| Author |
Message |
dougthebonifiedbusnut (24.62.99.43)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, September 14, 2004 - 10:06 pm: | |
A short time ago I was inquiring about a fix for my pump which was making a lot of noise.Well I Called a fellow crown with a Vickers pump and asked if he knew anything about them. We got around to the noise part and he asked me if I knew how to bleed the system and I told him I did not. He then proceeded to tell me how. Now I don't know if this pertaines to all systems or just to Vickers pumps with an actuator and a hydraulic cylendar on the tie rod. I tend to think the latter. He said to turn the wheel all the way to the left and hold it there at about 1500 rpm for about 30 seconds or (and this is important) the noise goes away and then do the same with the wheel turned all the way to the left I did this for about 5 cycles and the air was dispersed and the steering is working perfectly. Hope this info helps someone else at some point. Oh one other point , hold the wheel hard in the two positions. |
BrianMCI96A3 (69.34.169.52)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, September 14, 2004 - 10:30 pm: | |
Well, yes that will do it, by holding the wheel hard at full lock you are causing the relief valve to open to allow pressure to bleed off.
Starting with a full reservoir, generally most hydraulic steering systems will bleed off any air if you simply turn the wheel fully from lock to lock.
The holding the wheel hard may help to eliminate stuborn air pockets, but holding the steering wheel in that position is not recomended for much long than a few seconds because causing the relief valve to open creates a large amount of heat that is transfered to the hydraulic fluid.
Brian |
Marc Bourget (209.142.38.81)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, September 15, 2004 - 10:45 am: | |
FEI, (for everybody's information)
The heat is generated by "shear" from internal or intermolecular friction from the oil being forced at high pressure through the restricted aperature of the relief valve.
Both a bad and good phenomena, it's used advantageously in plastic molding to melt resins.
Onward and Upward
Marc Bourget |
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