allows the vanes in the rotor head to fling outwards due to the turning force generated by the engine turning the pump assembly , the thick oil impedes that action that at its simplest can result in no power assistance when needed most . Further the gear oil additives can adversly affect the seals in your power steering system , leading to leaks & bursts occuring . Been there , fixed that , written big bills for ruined kit Hope this helps Steve __________________ To stupidity & beyond

Sep 3rd, 2015, 23:00	#12
chindit I've Been Banned Last Online: Sep 8th, 2015 13:34 Join Date: Aug 2015 Location: fernley	Why would any one dream of putting Ep 90 gear oil in a power steering system ? ..this has to be wind up surely

Sep 13th, 2015, 21:01	#13
Dylan144GT Member Last Online: May 21st, 2023 08:35 Join Date: Aug 2008 Location: Cape Town	Hi Guys, Sorry it has taken me so long to respond. I was getting no response and then I forgot about it. Anyway, I am here. I went with the previous owners research and reasoning that GL-4 was yellow metal friendly and that perhaps a worn power steering box may been a more viscous fluid in order to operate "properly". Having said that, we did do it partly as an experiment too. We had the oil around with no use for it and we wanted to know whether it was just low on oil or whether the problems lay deeper. As such, we experimented freely and now that we know that it is just a case of refilling the reservoir we have put in the right fluid. Thanks for the responses and concerns, it is much appreciated! Dylan

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