HOW TO: Adjust the Pressure Relief Valve (PRV) on the MF GC 1705/10/15/20

[cglaser104]

My 2015 GC1710 with DL95 has what appears to be 1/4" ISO 7241 - A series. Is this correct?

 

[GeneV]

I got a 2018 model. Having myself ordered the wrong male connect on Kenny's prv gauge, here's what I could tell you, go take another look at those couplers for any markings. On mine, the male connects just have some numbers that lead to nowhere on a google search. The female connects are Safeway 545-3P. I called Safeway, was told the male connects which match those are ISO 5676 3/8", which is what I ordered on Amazon yesterday.

 

[Nacademus]

My 2015 GC1710 with DL95 has what appears to be 1/4" ISO 7241 - A series. Is this correct?View attachment 623309View attachment 623310

That male coupler looks smaller than mine. Mine are 3/8". You may have the 1/4", here.

I would agree with you.

Pretty sure 2016+ they went with the larger couplers.

 

[GeneV]

Here's what fit my 2018 GC1710: https://www.amazon.com/gp/product/B07P442PRD/ref=ppx_yo_dt_b_asin_title_o03_s00?ie=UTF8&psc=1

 

[GeneV]

Finally got a chance to try out the gauge, got a reading of ~ 1900 psi, so guess it's fine.

 

[cglaser104]

I got my gage as well. I'm definitely showing some weakness in my system, which is fine, as it definitely isn't used as a lawn mower. I measured out at about 1730-1740 PSI. I figured I was getting weaker when I tried to lift something heavy I lifted a couple years ago that I could no longer lift as easily or highly. I'll have to fix that in the next few days before I start my next project of adding dual rear remotes.

 

[madhatter]

That male coupler looks smaller than mine. Mine are 3/8". You may have the 1/4", here.

I would agree with you.

Pretty sure 2016+ they went with the larger couplers.

I have the 1/4” on my 2015. Curious if it would make much of a difference to flow rate changing them to 3/8” ? Must have been some reason Massey changed them to a larger size.

 

[cglaser104]

I have the 1/4” on my 2015. Curious if it would make much of a difference to flow rate changing them to 3/8” ? Must have been some reason Massey changed them to a larger size.

Mine is a 2015 and I can confirm I had 1/4" fittings. I would expect a smaller size means faster flow as the pump volume is the same regardless of fitting size.

 

[kennyd]

I have the 1/4” on my 2015. Curious if it would make much of a difference to flow rate changing them to 3/8” ? Must have been some reason Massey changed them to a larger size.

Don’t wast your money.

 

[cglaser104]

So I bought the pressure gauge and tested 2 ports of my FEL on my GC1710. I noticed it this summer and have now confirm she's lost a little oomph from her younger days. Thanks to this thread I now know how to rectify the issue.

GC1710TLB Hydraulic Test 2 - YouTube

2015 GC1710TLB Hydraulic Test 1 - YouTube