Re: Buda HS-6 oil pressure

Posted by Steve@Advance on April 22, 2020 at 19:06:31 from (66.169.147.211):

In Reply to: Buda HS-6 oil pressure posted by tvscum on April 22, 2020 at 17:34:13:

It is very rare that the relief valve is out of adjustment, or that tightening it up will raise idle oil pressure.

Unless the spring is broken, the plunger is stuck, or something is holding the relief valve open, the problem is not in the relief valve.

Is this something new? As in a sudden loss of oil pressure? Is there any thing else unusual, like temperature increase, loss of power, unusual noises, extra blow-by?

If any of these are present, there is a problem that needs addressing.

But if it's been running near that pressure, or has very slowly dropped over the years, and everything else is still sounding and running the same, I would not be too concerned.

General rule of thumb, minimum allowable safe pressure is 10 PSI per 1000 RPM. That means if it has as low as 5 PSI at warm idle, it is moving oil through the system. I've seen old engines that would barely move the needle at idle, and they ran that way for ever.

Also consider it's use. This is not likely a working truck, and I hope it's not getting out on the freeway! So it probably has a fairly easy life.

Other things to consider, any chance the oil is contaminated with gas?

Has anything else been changed, like a hotter thermostat (if equipped)?

Does it have a canister type oil filter, and was it recently changed or added, or modified? The filter is likely a by-pass type that meters a small amount of oil through the filter and dumps back to the crankcase. If the orifice was enlarged or removed the oil pressure will drop.

The old engines were designed for straight weight, usually 30 weight oil. I personally prefer 15w40 diesel oil in the older engines, or stay with straight 30 or what ever the mfg recommended. It's rare low oil pressure can be corrected with heavier weight oil, but very light oil can lower it.

Hope there is nothing serious and it will be around for many more years!

Replies:

• Re: Buda HS-6 oil pressure Steve@Advance 19:36:16 04/22/20 (0)

Add a Reply! You must be Logged In to Post Name: E-Mail: Subject: Comments: Optional Link URL: Link Title: Optional Image URL: Optional Video Title: Optional Video Embed: Advanced Posting Options Email Notification: If you check this box, email will be sent to you whenever someone replies to this message. Your email address must be entered above to receive notification. This notification will be cancelled automatically after 2 weeks. No political comments, hate speech or bigotry of any kind will be tolerated. Violations will be removed and posting privileges may be permanently revoked without notice.   Advanced Posting Tools   Select Gallery Photo  Attach Serial No List  Return to Post  Upload Photos/Videos Choose Files from your local computer Upload one or more videos to your post. Photo and video filesizes should be less than 5MB. Formats allowed are gif, jpg, png, ogg, mp4, mov, and avi. Be sure to use filenames without spaces or special characters, and filetypes of 3 digits lower case.

TRACTOR PARTS	TRACTOR MANUALS

We sell tractor parts!  We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today. [ About Us ]